These are a set of patches which removes semaphores from esas2r.
These are part of a bigger effort to eliminate unwanted semaphores
from the linux kernel.
Binoy Jayan (2):
scsi: esas2r: Replace semaphore fm_api_semaphore with mutex
scsi: esas2r: Replace semaphore fs_api_semaphore with mutex
drivers/scsi/esas2r/esas2r.h | 4 ++--
drivers/scsi/esas2r/esas2r_init.c | 4 ++--
drivers/scsi/esas2r/esas2r_ioctl.c | 10 +++++-----
3 files changed, 9 insertions(+), 9 deletions(-)
--
Binoy Jayan
The semaphore 'fm_api_semaphore' is used as a simple mutex, so
it should be written as one. Semaphores are going away in the future.
Signed-off-by: Binoy Jayan <[email protected]>
---
drivers/scsi/esas2r/esas2r.h | 2 +-
drivers/scsi/esas2r/esas2r_init.c | 2 +-
drivers/scsi/esas2r/esas2r_ioctl.c | 4 ++--
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/scsi/esas2r/esas2r.h b/drivers/scsi/esas2r/esas2r.h
index b6030e3..c5013de 100644
--- a/drivers/scsi/esas2r/esas2r.h
+++ b/drivers/scsi/esas2r/esas2r.h
@@ -945,7 +945,7 @@ struct esas2r_adapter {
struct list_head vrq_mds_head;
struct esas2r_mem_desc *vrq_mds;
int num_vrqs;
- struct semaphore fm_api_semaphore;
+ struct mutex fm_api_mutex;
struct semaphore fs_api_semaphore;
struct semaphore nvram_semaphore;
struct atto_ioctl *local_atto_ioctl;
diff --git a/drivers/scsi/esas2r/esas2r_init.c b/drivers/scsi/esas2r/esas2r_init.c
index 6432a50..ad85b33 100644
--- a/drivers/scsi/esas2r/esas2r_init.c
+++ b/drivers/scsi/esas2r/esas2r_init.c
@@ -327,7 +327,7 @@ int esas2r_init_adapter(struct Scsi_Host *host, struct pci_dev *pcid,
esas2r_debug("new adapter %p, name %s", a, a->name);
spin_lock_init(&a->request_lock);
spin_lock_init(&a->fw_event_lock);
- sema_init(&a->fm_api_semaphore, 1);
+ mutex_init(&a->fm_api_mutex);
sema_init(&a->fs_api_semaphore, 1);
sema_init(&a->nvram_semaphore, 1);
diff --git a/drivers/scsi/esas2r/esas2r_ioctl.c b/drivers/scsi/esas2r/esas2r_ioctl.c
index 2d4b7f0..c6b041a 100644
--- a/drivers/scsi/esas2r/esas2r_ioctl.c
+++ b/drivers/scsi/esas2r/esas2r_ioctl.c
@@ -110,7 +110,7 @@ static void do_fm_api(struct esas2r_adapter *a, struct esas2r_flash_img *fi)
{
struct esas2r_request *rq;
- if (down_interruptible(&a->fm_api_semaphore)) {
+ if (mutex_lock_interruptible(&a->fm_api_mutex)) {
fi->status = FI_STAT_BUSY;
return;
}
@@ -173,7 +173,7 @@ static void do_fm_api(struct esas2r_adapter *a, struct esas2r_flash_img *fi)
free_req:
esas2r_free_request(a, (struct esas2r_request *)rq);
free_sem:
- up(&a->fm_api_semaphore);
+ mutex_unlock(&a->fm_api_mutex);
return;
}
--
Binoy Jayan
The semaphore 'fs_api_semaphore' is used as a simple mutex, so
it should be written as one. Semaphores are going away in the future.
Signed-off-by: Binoy Jayan <[email protected]>
---
drivers/scsi/esas2r/esas2r.h | 2 +-
drivers/scsi/esas2r/esas2r_init.c | 2 +-
drivers/scsi/esas2r/esas2r_ioctl.c | 6 +++---
3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/scsi/esas2r/esas2r.h b/drivers/scsi/esas2r/esas2r.h
index c5013de..1da6407 100644
--- a/drivers/scsi/esas2r/esas2r.h
+++ b/drivers/scsi/esas2r/esas2r.h
@@ -946,7 +946,7 @@ struct esas2r_adapter {
struct esas2r_mem_desc *vrq_mds;
int num_vrqs;
struct mutex fm_api_mutex;
- struct semaphore fs_api_semaphore;
+ struct mutex fs_api_mutex;
struct semaphore nvram_semaphore;
struct atto_ioctl *local_atto_ioctl;
u8 fw_coredump_buff[ESAS2R_FWCOREDUMP_SZ];
diff --git a/drivers/scsi/esas2r/esas2r_init.c b/drivers/scsi/esas2r/esas2r_init.c
index ad85b33..5b14dd2 100644
--- a/drivers/scsi/esas2r/esas2r_init.c
+++ b/drivers/scsi/esas2r/esas2r_init.c
@@ -328,7 +328,7 @@ int esas2r_init_adapter(struct Scsi_Host *host, struct pci_dev *pcid,
spin_lock_init(&a->request_lock);
spin_lock_init(&a->fw_event_lock);
mutex_init(&a->fm_api_mutex);
- sema_init(&a->fs_api_semaphore, 1);
+ mutex_init(&a->fs_api_mutex);
sema_init(&a->nvram_semaphore, 1);
esas2r_fw_event_off(a);
diff --git a/drivers/scsi/esas2r/esas2r_ioctl.c b/drivers/scsi/esas2r/esas2r_ioctl.c
index c6b041a..9762300 100644
--- a/drivers/scsi/esas2r/esas2r_ioctl.c
+++ b/drivers/scsi/esas2r/esas2r_ioctl.c
@@ -1962,7 +1962,7 @@ int esas2r_read_fs(struct esas2r_adapter *a, char *buf, long off, int count)
(struct esas2r_ioctl_fs *)a->fs_api_buffer;
/* If another flash request is already in progress, return. */
- if (down_interruptible(&a->fs_api_semaphore)) {
+ if (mutex_lock_interruptible(&a->fs_api_mutex)) {
busy:
fs->status = ATTO_STS_OUT_OF_RSRC;
return -EBUSY;
@@ -1978,7 +1978,7 @@ int esas2r_read_fs(struct esas2r_adapter *a, char *buf, long off, int count)
rq = esas2r_alloc_request(a);
if (rq == NULL) {
esas2r_debug("esas2r_read_fs: out of requests");
- up(&a->fs_api_semaphore);
+ mutex_unlock(&a->fs_api_mutex);
goto busy;
}
@@ -2006,7 +2006,7 @@ int esas2r_read_fs(struct esas2r_adapter *a, char *buf, long off, int count)
;
dont_wait:
/* Free the request and keep going */
- up(&a->fs_api_semaphore);
+ mutex_unlock(&a->fs_api_mutex);
esas2r_free_request(a, (struct esas2r_request *)rq);
/* Pick up possible error code from above */
--
Binoy Jayan
On Thu, Jun 8, 2017 at 12:07 PM, Binoy Jayan <[email protected]> wrote:
> These are a set of patches which removes semaphores from esas2r.
> These are part of a bigger effort to eliminate unwanted semaphores
> from the linux kernel.
>
> Binoy Jayan (2):
> scsi: esas2r: Replace semaphore fm_api_semaphore with mutex
> scsi: esas2r: Replace semaphore fs_api_semaphore with mutex
Both conversions looks good. I think the interruption is not handled
correctly here, but your patch doesn't change that.
Reviewed-by: Arnd Bergmann <[email protected]>
Binoy,
> These are a set of patches which removes semaphores from esas2r.
> These are part of a bigger effort to eliminate unwanted semaphores
> from the linux kernel.
Applied to 4.13/scsi-queue.
--
Martin K. Petersen Oracle Linux Engineering