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block: fix oops in blk_queue_io_stat()

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Some initial probe requests don't have disk->queue mapped yet, so we
can't rely on a non-NULL queue in blk_queue_io_stat(). Wrap it in
blk_do_io_stat().

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2009-02-02 08:42:32 +01:00
parent 45c82b5a77
commit fb8ec18c31
2 changed files with 11 additions and 3 deletions
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6
block/blk-core.c
View File

@ -69,7 +69,7 @@ static void drive_stat_acct(struct request *rq, int new_io)
int rw = rq_data_dir(rq);
int cpu;
if (!blk_fs_request(rq) || !disk || !blk_queue_io_stat(disk->queue))
if (!blk_fs_request(rq) || !disk || !blk_do_io_stat(disk->queue))
return;
cpu = part_stat_lock();
@ -1667,7 +1667,7 @@ static void blk_account_io_completion(struct request *req, unsigned int bytes)
{
struct gendisk *disk = req->rq_disk;
if (!disk || !blk_queue_io_stat(disk->queue))
if (!disk || !blk_do_io_stat(disk->queue))
return;
if (blk_fs_request(req)) {
@ -1686,7 +1686,7 @@ static void blk_account_io_done(struct request *req)
{
struct gendisk *disk = req->rq_disk;
if (!disk || !blk_queue_io_stat(disk->queue))
if (!disk || !blk_do_io_stat(disk->queue))
return;
/*

8
block/blk.h
View File

@ -108,4 +108,12 @@ static inline int blk_cpu_to_group(int cpu)
#endif
}
static inline int blk_do_io_stat(struct request_queue *q)
{
if (q)
return blk_queue_io_stat(q);
return 0;
}
#endif