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[SCSI] aha152x: use wait_for_completion_timeout 

Use wait_for_completion_timeout instead a semaphore + timer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Christoph Hellwig 2007-05-13 17:52:12 +02:00 committed by James Bottomley
parent 1dfcda06a6
commit 0f06bb34f2
1 changed files with 18 additions and 32 deletions
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50
drivers/scsi/aha152x.c
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@ -240,6 +240,7 @@
#include <linux/io.h> #include <linux/io.h>
#include <linux/blkdev.h> #include <linux/blkdev.h>
#include <asm/system.h> #include <asm/system.h>
#include <linux/completion.h>
#include <linux/errno.h> #include <linux/errno.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/wait.h> #include <linux/wait.h>
@ -253,7 +254,6 @@
#include <linux/spinlock.h> #include <linux/spinlock.h>
#include <linux/workqueue.h> #include <linux/workqueue.h>
#include <linux/list.h> #include <linux/list.h>
#include <asm/semaphore.h>
#include <scsi/scsicam.h> #include <scsi/scsicam.h>
#include "scsi.h" #include "scsi.h"
@ -551,7 +551,7 @@ struct aha152x_hostdata {
*/ */
struct aha152x_scdata { struct aha152x_scdata {
Scsi_Cmnd *next; /* next sc in queue */ Scsi_Cmnd *next; /* next sc in queue */
struct semaphore *sem; /* semaphore to block on */ struct completion *done;/* semaphore to block on */
unsigned char cmd_len; unsigned char cmd_len;
unsigned char cmnd[MAX_COMMAND_SIZE]; unsigned char cmnd[MAX_COMMAND_SIZE];
unsigned short use_sg; unsigned short use_sg;
@ -608,7 +608,7 @@ struct aha152x_scdata {
#define SCDATA(SCpnt) ((struct aha152x_scdata *) (SCpnt)->host_scribble) #define SCDATA(SCpnt) ((struct aha152x_scdata *) (SCpnt)->host_scribble)
#define SCNEXT(SCpnt) SCDATA(SCpnt)->next #define SCNEXT(SCpnt) SCDATA(SCpnt)->next
#define SCSEM(SCpnt) SCDATA(SCpnt)->sem #define SCSEM(SCpnt) SCDATA(SCpnt)->done
#define SG_ADDRESS(buffer) ((char *) (page_address((buffer)->page)+(buffer)->offset)) #define SG_ADDRESS(buffer) ((char *) (page_address((buffer)->page)+(buffer)->offset))
@ -969,7 +969,8 @@ static int setup_expected_interrupts(struct Scsi_Host *shpnt)
/* /*
* Queue a command and setup interrupts for a free bus. * Queue a command and setup interrupts for a free bus.
*/ */
static int aha152x_internal_queue(Scsi_Cmnd *SCpnt, struct semaphore *sem, int phase, void (*done)(Scsi_Cmnd *)) static int aha152x_internal_queue(Scsi_Cmnd *SCpnt, struct completion *complete,
int phase, void (*done)(Scsi_Cmnd *))
{ {
struct Scsi_Host *shpnt = SCpnt->device->host; struct Scsi_Host *shpnt = SCpnt->device->host;
unsigned long flags; unsigned long flags;
@ -1013,7 +1014,7 @@ static int aha152x_internal_queue(Scsi_Cmnd *SCpnt, struct semaphore *sem, int p
} }
SCNEXT(SCpnt) = NULL; SCNEXT(SCpnt) = NULL;
SCSEM(SCpnt) = sem; SCSEM(SCpnt) = complete;
/* setup scratch area /* setup scratch area
SCp.ptr : buffer pointer SCp.ptr : buffer pointer
@ -1084,9 +1085,9 @@ static void reset_done(Scsi_Cmnd *SCpnt)
DPRINTK(debug_eh, INFO_LEAD "reset_done called\n", CMDINFO(SCpnt)); DPRINTK(debug_eh, INFO_LEAD "reset_done called\n", CMDINFO(SCpnt));
#endif #endif
if(SCSEM(SCpnt)) { if(SCSEM(SCpnt)) {
up(SCSEM(SCpnt)); complete(SCSEM(SCpnt));
} else { } else {
printk(KERN_ERR "aha152x: reset_done w/o semaphore\n"); printk(KERN_ERR "aha152x: reset_done w/o completion\n");
} }
} }
@ -1139,21 +1140,6 @@ static int aha152x_abort(Scsi_Cmnd *SCpnt)
return FAILED; return FAILED;
} }
static void timer_expired(unsigned long p)
{
Scsi_Cmnd *SCp = (Scsi_Cmnd *)p;
struct semaphore *sem = SCSEM(SCp);
struct Scsi_Host *shpnt = SCp->device->host;
unsigned long flags;
/* remove command from issue queue */
DO_LOCK(flags);
remove_SC(&ISSUE_SC, SCp);
DO_UNLOCK(flags);
up(sem);
}
/* /*
* Reset a device * Reset a device
* *
@ -1161,14 +1147,14 @@ static void timer_expired(unsigned long p)
static int aha152x_device_reset(Scsi_Cmnd * SCpnt) static int aha152x_device_reset(Scsi_Cmnd * SCpnt)
{ {
struct Scsi_Host *shpnt = SCpnt->device->host; struct Scsi_Host *shpnt = SCpnt->device->host;
DECLARE_MUTEX_LOCKED(sem); DECLARE_COMPLETION(done);
struct timer_list timer;
int ret, issued, disconnected; int ret, issued, disconnected;
unsigned char old_cmd_len = SCpnt->cmd_len; unsigned char old_cmd_len = SCpnt->cmd_len;
unsigned short old_use_sg = SCpnt->use_sg; unsigned short old_use_sg = SCpnt->use_sg;
void *old_buffer = SCpnt->request_buffer; void *old_buffer = SCpnt->request_buffer;
unsigned old_bufflen = SCpnt->request_bufflen; unsigned old_bufflen = SCpnt->request_bufflen;
unsigned long flags; unsigned long flags;
unsigned long timeleft;
#if defined(AHA152X_DEBUG) #if defined(AHA152X_DEBUG)
if(HOSTDATA(shpnt)->debug & debug_eh) { if(HOSTDATA(shpnt)->debug & debug_eh) {
@ -1192,15 +1178,15 @@ static int aha152x_device_reset(Scsi_Cmnd * SCpnt)
SCpnt->request_buffer = NULL; SCpnt->request_buffer = NULL;
SCpnt->request_bufflen = 0; SCpnt->request_bufflen = 0;
init_timer(&timer); aha152x_internal_queue(SCpnt, &done, resetting, reset_done);
timer.data = (unsigned long) SCpnt;
timer.expires = jiffies + 100*HZ; /* 10s */
timer.function = (void (*)(unsigned long)) timer_expired;
aha152x_internal_queue(SCpnt, &sem, resetting, reset_done); timeleft = wait_for_completion_timeout(&done, 100*HZ);
add_timer(&timer); if (!timeleft) {
down(&sem); /* remove command from issue queue */
del_timer(&timer); DO_LOCK(flags);
remove_SC(&ISSUE_SC, SCpnt);
DO_UNLOCK(flags);
}
SCpnt->cmd_len = old_cmd_len; SCpnt->cmd_len = old_cmd_len;
SCpnt->use_sg = old_use_sg; SCpnt->use_sg = old_use_sg;