[tip:tracing/blktrace-v2] blktrace: small cleanup in blk_msg_write()

[Li Zefan]

Commit-ID:  7635b03adf3d7b84da7649b81efa91e6ebf11b85
Gitweb:     http://git.kernel.org/tip/7635b03adf3d7b84da7649b81efa91e6ebf11b85
Author:     Li Zefan <lizf@xxxxxxxxxxxxxx>
AuthorDate: Fri, 3 Apr 2009 15:31:34 +0800
Committer:  Ingo Molnar <mingo@xxxxxxx>
CommitDate: Fri, 3 Apr 2009 14:48:11 +0200

blktrace: small cleanup in blk_msg_write()

Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: "Alan D. Brunelle" <alan.brunelle@xxxxxx>
Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
LKML-Reference: <49D5BB56.7000807@xxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>


---
 kernel/trace/blktrace.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index a400b86..73d7860 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -327,7 +327,7 @@ static ssize_t blk_msg_write(struct file *filp, const char __user *buffer,
 	char *msg;
 	struct blk_trace *bt;
 
-	if (count > BLK_TN_MAX_MSG - 1)
+	if (count >= BLK_TN_MAX_MSG)
 		return -EINVAL;
 
 	msg = kmalloc(count + 1, GFP_KERNEL);
--
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