2021-12-06 22:52:23

by Thomas Gleixner

Subject: [patch V2 09/31] PCI/MSI: Let core code free MSI descriptors

Set the domain info flag which tells the core code to free the MSI
descriptors from msi_domain_free_irqs() and add an explicit call to the
core function into the legacy code.

Signed-off-by: Thomas Gleixner <[email protected]>
---
drivers/pci/msi/irqdomain.c | 3 ++-
drivers/pci/msi/legacy.c | 1 +
drivers/pci/msi/msi.c | 14 --------------
3 files changed, 3 insertions(+), 15 deletions(-)

--- a/drivers/pci/msi/irqdomain.c
+++ b/drivers/pci/msi/irqdomain.c
@@ -171,7 +171,8 @@ struct irq_domain *pci_msi_create_irq_do
if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
pci_msi_domain_update_chip_ops(info);

- info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS;
+ info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS |
+ MSI_FLAG_FREE_MSI_DESCS;
if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE))
info->flags |= MSI_FLAG_MUST_REACTIVATE;

--- a/drivers/pci/msi/legacy.c
+++ b/drivers/pci/msi/legacy.c
@@ -80,4 +80,5 @@ void pci_msi_legacy_teardown_msi_irqs(st
{
msi_device_destroy_sysfs(&dev->dev);
arch_teardown_msi_irqs(dev);
+ msi_free_msi_descs(&dev->dev);
}
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -224,22 +224,8 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg);

static void free_msi_irqs(struct pci_dev *dev)
{
- struct list_head *msi_list = dev_to_msi_list(&dev->dev);
- struct msi_desc *entry, *tmp;
- int i;
-
- for_each_pci_msi_entry(entry, dev)
- if (entry->irq)
- for (i = 0; i < entry->nvec_used; i++)
- BUG_ON(irq_has_action(entry->irq + i));
-
pci_msi_teardown_msi_irqs(dev);

- list_for_each_entry_safe(entry, tmp, msi_list, list) {
- list_del(&entry->list);
- free_msi_entry(entry);
- }
-
if (dev->msix_base) {
iounmap(dev->msix_base);
dev->msix_base = NULL;

2021-12-07 21:07:45

by Bjorn Helgaas

Subject: Re: [patch V2 09/31] PCI/MSI: Let core code free MSI descriptors

On Mon, Dec 06, 2021 at 11:51:16PM +0100, Thomas Gleixner wrote:
> Set the domain info flag which tells the core code to free the MSI
> descriptors from msi_domain_free_irqs() and add an explicit call to the
> core function into the legacy code.
>
> Signed-off-by: Thomas Gleixner <[email protected]>

Acked-by: Bjorn Helgaas <[email protected]>

> ---
> drivers/pci/msi/irqdomain.c | 3 ++-
> drivers/pci/msi/legacy.c | 1 +
> drivers/pci/msi/msi.c | 14 --------------
> 3 files changed, 3 insertions(+), 15 deletions(-)
>
> --- a/drivers/pci/msi/irqdomain.c
> +++ b/drivers/pci/msi/irqdomain.c
> @@ -171,7 +171,8 @@ struct irq_domain *pci_msi_create_irq_do
> if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
> pci_msi_domain_update_chip_ops(info);
>
> - info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS;
> + info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS |
> + MSI_FLAG_FREE_MSI_DESCS;
> if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE))
> info->flags |= MSI_FLAG_MUST_REACTIVATE;
>
> --- a/drivers/pci/msi/legacy.c
> +++ b/drivers/pci/msi/legacy.c
> @@ -80,4 +80,5 @@ void pci_msi_legacy_teardown_msi_irqs(st
> {
> msi_device_destroy_sysfs(&dev->dev);
> arch_teardown_msi_irqs(dev);
> + msi_free_msi_descs(&dev->dev);
> }
> --- a/drivers/pci/msi/msi.c
> +++ b/drivers/pci/msi/msi.c
> @@ -224,22 +224,8 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg);
>
> static void free_msi_irqs(struct pci_dev *dev)
> {
> - struct list_head *msi_list = dev_to_msi_list(&dev->dev);
> - struct msi_desc *entry, *tmp;
> - int i;
> -
> - for_each_pci_msi_entry(entry, dev)
> - if (entry->irq)
> - for (i = 0; i < entry->nvec_used; i++)
> - BUG_ON(irq_has_action(entry->irq + i));
> -
> pci_msi_teardown_msi_irqs(dev);
>
> - list_for_each_entry_safe(entry, tmp, msi_list, list) {
> - list_del(&entry->list);
> - free_msi_entry(entry);
> - }
> -
> if (dev->msix_base) {
> iounmap(dev->msix_base);
> dev->msix_base = NULL;
>

2021-12-16 21:41:28

by tip-bot2 for Alexey Makhalov

Subject: [tip: irq/msi] PCI/MSI: Let core code free MSI descriptors

The following commit has been merged into the irq/msi branch of tip:

Commit-ID: 9fb9eb4b59acc607e978288c96ac7efa917153d4
Gitweb: https://git.kernel.org/tip/9fb9eb4b59acc607e978288c96ac7efa917153d4
Author: Thomas Gleixner <[email protected]>
AuthorDate: Mon, 06 Dec 2021 23:51:16 +01:00
Committer: Thomas Gleixner <[email protected]>
CommitterDate: Thu, 16 Dec 2021 22:22:17 +01:00

PCI/MSI: Let core code free MSI descriptors

Set the domain info flag which tells the core code to free the MSI
descriptors from msi_domain_free_irqs() and add an explicit call to the
core function into the legacy code.

Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Michael Kelley <[email protected]>
Tested-by: Nishanth Menon <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Acked-by: Bjorn Helgaas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

---
drivers/pci/msi/irqdomain.c | 3 ++-
drivers/pci/msi/legacy.c | 1 +
drivers/pci/msi/msi.c | 14 --------------
3 files changed, 3 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c
index c81793a..3aab617 100644
--- a/drivers/pci/msi/irqdomain.c
+++ b/drivers/pci/msi/irqdomain.c
@@ -171,7 +171,8 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode,
if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
pci_msi_domain_update_chip_ops(info);

- info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS;
+ info->flags |= MSI_FLAG_ACTIVATE_EARLY | MSI_FLAG_DEV_SYSFS |
+ MSI_FLAG_FREE_MSI_DESCS;
if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE))
info->flags |= MSI_FLAG_MUST_REACTIVATE;

diff --git a/drivers/pci/msi/legacy.c b/drivers/pci/msi/legacy.c
index 773f351..91c20a3 100644
--- a/drivers/pci/msi/legacy.c
+++ b/drivers/pci/msi/legacy.c
@@ -80,4 +80,5 @@ void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev)
{
msi_device_destroy_sysfs(&dev->dev);
arch_teardown_msi_irqs(dev);
+ msi_free_msi_descs(&dev->dev);
}
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index 4ee47ee..95db9c3 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -224,22 +224,8 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg);

static void free_msi_irqs(struct pci_dev *dev)
{
- struct list_head *msi_list = dev_to_msi_list(&dev->dev);
- struct msi_desc *entry, *tmp;
- int i;
-
- for_each_pci_msi_entry(entry, dev)
- if (entry->irq)
- for (i = 0; i < entry->nvec_used; i++)
- BUG_ON(irq_has_action(entry->irq + i));
-
pci_msi_teardown_msi_irqs(dev);

- list_for_each_entry_safe(entry, tmp, msi_list, list) {
- list_del(&entry->list);
- free_msi_entry(entry);
- }
-
if (dev->msix_base) {
iounmap(dev->msix_base);
dev->msix_base = NULL;