[PATCH 2/2] scsi: aacraid: change event_wait to a completion

Arnd Bergmann
2018-12-10T21:33:52Z

The event_wait semaphore has completion semantics, so we can
change it over to the completion interface for clarity without
changing the behavior.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/scsi/aacraid/aacraid.h | 3 ++-
drivers/scsi/aacraid/commctrl.c | 1 -
drivers/scsi/aacraid/commsup.c | 15 +++++++--------
drivers/scsi/aacraid/dpcsup.c | 19 +++++++++----------
drivers/scsi/aacraid/linit.c | 2 +-
drivers/scsi/aacraid/src.c | 2 +-
6 files changed, 20 insertions(+), 22 deletions(-)

diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index 531a0b9a58f8..3291d1c16864 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -40,6 +40,7 @@
#define nblank(x) _nblank(x)[0]

#include <linux/interrupt.h>
+#include <linux/completion.h>
#include <linux/pci.h>
#include <scsi/scsi_host.h>

@@ -1313,7 +1314,7 @@ struct fib {
* This is the event the sendfib routine will wait on if the
* caller did not pass one and this is synch io.
*/
- struct semaphore event_wait;
+ struct completion event_wait;
spinlock_t event_lock;

u32 done; /* gets set to 1 when fib is complete */
diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index 6a6ad9477786..e2899ff7913e 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -41,7 +41,6 @@
#include <linux/blkdev.h>
#include <linux/delay.h> /* ssleep prototype */
#include <linux/kthread.h>
-#include <linux/semaphore.h>
#include <linux/uaccess.h>
#include <scsi/scsi_host.h>

diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index 7ed51a77e39d..d5a6aa9676c8 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -44,7 +44,6 @@
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/interrupt.h>
-#include <linux/semaphore.h>
#include <linux/bcd.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
@@ -189,7 +188,7 @@ int aac_fib_setup(struct aac_dev * dev)
fibptr->hw_fib_va = hw_fib;
fibptr->data = (void *) fibptr->hw_fib_va->data;
fibptr->next = fibptr+1; /* Forward chain the fibs */
- sema_init(&fibptr->event_wait, 0);
+ init_completion(&fibptr->event_wait);
spin_lock_init(&fibptr->event_lock);
hw_fib->header.XferState = cpu_to_le32(0xffffffff);
hw_fib->header.SenderSize =
@@ -623,7 +622,7 @@ int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
}
if (wait) {
fibptr->flags |= FIB_CONTEXT_FLAG_WAIT;
- if (down_interruptible(&fibptr->event_wait)) {
+ if (wait_for_completion_interruptible(&fibptr->event_wait)) {
fibptr->flags &= ~FIB_CONTEXT_FLAG_WAIT;
return -EFAULT;
}
@@ -659,7 +658,7 @@ int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
* hardware failure has occurred.
*/
unsigned long timeout = jiffies + (180 * HZ); /* 3 minutes */
- while (down_trylock(&fibptr->event_wait)) {
+ while (!try_wait_for_completion(&fibptr->event_wait)) {
int blink;
if (time_is_before_eq_jiffies(timeout)) {
struct aac_queue * q = &dev->queues->queue[AdapNormCmdQueue];
@@ -689,9 +688,9 @@ int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
*/
schedule();
}
- } else if (down_interruptible(&fibptr->event_wait)) {
+ } else if (wait_for_completion_interruptible(&fibptr->event_wait)) {
/* Do nothing ... satisfy
- * down_interruptible must_check */
+ * wait_for_completion_interruptible must_check */
}

spin_lock_irqsave(&fibptr->event_lock, flags);
@@ -777,7 +776,7 @@ int aac_hba_send(u8 command, struct fib *fibptr, fib_callback callback,
return -EFAULT;

fibptr->flags |= FIB_CONTEXT_FLAG_WAIT;
- if (down_interruptible(&fibptr->event_wait))
+ if (wait_for_completion_interruptible(&fibptr->event_wait))
fibptr->done = 2;
fibptr->flags &= ~(FIB_CONTEXT_FLAG_WAIT);

@@ -1538,7 +1537,7 @@ static int _aac_reset_adapter(struct aac_dev *aac, int forced, u8 reset_type)
|| fib->flags & FIB_CONTEXT_FLAG_WAIT) {
unsigned long flagv;
spin_lock_irqsave(&fib->event_lock, flagv);
- up(&fib->event_wait);
+ complete(&fib->event_wait);
spin_unlock_irqrestore(&fib->event_lock, flagv);
schedule();
retval = 0;
diff --git a/drivers/scsi/aacraid/dpcsup.c b/drivers/scsi/aacraid/dpcsup.c
index ddc69738375f..40a771dd1c0e 100644
--- a/drivers/scsi/aacraid/dpcsup.c
+++ b/drivers/scsi/aacraid/dpcsup.c
@@ -38,7 +38,6 @@
#include <linux/slab.h>
#include <linux/completion.h>
#include <linux/blkdev.h>
-#include <linux/semaphore.h>

#include "aacraid.h"

@@ -129,7 +128,7 @@ unsigned int aac_response_normal(struct aac_queue * q)
spin_lock_irqsave(&fib->event_lock, flagv);
if (!fib->done) {
fib->done = 1;
- up(&fib->event_wait);
+ complete(&fib->event_wait);
}
spin_unlock_irqrestore(&fib->event_lock, flagv);

@@ -376,16 +375,16 @@ unsigned int aac_intr_normal(struct aac_dev *dev, u32 index, int isAif,
start_callback = 1;
} else {
unsigned long flagv;
- int complete = 0;
+ int completed = 0;

dprintk((KERN_INFO "event_wait up\n"));
spin_lock_irqsave(&fib->event_lock, flagv);
if (fib->done == 2) {
fib->done = 1;
- complete = 1;
+ completed = 1;
} else {
fib->done = 1;
- up(&fib->event_wait);
+ complete(&fib->event_wait);
}
spin_unlock_irqrestore(&fib->event_lock, flagv);

@@ -395,7 +394,7 @@ unsigned int aac_intr_normal(struct aac_dev *dev, u32 index, int isAif,
mflags);

FIB_COUNTER_INCREMENT(aac_config.NativeRecved);
- if (complete)
+ if (completed)
aac_fib_complete(fib);
}
} else {
@@ -428,16 +427,16 @@ unsigned int aac_intr_normal(struct aac_dev *dev, u32 index, int isAif,
start_callback = 1;
} else {
unsigned long flagv;
- int complete = 0;
+ int completed = 0;

dprintk((KERN_INFO "event_wait up\n"));
spin_lock_irqsave(&fib->event_lock, flagv);
if (fib->done == 2) {
fib->done = 1;
- complete = 1;
+ completed = 1;
} else {
fib->done = 1;
- up(&fib->event_wait);
+ complete(&fib->event_wait);
}
spin_unlock_irqrestore(&fib->event_lock, flagv);

@@ -447,7 +446,7 @@ unsigned int aac_intr_normal(struct aac_dev *dev, u32 index, int isAif,
mflags);

FIB_COUNTER_INCREMENT(aac_config.NormalRecved);
- if (complete)
+ if (completed)
aac_fib_complete(fib);
}
}
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 42defee90eb2..1c5d54c2f031 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1560,7 +1560,7 @@ static void __aac_shutdown(struct aac_dev * aac)
struct fib *fib = &aac->fibs[i];
if (!(fib->hw_fib_va->header.XferState & cpu_to_le32(NoResponseExpected | Async)) &&
(fib->hw_fib_va->header.XferState & cpu_to_le32(ResponseExpected)))
- up(&fib->event_wait);
+ complete(&fib->event_wait);
}
kthread_stop(aac->thread);
aac->thread = NULL;
diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c
index 7a51ccfa8662..8377aec0649d 100644
--- a/drivers/scsi/aacraid/src.c
+++ b/drivers/scsi/aacraid/src.c
@@ -106,7 +106,7 @@ static irqreturn_t aac_src_intr_message(int irq, void *dev_id)
spin_lock_irqsave(&dev->sync_fib->event_lock, sflags);
if (dev->sync_fib->flags & FIB_CONTEXT_FLAG_WAIT) {
dev->management_fib_count--;
- up(&dev->sync_fib->event_wait);
+ complete(&dev->sync_fib->event_wait);
}
spin_unlock_irqrestore(&dev->sync_fib->event_lock,
sflags);
--
2.20.0