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authorJames Bottomley <James.Bottomley@steeleye.com>2005-09-14 12:57:42 -0400
committerJames Bottomley <jejb@mulgrave.(none)>2005-09-14 16:59:03 -0400
commit59897dad98d63ac15e1e36fcc3a107c892b1826c (patch)
tree42e65c1e3e99ab12ab484b0311c4487ae7a76148 /drivers/scsi
parentd39a942c3f4061d2218dcadf79ce10010dbcdb3c (diff)
[SCSI] fix sym scsi boot hang
On Wed, 2005-09-14 at 18:06 +1000, Anton Blanchard wrote: > And in particular it looks like the scsi_unprep_request in > scsi_queue_insert is causing it. The following patch fixes the boot > problems on the vscsi machine: OK, my fault. Your fix is almost correct .. I was going to do this eventually, honest, because there's no need to unprep and reprep a command that comes in through scsi_queue_insert(). However, I decided to leave it in to exercise the scsi_unprep_request() path just to make sure it was working. What's happening, I think, is that we also use this path for retries. Since we kill and reget the command each time, the retries decrement is never seen, so we're retrying forever. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/scsi_lib.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index f9026d08532a..0c6924eecf59 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -140,14 +140,12 @@ static void scsi_unprep_request(struct request *req)
* commands.
* Notes: This could be called either from an interrupt context or a
* normal process context.
- * Notes: Upon return, cmd is a stale pointer.
*/
int scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
{
struct Scsi_Host *host = cmd->device->host;
struct scsi_device *device = cmd->device;
struct request_queue *q = device->request_queue;
- struct request *req = cmd->request;
unsigned long flags;
SCSI_LOG_MLQUEUE(1,
@@ -188,9 +186,8 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
* function. The SCSI request function detects the blocked condition
* and plugs the queue appropriately.
*/
- scsi_unprep_request(req);
spin_lock_irqsave(q->queue_lock, flags);
- blk_requeue_request(q, req);
+ blk_requeue_request(q, cmd->request);
spin_unlock_irqrestore(q->queue_lock, flags);
scsi_run_queue(q);