diff options
| author | Jörn Engel <joern@logfs.org> | 2012-04-13 01:33:25 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-05-17 13:08:53 +0400 |
| commit | 3f0c6aba0b65a68013c1e0db1b015f02e6ec24be (patch) | |
| tree | 9af2cdcfa608b794d783674f1e68129cf6d2d31d | |
| parent | 794c10fa0fa4d1781c5651c31e3d4d0b71629128 (diff) | |
| download | linux-3f0c6aba0b65a68013c1e0db1b015f02e6ec24be.tar.xz | |
[SCSI] sg: use wait_event_interruptible()
Afaics the use of __wait_event_interruptible() as opposed to
wait_event_interruptible() is purely historic. So let's follow the rest
of the kernel and check the condition before prepare_to_wait() - and
also make the code a bit nicer.
Signed-off-by: Joern Engel <joern@logfs.org>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
| -rw-r--r-- | drivers/scsi/sg.c | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index be812e09058d..1a0be4f1d1fa 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -268,9 +268,8 @@ sg_open(struct inode *inode, struct file *filp) retval = -EBUSY; goto error_out; } - res = 0; - __wait_event_interruptible(sdp->o_excl_wait, - ((!list_empty(&sdp->sfds) || sdp->exclude) ? 0 : (sdp->exclude = 1)), res); + res = wait_event_interruptible(sdp->o_excl_wait, + ((!list_empty(&sdp->sfds) || sdp->exclude) ? 0 : (sdp->exclude = 1))); if (res) { retval = res; /* -ERESTARTSYS because signal hit process */ goto error_out; @@ -280,9 +279,7 @@ sg_open(struct inode *inode, struct file *filp) retval = -EBUSY; goto error_out; } - res = 0; - __wait_event_interruptible(sdp->o_excl_wait, (!sdp->exclude), - res); + res = wait_event_interruptible(sdp->o_excl_wait, !sdp->exclude); if (res) { retval = res; /* -ERESTARTSYS because signal hit process */ goto error_out; @@ -398,10 +395,9 @@ sg_read(struct file *filp, char __user *buf, size_t count, loff_t * ppos) retval = -EAGAIN; goto free_old_hdr; } - retval = 0; /* following macro beats race condition */ - __wait_event_interruptible(sfp->read_wait, + retval = wait_event_interruptible(sfp->read_wait, (sdp->detached || - (srp = sg_get_rq_mark(sfp, req_pack_id))), retval); + (srp = sg_get_rq_mark(sfp, req_pack_id)))); if (sdp->detached) { retval = -ENODEV; goto free_old_hdr; @@ -797,9 +793,8 @@ sg_ioctl(struct file *filp, unsigned int cmd_in, unsigned long arg) 1, read_only, 1, &srp); if (result < 0) return result; - result = 0; /* following macro to beat race condition */ - __wait_event_interruptible(sfp->read_wait, - (srp->done || sdp->detached), result); + result = wait_event_interruptible(sfp->read_wait, + (srp->done || sdp->detached)); if (sdp->detached) return -ENODEV; write_lock_irq(&sfp->rq_list_lock); |