[SCSI] sg: remove while (1) non-loop
The while (1) construct isn't actually a loop at all. So let's not
pretent and obfuscate the code.
Signed-off-by: Joern Engel <joern@logfs.org>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 14de843..be812e0 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -398,19 +398,15 @@
retval = -EAGAIN;
goto free_old_hdr;
}
- while (1) {
- retval = 0; /* following macro beats race condition */
- __wait_event_interruptible(sfp->read_wait,
- (sdp->detached ||
- (srp = sg_get_rq_mark(sfp, req_pack_id))),
- retval);
- if (sdp->detached) {
- retval = -ENODEV;
- goto free_old_hdr;
- }
- if (0 == retval)
- break;
-
+ retval = 0; /* following macro beats race condition */
+ __wait_event_interruptible(sfp->read_wait,
+ (sdp->detached ||
+ (srp = sg_get_rq_mark(sfp, req_pack_id))), retval);
+ if (sdp->detached) {
+ retval = -ENODEV;
+ goto free_old_hdr;
+ }
+ if (retval) {
/* -ERESTARTSYS as signal hit process */
goto free_old_hdr;
}
@@ -801,25 +797,21 @@
1, read_only, 1, &srp);
if (result < 0)
return result;
- while (1) {
- result = 0; /* following macro to beat race condition */
- __wait_event_interruptible(sfp->read_wait,
- (srp->done || sdp->detached),
- result);
- if (sdp->detached)
- return -ENODEV;
- write_lock_irq(&sfp->rq_list_lock);
- if (srp->done) {
- srp->done = 2;
- write_unlock_irq(&sfp->rq_list_lock);
- break;
- }
- srp->orphan = 1;
+ result = 0; /* following macro to beat race condition */
+ __wait_event_interruptible(sfp->read_wait,
+ (srp->done || sdp->detached), result);
+ if (sdp->detached)
+ return -ENODEV;
+ write_lock_irq(&sfp->rq_list_lock);
+ if (srp->done) {
+ srp->done = 2;
write_unlock_irq(&sfp->rq_list_lock);
- return result; /* -ERESTARTSYS because signal hit process */
+ result = sg_new_read(sfp, p, SZ_SG_IO_HDR, srp);
+ return (result < 0) ? result : 0;
}
- result = sg_new_read(sfp, p, SZ_SG_IO_HDR, srp);
- return (result < 0) ? result : 0;
+ srp->orphan = 1;
+ write_unlock_irq(&sfp->rq_list_lock);
+ return result; /* -ERESTARTSYS because signal hit process */
case SG_SET_TIMEOUT:
result = get_user(val, ip);
if (result)
