iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[SCSI] aha152x: use wait_for_completion_timeout

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
drivers/scsi/aha152x.c
View File

@ -240,6 +240,7 @@
#include <linux/io.h>
#include <linux/blkdev.h>
#include <asm/system.h>
#include <linux/completion.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/wait.h>
@ -253,7 +254,6 @@
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/list.h>
#include <asm/semaphore.h>
#include <scsi/scsicam.h>
#include "scsi.h"
@ -551,7 +551,7 @@ struct aha152x_hostdata {
*/
struct aha152x_scdata {
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 cmnd[MAX_COMMAND_SIZE];
unsigned short use_sg;
@ -608,7 +608,7 @@ struct aha152x_scdata {
#define SCDATA(SCpnt) ((struct aha152x_scdata *) (SCpnt)->host_scribble)
#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))
@ -969,7 +969,8 @@ static int setup_expected_interrupts(struct Scsi_Host *shpnt)
/*
* 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;
unsigned long flags;
@ -1013,7 +1014,7 @@ static int aha152x_internal_queue(Scsi_Cmnd *SCpnt, struct semaphore *sem, int p
}
SCNEXT(SCpnt) = NULL;
SCSEM(SCpnt) = sem;
SCSEM(SCpnt) = complete;
/* setup scratch area
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));
#endif
if(SCSEM(SCpnt)) {
up(SCSEM(SCpnt));
complete(SCSEM(SCpnt));
} 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;
}
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
*
@ -1161,14 +1147,14 @@ static void timer_expired(unsigned long p)
static int aha152x_device_reset(Scsi_Cmnd * SCpnt)
{
struct Scsi_Host *shpnt = SCpnt->device->host;
DECLARE_MUTEX_LOCKED(sem);
struct timer_list timer;
DECLARE_COMPLETION(done);
int ret, issued, disconnected;
unsigned char old_cmd_len = SCpnt->cmd_len;
unsigned short old_use_sg = SCpnt->use_sg;
void *old_buffer = SCpnt->request_buffer;
unsigned old_bufflen = SCpnt->request_bufflen;
unsigned long flags;
unsigned long timeleft;
#if defined(AHA152X_DEBUG)
if(HOSTDATA(shpnt)->debug & debug_eh) {
@ -1192,15 +1178,15 @@ static int aha152x_device_reset(Scsi_Cmnd * SCpnt)
SCpnt->request_buffer = NULL;
SCpnt->request_bufflen = 0;
init_timer(&timer);
timer.data = (unsigned long) SCpnt;
timer.expires = jiffies + 100*HZ; /* 10s */
timer.function = (void (*)(unsigned long)) timer_expired;
aha152x_internal_queue(SCpnt, &done, resetting, reset_done);
aha152x_internal_queue(SCpnt, &sem, resetting, reset_done);
add_timer(&timer);
down(&sem);
del_timer(&timer);
timeleft = wait_for_completion_timeout(&done, 100*HZ);
if (!timeleft) {
/* remove command from issue queue */
DO_LOCK(flags);
remove_SC(&ISSUE_SC, SCpnt);
DO_UNLOCK(flags);
}
SCpnt->cmd_len = old_cmd_len;
SCpnt->use_sg = old_use_sg;