[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>

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);