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aoe: convert emsgs_sema into a completion 

ATA over Ethernet: The semaphore emsgs_sema is used for signalling an
event, convert it in a completion.

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Cc: "Ed L. Cashin" <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthias Kaehlcke 2008-07-25 01:48:38 -07:00 committed by Linus Torvalds
parent dbda0de526
commit 24879a8e3e
1 changed files with 5 additions and 4 deletions
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9
drivers/block/aoe/aoechr.c
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@ -6,6 +6,7 @@
#include <linux/hdreg.h>
#include <linux/blkdev.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/smp_lock.h>
#include "aoe.h"
@ -36,7 +37,7 @@ struct ErrMsg {
static struct ErrMsg emsgs[NMSG];
static int emsgs_head_idx, emsgs_tail_idx;
static struct semaphore emsgs_sema;
static struct completion emsgs_comp;
static spinlock_t emsgs_lock;
static int nblocked_emsgs_readers;
static struct class *aoe_class;
@ -141,7 +142,7 @@ bail: spin_unlock_irqrestore(&emsgs_lock, flags);
spin_unlock_irqrestore(&emsgs_lock, flags);
if (nblocked_emsgs_readers)
up(&emsgs_sema);
complete(&emsgs_comp);
}
static ssize_t
@ -221,7 +222,7 @@ aoechr_read(struct file *filp, char __user *buf, size_t cnt, loff_t *off)
spin_unlock_irqrestore(&emsgs_lock, flags);
n = down_interruptible(&emsgs_sema);
n = wait_for_completion_interruptible(&emsgs_comp);
spin_lock_irqsave(&emsgs_lock, flags);
@ -269,7 +270,7 @@ aoechr_init(void)
printk(KERN_ERR "aoe: can't register char device\n");
return n;
}
sema_init(&emsgs_sema, 0);
init_completion(&emsgs_comp);
spin_lock_init(&emsgs_lock);
aoe_class = class_create(THIS_MODULE, "aoe");
if (IS_ERR(aoe_class)) {