diff options
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 61 |
1 files changed, 39 insertions, 22 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 8c73bb4e0a2f..911514c1fea7 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -91,26 +91,19 @@ static void scsi_unprep_request(struct request *req) scsi_put_command(cmd); } -/* - * Function: scsi_queue_insert() - * - * Purpose: Insert a command in the midlevel queue. - * - * Arguments: cmd - command that we are adding to queue. - * reason - why we are inserting command to queue. - * - * Lock status: Assumed that lock is not held upon entry. - * - * Returns: Nothing. - * - * Notes: We do this for one of two cases. Either the host is busy - * and it cannot accept any more commands for the time being, - * or the device returned QUEUE_FULL and can accept no more - * commands. - * Notes: This could be called either from an interrupt context or a - * normal process context. +/** + * __scsi_queue_insert - private queue insertion + * @cmd: The SCSI command being requeued + * @reason: The reason for the requeue + * @unbusy: Whether the queue should be unbusied + * + * This is a private queue insertion. The public interface + * scsi_queue_insert() always assumes the queue should be unbusied + * because it's always called before the completion. This function is + * for a requeue after completion, which should only occur in this + * file. */ -int scsi_queue_insert(struct scsi_cmnd *cmd, int reason) +static int __scsi_queue_insert(struct scsi_cmnd *cmd, int reason, int unbusy) { struct Scsi_Host *host = cmd->device->host; struct scsi_device *device = cmd->device; @@ -150,7 +143,8 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason) * Decrement the counters, since these commands are no longer * active on the host/device. */ - scsi_device_unbusy(device); + if (unbusy) + scsi_device_unbusy(device); /* * Requeue this command. It will go before all other commands @@ -172,6 +166,29 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason) return 0; } +/* + * Function: scsi_queue_insert() + * + * Purpose: Insert a command in the midlevel queue. + * + * Arguments: cmd - command that we are adding to queue. + * reason - why we are inserting command to queue. + * + * Lock status: Assumed that lock is not held upon entry. + * + * Returns: Nothing. + * + * Notes: We do this for one of two cases. Either the host is busy + * and it cannot accept any more commands for the time being, + * or the device returned QUEUE_FULL and can accept no more + * commands. + * Notes: This could be called either from an interrupt context or a + * normal process context. + */ +int scsi_queue_insert(struct scsi_cmnd *cmd, int reason) +{ + return __scsi_queue_insert(cmd, reason, 1); +} /** * scsi_execute - insert request and wait for the result * @sdev: scsi device @@ -1075,11 +1092,11 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) break; case ACTION_RETRY: /* Retry the same command immediately */ - scsi_queue_insert(cmd, SCSI_MLQUEUE_EH_RETRY); + __scsi_queue_insert(cmd, SCSI_MLQUEUE_EH_RETRY, 0); break; case ACTION_DELAYED_RETRY: /* Retry the same command after a delay */ - scsi_queue_insert(cmd, SCSI_MLQUEUE_DEVICE_BUSY); + __scsi_queue_insert(cmd, SCSI_MLQUEUE_DEVICE_BUSY, 0); break; } } |
