Hello,
changes since v1 (https://lore.kernel.org/linux-pci/[email protected]):
- New patch to simplify drivers/pci/xen-pcifront.c, spotted and
suggested by Boris Ostrovsky
- Fix a possible NULL pointer dereference I introduced in xen-pcifront.c
- A few whitespace improvements
- Add a commit log to patch #6 (formerly #5)
I also expanded the audience for patches #4 and #6 to allow affected
people to actually see the changes to their drivers.
Interdiff can be found below.
The idea is still the same: After a few cleanups (#1 - #3) a new macro
is introduced abstracting access to struct pci_dev->driver. All users
are then converted to use this and in the last patch the macro is
changed to make use of struct pci_dev::dev->driver to get rid of the
duplicated tracking.
Best regards
Uwe
Uwe Kleine-König (6):
PCI: Simplify pci_device_remove()
PCI: Drop useless check from pci_device_probe()
xen/pci: Drop some checks that are always true
PCI: Provide wrapper to access a pci_dev's bound driver
PCI: Adapt all code locations to not use struct pci_dev::driver
directly
PCI: Drop duplicated tracking of a pci_dev's bound driver
arch/powerpc/include/asm/ppc-pci.h | 3 +-
arch/powerpc/kernel/eeh_driver.c | 12 ++--
arch/x86/events/intel/uncore.c | 2 +-
arch/x86/kernel/probe_roms.c | 2 +-
drivers/bcma/host_pci.c | 6 +-
drivers/crypto/hisilicon/qm.c | 2 +-
drivers/crypto/qat/qat_common/adf_aer.c | 2 +-
drivers/message/fusion/mptbase.c | 4 +-
drivers/misc/cxl/guest.c | 21 +++----
drivers/misc/cxl/pci.c | 25 ++++----
.../ethernet/hisilicon/hns3/hns3_ethtool.c | 2 +-
.../ethernet/marvell/prestera/prestera_pci.c | 2 +-
drivers/net/ethernet/mellanox/mlxsw/pci.c | 2 +-
.../ethernet/netronome/nfp/nfp_net_ethtool.c | 2 +-
drivers/pci/iov.c | 23 ++++---
drivers/pci/pci-driver.c | 48 +++++++--------
drivers/pci/pci.c | 10 ++--
drivers/pci/pcie/err.c | 35 ++++++-----
drivers/pci/xen-pcifront.c | 60 ++++++++-----------
drivers/ssb/pcihost_wrapper.c | 7 ++-
drivers/usb/host/xhci-pci.c | 3 +-
include/linux/pci.h | 2 +-
22 files changed, 145 insertions(+), 130 deletions(-)
Range-diff against v1:
1: 7d97605df363 = 1: 8ba6e9faa18c PCI: Simplify pci_device_remove()
2: aec84c688d0f = 2: d8a7dc52091f PCI: Drop useless check from pci_device_probe()
-: ------------ > 3: f4b78aa41776 xen/pci: Drop some checks that are always true
3: e6f933f532c9 = 4: 50f3daa64170 PCI: Provide wrapper to access a pci_dev's bound driver
4: d678a2924143 ! 5: 21cbd3f180a1 PCI: Adapt all code locations to not use struct pci_dev::driver directly
@@ drivers/message/fusion/mptbase.c: mpt_device_driver_register(struct mpt_pci_driv
- id = ioc->pcidev->driver ?
- ioc->pcidev->driver->id_table : NULL;
+ struct pci_driver *pdrv = pci_driver_of_dev(ioc->pcidev);
-+ id = pdrv ? pdrv->id_table : NULL;
++ id = pdrv ? pdrv->id_table : NULL;
if (dd_cbfunc->probe)
dd_cbfunc->probe(ioc->pcidev, id);
}
@@ drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c: static void hns3_get_drvinfo
}
- strncpy(drvinfo->driver, h->pdev->driver->name,
-- sizeof(drvinfo->driver));
-+ strncpy(drvinfo->driver, pci_driver_of_dev(h->pdev)->name, sizeof(drvinfo->driver));
++ strncpy(drvinfo->driver, pci_driver_of_dev(h->pdev)->name,
+ sizeof(drvinfo->driver));
drvinfo->driver[sizeof(drvinfo->driver) - 1] = '\0';
- strncpy(drvinfo->bus_info, pci_name(h->pdev),
## drivers/net/ethernet/marvell/prestera/prestera_pci.c ##
@@ drivers/net/ethernet/marvell/prestera/prestera_pci.c: static int prestera_fw_load(struct prestera_fw *fw)
@@ drivers/pci/xen-pcifront.c: static pci_ers_result_t pcifront_common_process(int
pcidev = pci_get_domain_bus_and_slot(domain, bus, devfn);
- if (!pcidev || !pcidev->driver) {
-+ pdrv = pci_driver_of_dev(pcidev);
-+ if (!pcidev || !pdrv) {
++ if (!pcidev || !(pdrv = pci_driver_of_dev(pcidev))) {
dev_err(&pdev->xdev->dev, "device or AER driver is NULL\n");
pci_dev_put(pcidev);
return result;
}
- pdrv = pcidev->driver;
- if (pdrv) {
- if (pdrv->err_handler && pdrv->err_handler->error_detected) {
+ if (pdrv->err_handler && pdrv->err_handler->error_detected) {
+ pci_dbg(pcidev, "trying to call AER service\n");
## drivers/ssb/pcihost_wrapper.c ##
@@ drivers/ssb/pcihost_wrapper.c: static int ssb_pcihost_probe(struct pci_dev *dev,
@@ drivers/ssb/pcihost_wrapper.c: static int ssb_pcihost_probe(struct pci_dev *dev,
name = dev_name(&dev->dev);
- if (dev->driver && dev->driver->name)
- name = dev->driver->name;
-+
++
+ pdrv = pci_driver_of_dev(dev);
+ if (pdrv && pdrv->name)
+ name = pdrv->name;
5: 8c70ffd24380 ! 6: 02e6da6e5919 PCI: Drop duplicated tracking of a pci_dev's bound driver
@@ Metadata
## Commit message ##
PCI: Drop duplicated tracking of a pci_dev's bound driver
+ Currently it's tracked twice which driver is bound to a given pci
+ device. Now that all users of the pci specific one (struct
+ pci_dev::driver) are updated to use an access macro
+ (pci_driver_of_dev()), change the macro to use the information from the
+ driver core and remove the driver member from struct pci_dev.
+
Signed-off-by: Uwe Kleine-König <[email protected]>
## drivers/pci/pci-driver.c ##
base-commit: 2734d6c1b1a089fb593ef6a23d4b70903526fe0c
--
2.30.2
This prepares removing the driver member of struct pci_dev which holds the
same information than struct pci_dev::dev->driver.
Signed-off-by: Uwe Kleine-König <[email protected]>
---
arch/powerpc/include/asm/ppc-pci.h | 3 +-
arch/powerpc/kernel/eeh_driver.c | 12 ++++---
arch/x86/events/intel/uncore.c | 2 +-
arch/x86/kernel/probe_roms.c | 2 +-
drivers/bcma/host_pci.c | 6 ++--
drivers/crypto/hisilicon/qm.c | 2 +-
drivers/crypto/qat/qat_common/adf_aer.c | 2 +-
drivers/message/fusion/mptbase.c | 4 +--
drivers/misc/cxl/guest.c | 21 +++++------
drivers/misc/cxl/pci.c | 25 +++++++------
.../ethernet/hisilicon/hns3/hns3_ethtool.c | 2 +-
.../ethernet/marvell/prestera/prestera_pci.c | 2 +-
drivers/net/ethernet/mellanox/mlxsw/pci.c | 2 +-
.../ethernet/netronome/nfp/nfp_net_ethtool.c | 2 +-
drivers/pci/iov.c | 23 +++++++-----
drivers/pci/pci-driver.c | 28 ++++++++-------
drivers/pci/pci.c | 10 +++---
drivers/pci/pcie/err.c | 35 ++++++++++---------
drivers/pci/xen-pcifront.c | 3 +-
drivers/ssb/pcihost_wrapper.c | 7 ++--
drivers/usb/host/xhci-pci.c | 3 +-
21 files changed, 112 insertions(+), 84 deletions(-)
diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h
index 2b9edbf6e929..63938c156c57 100644
--- a/arch/powerpc/include/asm/ppc-pci.h
+++ b/arch/powerpc/include/asm/ppc-pci.h
@@ -57,7 +57,8 @@ void eeh_sysfs_remove_device(struct pci_dev *pdev);
static inline const char *eeh_driver_name(struct pci_dev *pdev)
{
- return (pdev && pdev->driver) ? pdev->driver->name : "<null>";
+ struct pci_driver *pdrv;
+ return (pdev && (pdrv = pci_driver_of_dev(pdev))) ? pdrv->name : "<null>";
}
#endif /* CONFIG_EEH */
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 3eff6a4888e7..0fc712a8775e 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -104,13 +104,14 @@ static bool eeh_edev_actionable(struct eeh_dev *edev)
*/
static inline struct pci_driver *eeh_pcid_get(struct pci_dev *pdev)
{
- if (!pdev || !pdev->driver)
+ struct pci_driver *pdrv;
+ if (!pdev || !(pdrv = pci_driver_of_dev(pdev)))
return NULL;
- if (!try_module_get(pdev->driver->driver.owner))
+ if (!try_module_get(pdrv->driver.owner))
return NULL;
- return pdev->driver;
+ return pdrv;
}
/**
@@ -122,10 +123,11 @@ static inline struct pci_driver *eeh_pcid_get(struct pci_dev *pdev)
*/
static inline void eeh_pcid_put(struct pci_dev *pdev)
{
- if (!pdev || !pdev->driver)
+ struct pci_driver *pdrv;
+ if (!pdev || !(pdrv = pci_driver_of_dev(pdev)))
return;
- module_put(pdev->driver->driver.owner);
+ module_put(pdrv->driver.owner);
}
/**
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index 9bf4dbbc26e2..14eb141b6cf2 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -1176,7 +1176,7 @@ static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id
* PCI slot and func to indicate the uncore box.
*/
if (id->driver_data & ~0xffff) {
- struct pci_driver *pci_drv = pdev->driver;
+ struct pci_driver *pci_drv = pci_driver_of_dev(pdev);
pmu = uncore_pci_find_dev_pmu(pdev, pci_drv->id_table);
if (pmu == NULL)
diff --git a/arch/x86/kernel/probe_roms.c b/arch/x86/kernel/probe_roms.c
index 9e1def3744f2..55bfafec9684 100644
--- a/arch/x86/kernel/probe_roms.c
+++ b/arch/x86/kernel/probe_roms.c
@@ -80,7 +80,7 @@ static struct resource video_rom_resource = {
*/
static bool match_id(struct pci_dev *pdev, unsigned short vendor, unsigned short device)
{
- struct pci_driver *drv = pdev->driver;
+ struct pci_driver *drv = pci_driver_of_dev(pdev);
const struct pci_device_id *id;
if (pdev->vendor == vendor && pdev->device == device)
diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c
index 69c10a7b7c61..f9bfae87ebd9 100644
--- a/drivers/bcma/host_pci.c
+++ b/drivers/bcma/host_pci.c
@@ -161,6 +161,7 @@ static int bcma_host_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct bcma_bus *bus;
+ struct pci_driver *pdrv;
int err = -ENOMEM;
const char *name;
u32 val;
@@ -176,8 +177,9 @@ static int bcma_host_pci_probe(struct pci_dev *dev,
goto err_kfree_bus;
name = dev_name(&dev->dev);
- if (dev->driver && dev->driver->name)
- name = dev->driver->name;
+ pdrv = pci_driver_of_dev(dev);
+ if (pdrv && pdrv->name)
+ name = pdrv->name;
err = pci_request_regions(dev, name);
if (err)
goto err_pci_disable;
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 1d67f94a1d56..303cc546f466 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -3003,7 +3003,7 @@ static int qm_alloc_uacce(struct hisi_qm *qm)
};
int ret;
- ret = strscpy(interface.name, pdev->driver->name,
+ ret = strscpy(interface.name, pci_driver_of_dev(pdev)->name,
sizeof(interface.name));
if (ret < 0)
return -ENAMETOOLONG;
diff --git a/drivers/crypto/qat/qat_common/adf_aer.c b/drivers/crypto/qat/qat_common/adf_aer.c
index d2ae293d0df6..162c2b9ef93d 100644
--- a/drivers/crypto/qat/qat_common/adf_aer.c
+++ b/drivers/crypto/qat/qat_common/adf_aer.c
@@ -185,7 +185,7 @@ static const struct pci_error_handlers adf_err_handler = {
int adf_enable_aer(struct adf_accel_dev *accel_dev)
{
struct pci_dev *pdev = accel_to_pci_dev(accel_dev);
- struct pci_driver *pdrv = pdev->driver;
+ struct pci_driver *pdrv = pci_driver_of_dev(pdev);
pdrv->err_handler = &adf_err_handler;
pci_enable_pcie_error_reporting(pdev);
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 7f7abc9069f7..b93e160560d4 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -838,8 +838,8 @@ mpt_device_driver_register(struct mpt_pci_driver * dd_cbfunc, u8 cb_idx)
/* call per pci device probe entry point */
list_for_each_entry(ioc, &ioc_list, list) {
- id = ioc->pcidev->driver ?
- ioc->pcidev->driver->id_table : NULL;
+ struct pci_driver *pdrv = pci_driver_of_dev(ioc->pcidev);
+ id = pdrv ? pdrv->id_table : NULL;
if (dd_cbfunc->probe)
dd_cbfunc->probe(ioc->pcidev, id);
}
diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c
index 186308f1f8eb..99b969b182b5 100644
--- a/drivers/misc/cxl/guest.c
+++ b/drivers/misc/cxl/guest.c
@@ -25,28 +25,29 @@ static void pci_error_handlers(struct cxl_afu *afu,
return;
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
- if (!afu_dev->driver)
+ struct pci_driver *afu_drv = pci_driver_of_dev(afu_dev);
+ if (!afu_drv)
continue;
switch (bus_error_event) {
case CXL_ERROR_DETECTED_EVENT:
afu_dev->error_state = state;
- if (afu_dev->driver->err_handler &&
- afu_dev->driver->err_handler->error_detected)
- afu_dev->driver->err_handler->error_detected(afu_dev, state);
+ if (afu_drv->err_handler &&
+ afu_drv->err_handler->error_detected)
+ afu_drv->err_handler->error_detected(afu_dev, state);
break;
case CXL_SLOT_RESET_EVENT:
afu_dev->error_state = state;
- if (afu_dev->driver->err_handler &&
- afu_dev->driver->err_handler->slot_reset)
- afu_dev->driver->err_handler->slot_reset(afu_dev);
+ if (afu_drv->err_handler &&
+ afu_drv->err_handler->slot_reset)
+ afu_drv->err_handler->slot_reset(afu_dev);
break;
case CXL_RESUME_EVENT:
- if (afu_dev->driver->err_handler &&
- afu_dev->driver->err_handler->resume)
- afu_dev->driver->err_handler->resume(afu_dev);
+ if (afu_drv->err_handler &&
+ afu_drv->err_handler->resume)
+ afu_drv->err_handler->resume(afu_dev);
break;
}
}
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 2ba899f5659f..1cf39275029f 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -1805,13 +1805,14 @@ static pci_ers_result_t cxl_vphb_error_detected(struct cxl_afu *afu,
return result;
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
- if (!afu_dev->driver)
+ struct pci_driver *afu_drv = pci_driver_of_dev(afu_dev);
+ if (!afu_drv)
continue;
afu_dev->error_state = state;
- if (afu_dev->driver->err_handler)
- afu_result = afu_dev->driver->err_handler->error_detected(afu_dev,
+ if (afu_drv->err_handler)
+ afu_result = afu_drv->err_handler->error_detected(afu_dev,
state);
/* Disconnect trumps all, NONE trumps NEED_RESET */
if (afu_result == PCI_ERS_RESULT_DISCONNECT)
@@ -2003,6 +2004,8 @@ static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev *pdev)
continue;
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
+ struct pci_driver *afu_drv;
+
/* Reset the device context.
* TODO: make this less disruptive
*/
@@ -2028,12 +2031,13 @@ static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev *pdev)
* shouldn't start new work until we call
* their resume function.
*/
- if (!afu_dev->driver)
+ afu_drv = pci_driver_of_dev(afu_dev);
+ if (!afu_drv)
continue;
- if (afu_dev->driver->err_handler &&
- afu_dev->driver->err_handler->slot_reset)
- afu_result = afu_dev->driver->err_handler->slot_reset(afu_dev);
+ if (afu_drv->err_handler &&
+ afu_drv->err_handler->slot_reset)
+ afu_result = afu_drv->err_handler->slot_reset(afu_dev);
if (afu_result == PCI_ERS_RESULT_DISCONNECT)
result = PCI_ERS_RESULT_DISCONNECT;
@@ -2074,9 +2078,10 @@ static void cxl_pci_resume(struct pci_dev *pdev)
continue;
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
- if (afu_dev->driver && afu_dev->driver->err_handler &&
- afu_dev->driver->err_handler->resume)
- afu_dev->driver->err_handler->resume(afu_dev);
+ struct pci_driver *afu_drv = pci_driver_of_dev(afu_dev);
+ if (afu_drv && afu_drv->err_handler &&
+ afu_drv->err_handler->resume)
+ afu_drv->err_handler->resume(afu_dev);
}
}
spin_unlock(&adapter->afu_list_lock);
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index 82061ab6930f..e085454c8b84 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -593,7 +593,7 @@ static void hns3_get_drvinfo(struct net_device *netdev,
return;
}
- strncpy(drvinfo->driver, h->pdev->driver->name,
+ strncpy(drvinfo->driver, pci_driver_of_dev(h->pdev)->name,
sizeof(drvinfo->driver));
drvinfo->driver[sizeof(drvinfo->driver) - 1] = '\0';
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_pci.c b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
index a250d394da38..180999c2165e 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_pci.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
@@ -720,7 +720,7 @@ static int prestera_fw_load(struct prestera_fw *fw)
static int prestera_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
- const char *driver_name = pdev->driver->name;
+ const char *driver_name = pci_driver_of_dev(pdev)->name;
struct prestera_fw *fw;
int err;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index 13b0259f7ea6..d3c1ca840fa7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -1876,7 +1876,7 @@ static void mlxsw_pci_cmd_fini(struct mlxsw_pci *mlxsw_pci)
static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
- const char *driver_name = pdev->driver->name;
+ const char *driver_name = pci_driver_of_dev(pdev)->name;
struct mlxsw_pci *mlxsw_pci;
int err;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
index 1b482446536d..5c25f6af3f62 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c
@@ -202,7 +202,7 @@ nfp_get_drvinfo(struct nfp_app *app, struct pci_dev *pdev,
{
char nsp_version[ETHTOOL_FWVERS_LEN] = {};
- strlcpy(drvinfo->driver, pdev->driver->name, sizeof(drvinfo->driver));
+ strlcpy(drvinfo->driver, pci_driver_of_dev(pdev)->name, sizeof(drvinfo->driver));
nfp_net_get_nspinfo(app, nsp_version);
snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
"%s %s %s %s", vnic_version, nsp_version,
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index dafdc652fcd0..7c6f0c466df8 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -164,13 +164,14 @@ static ssize_t sriov_vf_total_msix_show(struct device *dev,
char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
+ struct pci_driver *pdrv = pci_driver_of_dev(pdev);
u32 vf_total_msix = 0;
device_lock(dev);
- if (!pdev->driver || !pdev->driver->sriov_get_vf_total_msix)
+ if (!pdrv || !pdrv->sriov_get_vf_total_msix)
goto unlock;
- vf_total_msix = pdev->driver->sriov_get_vf_total_msix(pdev);
+ vf_total_msix = pdrv->sriov_get_vf_total_msix(pdev);
unlock:
device_unlock(dev);
return sysfs_emit(buf, "%u\n", vf_total_msix);
@@ -183,6 +184,7 @@ static ssize_t sriov_vf_msix_count_store(struct device *dev,
{
struct pci_dev *vf_dev = to_pci_dev(dev);
struct pci_dev *pdev = pci_physfn(vf_dev);
+ struct pci_driver *pdrv;
int val, ret;
ret = kstrtoint(buf, 0, &val);
@@ -193,13 +195,14 @@ static ssize_t sriov_vf_msix_count_store(struct device *dev,
return -EINVAL;
device_lock(&pdev->dev);
- if (!pdev->driver || !pdev->driver->sriov_set_msix_vec_count) {
+ pdrv = pci_driver_of_dev(pdev);
+ if (!pdrv || !pdrv->sriov_set_msix_vec_count) {
ret = -EOPNOTSUPP;
goto err_pdev;
}
device_lock(&vf_dev->dev);
- if (vf_dev->driver) {
+ if (pci_driver_of_dev(vf_dev)) {
/*
* A driver is already attached to this VF and has configured
* itself based on the current MSI-X vector count. Changing
@@ -209,7 +212,7 @@ static ssize_t sriov_vf_msix_count_store(struct device *dev,
goto err_dev;
}
- ret = pdev->driver->sriov_set_msix_vec_count(vf_dev, val);
+ ret = pdrv->sriov_set_msix_vec_count(vf_dev, val);
err_dev:
device_unlock(&vf_dev->dev);
@@ -376,6 +379,7 @@ static ssize_t sriov_numvfs_store(struct device *dev,
const char *buf, size_t count)
{
struct pci_dev *pdev = to_pci_dev(dev);
+ struct pci_driver *pdrv;
int ret;
u16 num_vfs;
@@ -392,14 +396,15 @@ static ssize_t sriov_numvfs_store(struct device *dev,
goto exit;
/* is PF driver loaded */
- if (!pdev->driver) {
+ pdrv = pci_driver_of_dev(pdev);
+ if (!pdrv) {
pci_info(pdev, "no driver bound to device; cannot configure SR-IOV\n");
ret = -ENOENT;
goto exit;
}
/* is PF driver loaded w/callback */
- if (!pdev->driver->sriov_configure) {
+ if (!pdrv->sriov_configure) {
pci_info(pdev, "driver does not support SR-IOV configuration via sysfs\n");
ret = -ENOENT;
goto exit;
@@ -407,7 +412,7 @@ static ssize_t sriov_numvfs_store(struct device *dev,
if (num_vfs == 0) {
/* disable VFs */
- ret = pdev->driver->sriov_configure(pdev, 0);
+ ret = pdrv->sriov_configure(pdev, 0);
goto exit;
}
@@ -419,7 +424,7 @@ static ssize_t sriov_numvfs_store(struct device *dev,
goto exit;
}
- ret = pdev->driver->sriov_configure(pdev, num_vfs);
+ ret = pdrv->sriov_configure(pdev, num_vfs);
if (ret < 0)
goto exit;
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 7dff574bb2fa..740d5bf5d411 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -443,7 +443,7 @@ static int pci_device_probe(struct device *dev)
static int pci_device_remove(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = pci_dev->driver;
+ struct pci_driver *drv = pci_driver_of_dev(pci_dev);
if (drv->remove) {
pm_runtime_get_sync(dev);
@@ -480,7 +480,7 @@ static int pci_device_remove(struct device *dev)
static void pci_device_shutdown(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = pci_dev->driver;
+ struct pci_driver *drv = pci_driver_of_dev(pci_dev);
pm_runtime_resume(dev);
@@ -576,7 +576,7 @@ static int pci_pm_reenable_device(struct pci_dev *pci_dev)
static int pci_legacy_suspend(struct device *dev, pm_message_t state)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = pci_dev->driver;
+ struct pci_driver *drv = pci_driver_of_dev(pci_dev);
if (drv && drv->suspend) {
pci_power_t prev = pci_dev->current_state;
@@ -617,7 +617,7 @@ static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
static int pci_legacy_resume(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = pci_dev->driver;
+ struct pci_driver *drv = pci_driver_of_dev(pci_dev);
pci_fixup_device(pci_fixup_resume, pci_dev);
@@ -636,7 +636,7 @@ static void pci_pm_default_suspend(struct pci_dev *pci_dev)
static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
{
- struct pci_driver *drv = pci_dev->driver;
+ struct pci_driver *drv = pci_driver_of_dev(pci_dev);
bool ret = drv && (drv->suspend || drv->resume);
/*
@@ -1224,16 +1224,17 @@ static int pci_pm_restore(struct device *dev)
static int pci_pm_runtime_suspend(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *pdrv = pci_driver_of_dev(pci_dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
pci_power_t prev = pci_dev->current_state;
int error;
/*
- * If pci_dev->driver is not set (unbound), we leave the device in D0,
+ * If pdrv is not set (unbound), we leave the device in D0,
* but it may go to D3cold when the bridge above it runtime suspends.
* Save its config space in case that happens.
*/
- if (!pci_dev->driver) {
+ if (!pdrv) {
pci_save_state(pci_dev);
return 0;
}
@@ -1279,6 +1280,7 @@ static int pci_pm_runtime_suspend(struct device *dev)
static int pci_pm_runtime_resume(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *pdrv = pci_driver_of_dev(pci_dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
pci_power_t prev_state = pci_dev->current_state;
int error = 0;
@@ -1290,7 +1292,7 @@ static int pci_pm_runtime_resume(struct device *dev)
*/
pci_restore_standard_config(pci_dev);
- if (!pci_dev->driver)
+ if (!pdrv)
return 0;
pci_fixup_device(pci_fixup_resume_early, pci_dev);
@@ -1310,13 +1312,14 @@ static int pci_pm_runtime_resume(struct device *dev)
static int pci_pm_runtime_idle(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct pci_driver *pdrv = pci_driver_of_dev(pci_dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
/*
- * If pci_dev->driver is not set (unbound), the device should
+ * If pdrv is not set (unbound), the device should
* always remain in D0 regardless of the runtime PM status
*/
- if (!pci_dev->driver)
+ if (!pdrv)
return 0;
if (!pm)
@@ -1423,8 +1426,9 @@ static struct pci_driver pci_compat_driver = {
*/
struct pci_driver *pci_dev_driver(const struct pci_dev *dev)
{
- if (dev->driver)
- return dev->driver;
+ struct pci_driver *pdrv = pci_driver_of_dev(dev);
+ if (pdrv)
+ return pdrv;
else {
int i;
for (i = 0; i <= PCI_ROM_RESOURCE; i++)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index aacf575c15cf..9565f6c1bd4f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -5069,11 +5069,12 @@ EXPORT_SYMBOL_GPL(pci_dev_unlock);
static void pci_dev_save_and_disable(struct pci_dev *dev)
{
+ struct pci_driver *pdrv = pci_driver_of_dev(dev);
const struct pci_error_handlers *err_handler =
- dev->driver ? dev->driver->err_handler : NULL;
+ pdrv ? pdrv->err_handler : NULL;
/*
- * dev->driver->err_handler->reset_prepare() is protected against
+ * pdrv->err_handler->reset_prepare() is protected against
* races with ->remove() by the device lock, which must be held by
* the caller.
*/
@@ -5100,13 +5101,14 @@ static void pci_dev_save_and_disable(struct pci_dev *dev)
static void pci_dev_restore(struct pci_dev *dev)
{
+ struct pci_driver *pdrv = pci_driver_of_dev(dev);
const struct pci_error_handlers *err_handler =
- dev->driver ? dev->driver->err_handler : NULL;
+ pdrv ? pdrv->err_handler : NULL;
pci_restore_state(dev);
/*
- * dev->driver->err_handler->reset_done() is protected against
+ * err_handler->reset_done() is protected against
* races with ->remove() by the device lock, which must be held by
* the caller.
*/
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index b576aa890c76..5b2b7b2972dd 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -51,12 +51,12 @@ static int report_error_detected(struct pci_dev *dev,
{
pci_ers_result_t vote;
const struct pci_error_handlers *err_handler;
+ struct pci_driver *pdrv = pci_driver_of_dev(dev);
device_lock(&dev->dev);
if (!pci_dev_set_io_state(dev, state) ||
- !dev->driver ||
- !dev->driver->err_handler ||
- !dev->driver->err_handler->error_detected) {
+ !pdrv || !pdrv->err_handler ||
+ !pdrv->err_handler->error_detected) {
/*
* If any device in the subtree does not have an error_detected
* callback, PCI_ERS_RESULT_NO_AER_DRIVER prevents subsequent
@@ -70,7 +70,7 @@ static int report_error_detected(struct pci_dev *dev,
vote = PCI_ERS_RESULT_NONE;
}
} else {
- err_handler = dev->driver->err_handler;
+ err_handler = pdrv->err_handler;
vote = err_handler->error_detected(dev, state);
}
pci_uevent_ers(dev, vote);
@@ -93,14 +93,15 @@ static int report_mmio_enabled(struct pci_dev *dev, void *data)
{
pci_ers_result_t vote, *result = data;
const struct pci_error_handlers *err_handler;
+ struct pci_driver *pdrv = pci_driver_of_dev(dev);
device_lock(&dev->dev);
- if (!dev->driver ||
- !dev->driver->err_handler ||
- !dev->driver->err_handler->mmio_enabled)
+ if (!pdrv ||
+ !pdrv->err_handler ||
+ !pdrv->err_handler->mmio_enabled)
goto out;
- err_handler = dev->driver->err_handler;
+ err_handler = pdrv->err_handler;
vote = err_handler->mmio_enabled(dev);
*result = merge_result(*result, vote);
out:
@@ -112,14 +113,15 @@ static int report_slot_reset(struct pci_dev *dev, void *data)
{
pci_ers_result_t vote, *result = data;
const struct pci_error_handlers *err_handler;
+ struct pci_driver *pdrv = pci_driver_of_dev(dev);
device_lock(&dev->dev);
- if (!dev->driver ||
- !dev->driver->err_handler ||
- !dev->driver->err_handler->slot_reset)
+ if (!pdrv ||
+ !pdrv->err_handler ||
+ !pdrv->err_handler->slot_reset)
goto out;
- err_handler = dev->driver->err_handler;
+ err_handler = pdrv->err_handler;
vote = err_handler->slot_reset(dev);
*result = merge_result(*result, vote);
out:
@@ -130,15 +132,16 @@ static int report_slot_reset(struct pci_dev *dev, void *data)
static int report_resume(struct pci_dev *dev, void *data)
{
const struct pci_error_handlers *err_handler;
+ struct pci_driver *pdrv = pci_driver_of_dev(dev);
device_lock(&dev->dev);
if (!pci_dev_set_io_state(dev, pci_channel_io_normal) ||
- !dev->driver ||
- !dev->driver->err_handler ||
- !dev->driver->err_handler->resume)
+ !pdrv ||
+ !pdrv->err_handler ||
+ !pdrv->err_handler->resume)
goto out;
- err_handler = dev->driver->err_handler;
+ err_handler = pdrv->err_handler;
err_handler->resume(dev);
out:
pci_uevent_ers(dev, PCI_ERS_RESULT_RECOVERED);
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 3c648e6cb8f8..fc3ffb6a8689 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -598,12 +598,11 @@ static pci_ers_result_t pcifront_common_process(int cmd,
result = PCI_ERS_RESULT_NONE;
pcidev = pci_get_domain_bus_and_slot(domain, bus, devfn);
- if (!pcidev || !pcidev->driver) {
+ if (!pcidev || !(pdrv = pci_driver_of_dev(pcidev))) {
dev_err(&pdev->xdev->dev, "device or AER driver is NULL\n");
pci_dev_put(pcidev);
return result;
}
- pdrv = pcidev->driver;
if (pdrv->err_handler && pdrv->err_handler->error_detected) {
pci_dbg(pcidev, "trying to call AER service\n");
diff --git a/drivers/ssb/pcihost_wrapper.c b/drivers/ssb/pcihost_wrapper.c
index 410215c16920..9cd3633498d3 100644
--- a/drivers/ssb/pcihost_wrapper.c
+++ b/drivers/ssb/pcihost_wrapper.c
@@ -68,6 +68,7 @@ static int ssb_pcihost_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct ssb_bus *ssb;
+ struct pci_driver *pdrv;
int err = -ENOMEM;
const char *name;
u32 val;
@@ -79,8 +80,10 @@ static int ssb_pcihost_probe(struct pci_dev *dev,
if (err)
goto err_kfree_ssb;
name = dev_name(&dev->dev);
- if (dev->driver && dev->driver->name)
- name = dev->driver->name;
+
+ pdrv = pci_driver_of_dev(dev);
+ if (pdrv && pdrv->name)
+ name = pdrv->name;
err = pci_request_regions(dev, name);
if (err)
goto err_pci_disable;
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 18c2bbddf080..d8a6ef602a46 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -100,10 +100,11 @@ static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
{
struct pci_dev *pdev = to_pci_dev(dev);
+ struct pci_driver *pdrv = pci_driver_of_dev(pdev);
struct xhci_driver_data *driver_data;
const struct pci_device_id *id;
- id = pci_match_id(pdev->driver->id_table, pdev);
+ id = pci_match_id(pdrv->id_table, pdev);
if (id && id->driver_data) {
driver_data = (struct xhci_driver_data *)id->driver_data;
--
2.30.2
On Tue, Aug 03, 2021 at 12:01:49PM +0200, Uwe Kleine-K?nig wrote:
> This prepares removing the driver member of struct pci_dev which holds the
> same information than struct pci_dev::dev->driver.
...
> + struct pci_driver *pdrv;
Missed blank line here and everywhere else. I don't remember if it's a
checkpatch who complains on this.
> + return (pdev && (pdrv = pci_driver_of_dev(pdev))) ? pdrv->name : "<null>";
--
With Best Regards,
Andy Shevchenko
On Tue, Aug 03, 2021 at 12:01:49PM +0200, Uwe Kleine-K?nig wrote:
> This prepares removing the driver member of struct pci_dev which holds the
> same information than struct pci_dev::dev->driver.
>
> Signed-off-by: Uwe Kleine-K?nig <[email protected]>
> ---
> arch/powerpc/include/asm/ppc-pci.h | 3 +-
> arch/powerpc/kernel/eeh_driver.c | 12 ++++---
> arch/x86/events/intel/uncore.c | 2 +-
> arch/x86/kernel/probe_roms.c | 2 +-
> drivers/bcma/host_pci.c | 6 ++--
> drivers/crypto/hisilicon/qm.c | 2 +-
> drivers/crypto/qat/qat_common/adf_aer.c | 2 +-
> drivers/message/fusion/mptbase.c | 4 +--
> drivers/misc/cxl/guest.c | 21 +++++------
> drivers/misc/cxl/pci.c | 25 +++++++------
> .../ethernet/hisilicon/hns3/hns3_ethtool.c | 2 +-
> .../ethernet/marvell/prestera/prestera_pci.c | 2 +-
> drivers/net/ethernet/mellanox/mlxsw/pci.c | 2 +-
> .../ethernet/netronome/nfp/nfp_net_ethtool.c | 2 +-
> drivers/pci/iov.c | 23 +++++++-----
> drivers/pci/pci-driver.c | 28 ++++++++-------
> drivers/pci/pci.c | 10 +++---
> drivers/pci/pcie/err.c | 35 ++++++++++---------
> drivers/pci/xen-pcifront.c | 3 +-
> drivers/ssb/pcihost_wrapper.c | 7 ++--
> drivers/usb/host/xhci-pci.c | 3 +-
> 21 files changed, 112 insertions(+), 84 deletions(-)
For mlxsw:
Tested-by: Ido Schimmel <[email protected]>
On 3/8/21 8:01 pm, Uwe Kleine-König wrote:
> This prepares removing the driver member of struct pci_dev which holds the
> same information than struct pci_dev::dev->driver.
>
> Signed-off-by: Uwe Kleine-König <[email protected]>
cxl hunks look alright.
Acked-by: Andrew Donnellan <[email protected]> # cxl
--
Andrew Donnellan OzLabs, ADL Canberra
[email protected] IBM Australia Limited
On Fri, Aug 06, 2021 at 08:46:23AM +0200, Uwe Kleine-K?nig wrote:
> On Thu, Aug 05, 2021 at 06:42:34PM -0500, Bjorn Helgaas wrote:
> > I looked at all the bus_type.probe() methods, it looks like pci_dev is
> > not the only offender here. At least the following also have a driver
> > pointer in the device struct:
> >
> > parisc_device.driver
> > acpi_device.driver
> > dio_dev.driver
> > hid_device.driver
> > pci_dev.driver
> > pnp_dev.driver
> > rio_dev.driver
> > zorro_dev.driver
>
> Right, when I converted zorro_dev it was pointed out that the code was
> copied from pci and the latter has the same construct. :-)
> See
> https://lore.kernel.org/r/[email protected]
> for the patch, I don't find where pci was pointed out, maybe it was on
> irc only.
Oh, thanks! I looked to see if you'd done something similar
elsewhere, but I missed this one.
> > Looking through the places that care about pci_dev.driver (the ones
> > updated by patch 5/6), many of them are ... a little dubious to begin
> > with. A few need the "struct pci_error_handlers *err_handler"
> > pointer, so that's probably legitimate. But many just need a name,
> > and should probably be using dev_driver_string() instead.
>
> Yeah, I considered adding a function to get the driver name from a
> pci_dev and a function to get the error handlers. Maybe it's an idea to
> introduce these two and then use to_pci_driver(pdev->dev.driver) for the
> few remaining users? Maybe doing that on top of my current series makes
> sense to have a clean switch from pdev->driver to pdev->dev.driver?!
I'd propose using dev_driver_string() for these places:
eeh_driver_name() (could change callers to use dev_driver_string())
bcma_host_pci_probe()
qm_alloc_uacce()
hns3_get_drvinfo()
prestera_pci_probe()
mlxsw_pci_probe()
nfp_get_drvinfo()
ssb_pcihost_probe()
The use in mpt_device_driver_register() looks unnecessary: it's only
to get a struct pci_device_id *, which is passed to ->probe()
functions that don't need it.
The use in adf_enable_aer() looks wrong: it sets the err_handler
pointer in one of the adf_driver structs. I think those structs
should be basically immutable, and the drivers that call
adf_enable_aer() from their .probe() methods should set
".err_handler = &adf_err_handler" in their static adf_driver
definitions instead.
I think that basically leaves these:
uncore_pci_probe() # .id_table, custom driver "registration"
match_id() # .id_table, arch/x86/kernel/probe_roms.c
xhci_pci_quirks() # .id_table
pci_error_handlers() # roll-your-own AER handling, drivers/misc/cxl/guest.c
I think it would be fine to use to_pci_driver(pdev->dev.driver) for
these few.
Bjorn