From: Adrian Hunter <adrian.hunter@nokia.com>
Date: Wed, 4 Mar 2009 07:53:40 +0000 (+0200)
Subject: [MTD] mtdoops: fix a bit of spin lock usage
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=48ec00ac895074f8a47bda8f3925ccaa46abb7a8;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

[MTD] mtdoops: fix a bit of spin lock usage

- do not leave spin lock locked
- initialise spin lock

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

diff --git a/drivers/mtd/mtdoops.c b/drivers/mtd/mtdoops.c
index fdf504fb319a..1060337c06df 100644
--- a/drivers/mtd/mtdoops.c
+++ b/drivers/mtd/mtdoops.c
@@ -361,8 +361,10 @@ mtdoops_console_write(struct console *co, const char *s, unsigned int count)
 	spin_lock_irqsave(&cxt->writecount_lock, flags);
 
 	/* Check ready status didn't change whilst waiting for the lock */
-	if (!cxt->ready)
+	if (!cxt->ready) {
+		spin_unlock_irqrestore(&cxt->writecount_lock, flags);
 		return;
+	}
 
 	if (cxt->writecount == 0) {
 		u32 *stamp = cxt->oops_buf;
@@ -420,6 +422,7 @@ static int __init mtdoops_console_init(void)
 
 	cxt->mtd_index = -1;
 	cxt->oops_buf = vmalloc(OOPS_PAGE_SIZE);
+	spin_lock_init(&cxt->writecount_lock);
 
 	if (!cxt->oops_buf) {
 		printk(KERN_ERR "Failed to allocate mtdoops buffer workspace\n");