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authorBrian King <brking@us.ibm.com>2006-02-24 17:10:04 -0600
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-02-27 21:38:39 -0600
commit8884efab1516613215816d48132dd724508970bf (patch)
tree613b80a6adea59defeed3a1fa9fdc6dde7313a28
parent147aab6aa22ce7775be944f8fb9932aa000dda61 (diff)
[SCSI] scsi: scsi command retries off by one fix
Fix up an off by one error in calculating retries for scsi commands. This bug was discovered when an SG_IO request was sent to scsi core with retries = 0, causing the overall timeout check to go off in scsi_softirq_done. Signed-off-by: Brian King <brking@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
-rw-r--r--drivers/scsi/scsi_error.c4
-rw-r--r--drivers/scsi/scsi_lib.c2
2 files changed, 3 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 5cc97b721661..ff82ccfbb106 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1308,7 +1308,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd)
* the request was not marked fast fail. Note that above,
* even if the request is marked fast fail, we still requeue
* for queue congestion conditions (QUEUE_FULL or BUSY) */
- if ((++scmd->retries) < scmd->allowed
+ if ((++scmd->retries) <= scmd->allowed
&& !blk_noretry_request(scmd->request)) {
return NEEDS_RETRY;
} else {
@@ -1433,7 +1433,7 @@ static void scsi_eh_flush_done_q(struct list_head *done_q)
list_del_init(&scmd->eh_entry);
if (scsi_device_online(scmd->device) &&
!blk_noretry_request(scmd->request) &&
- (++scmd->retries < scmd->allowed)) {
+ (++scmd->retries <= scmd->allowed)) {
SCSI_LOG_ERROR_RECOVERY(3, printk("%s: flush"
" retry cmd: %p\n",
current->comm,
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 4362dcde74af..701a328f7beb 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1498,7 +1498,7 @@ static void scsi_kill_request(struct request *req, request_queue_t *q)
static void scsi_softirq_done(struct request *rq)
{
struct scsi_cmnd *cmd = rq->completion_data;
- unsigned long wait_for = cmd->allowed * cmd->timeout_per_command;
+ unsigned long wait_for = (cmd->allowed + 1) * cmd->timeout_per_command;
int disposition;
INIT_LIST_HEAD(&cmd->eh_entry);