}
static void scsi_run_queue(struct request_queue *q);
-static void scsi_release_buffers(struct scsi_cmnd *cmd);
/*
* Function: scsi_unprep_request()
}
EXPORT_SYMBOL(scsi_do_req);
-/* This is the end routine we get to if a command was never attached
- * to the request. Simply complete the request without changing
- * rq_status; this will cause a DRIVER_ERROR. */
-static void scsi_wait_req_end_io(struct request *req)
-{
- BUG_ON(!req->waiting);
-
- complete(req->waiting);
-}
-
-void scsi_wait_req(struct scsi_request *sreq, const void *cmnd, void *buffer,
- unsigned bufflen, int timeout, int retries)
-{
- DECLARE_COMPLETION(wait);
- int write = (sreq->sr_data_direction == DMA_TO_DEVICE);
- struct request *req;
-
- req = blk_get_request(sreq->sr_device->request_queue, write,
- __GFP_WAIT);
- if (bufflen && blk_rq_map_kern(sreq->sr_device->request_queue, req,
- buffer, bufflen, __GFP_WAIT)) {
- sreq->sr_result = DRIVER_ERROR << 24;
- blk_put_request(req);
- return;
- }
-
- req->flags |= REQ_NOMERGE;
- req->waiting = &wait;
- req->end_io = scsi_wait_req_end_io;
- req->cmd_len = COMMAND_SIZE(((u8 *)cmnd)[0]);
- req->sense = sreq->sr_sense_buffer;
- req->sense_len = 0;
- memcpy(req->cmd, cmnd, req->cmd_len);
- req->timeout = timeout;
- req->flags |= REQ_BLOCK_PC;
- req->rq_disk = NULL;
- blk_insert_request(sreq->sr_device->request_queue, req,
- sreq->sr_data_direction == DMA_TO_DEVICE, NULL);
- wait_for_completion(&wait);
- sreq->sr_request->waiting = NULL;
- sreq->sr_result = req->errors;
- if (req->errors)
- sreq->sr_result |= (DRIVER_ERROR << 24);
-
- blk_put_request(req);
-}
-
-EXPORT_SYMBOL(scsi_wait_req);
-
/**
* scsi_execute - insert request and wait for the result
* @sdev: scsi device
void scsi_next_command(struct scsi_cmnd *cmd)
{
- struct request_queue *q = cmd->device->request_queue;
+ struct scsi_device *sdev = cmd->device;
+ struct request_queue *q = sdev->request_queue;
+
+ /* need to hold a reference on the device before we let go of the cmd */
+ get_device(&sdev->sdev_gendev);
scsi_put_command(cmd);
scsi_run_queue(q);
+
+ /* ok to remove device now */
+ put_device(&sdev->sdev_gendev);
}
void scsi_run_host_queues(struct Scsi_Host *shost)
return NULL;
}
-static struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, int gfp_mask)
+static struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask)
{
struct scsi_host_sg_pool *sgp;
struct scatterlist *sgl;
return;
}
if (!(req->flags & REQ_QUIET))
- dev_printk(KERN_INFO,
- &cmd->device->sdev_gendev,
+ scmd_printk(KERN_INFO, cmd,
"Device not ready.\n");
scsi_end_request(cmd, 0, this_count, 1);
return;
case VOLUME_OVERFLOW:
if (!(req->flags & REQ_QUIET)) {
- dev_printk(KERN_INFO,
- &cmd->device->sdev_gendev,
+ scmd_printk(KERN_INFO, cmd,
"Volume overflow, CDB: ");
__scsi_print_command(cmd->data_cmnd);
scsi_print_sense("", cmd);
}
if (result) {
if (!(req->flags & REQ_QUIET)) {
- dev_printk(KERN_INFO, &cmd->device->sdev_gendev,
+ scmd_printk(KERN_INFO, cmd,
"SCSI error: return code = 0x%x\n", result);
if (driver_byte(result) & DRIVER_SENSE)
* if sg table allocation fails, requeue request later.
*/
sgpnt = scsi_alloc_sgtable(cmd, GFP_ATOMIC);
- if (unlikely(!sgpnt))
+ if (unlikely(!sgpnt)) {
+ scsi_unprep_request(req);
return BLKPREP_DEFER;
+ }
cmd->request_buffer = (char *) sgpnt;
cmd->request_bufflen = req->nr_sectors << 9;
* online before trying any recovery commands
*/
if (unlikely(!scsi_device_online(sdev))) {
- printk(KERN_ERR "scsi%d (%d:%d): rejecting I/O to offline device\n",
- sdev->host->host_no, sdev->id, sdev->lun);
+ sdev_printk(KERN_ERR, sdev,
+ "rejecting I/O to offline device\n");
goto kill;
}
if (unlikely(sdev->sdev_state != SDEV_RUNNING)) {
if (sdev->sdev_state == SDEV_DEL) {
/* Device is fully deleted, no commands
* at all allowed down */
- printk(KERN_ERR "scsi%d (%d:%d): rejecting I/O to dead device\n",
- sdev->host->host_no, sdev->id, sdev->lun);
+ sdev_printk(KERN_ERR, sdev,
+ "rejecting I/O to dead device\n");
goto kill;
}
/* OK, we only allow special commands (i.e. not
specials_only == SDEV_BLOCK)
goto defer;
- printk(KERN_ERR "scsi%d (%d:%d): rejecting I/O to device being removed\n",
- sdev->host->host_no, sdev->id, sdev->lun);
+ sdev_printk(KERN_ERR, sdev,
+ "rejecting I/O to device being removed\n");
goto kill;
}
*/
ret = scsi_init_io(cmd);
switch(ret) {
+ /* For BLKPREP_KILL/DEFER the cmd was released */
case BLKPREP_KILL:
- /* BLKPREP_KILL return also releases the command */
goto kill;
case BLKPREP_DEFER:
goto defer;
*/
if (--sdev->device_blocked == 0) {
SCSI_LOG_MLQUEUE(3,
- printk("scsi%d (%d:%d) unblocking device at"
- " zero depth\n", sdev->host->host_no,
- sdev->id, sdev->lun));
+ sdev_printk(KERN_INFO, sdev,
+ "unblocking device at zero depth\n"));
} else {
blk_plug_device(q);
return 0;
break;
if (unlikely(!scsi_device_online(sdev))) {
- printk(KERN_ERR "scsi%d (%d:%d): rejecting I/O to offline device\n",
- sdev->host->host_no, sdev->id, sdev->lun);
+ sdev_printk(KERN_ERR, sdev,
+ "rejecting I/O to offline device\n");
scsi_kill_request(req, q);
continue;
}
illegal:
SCSI_LOG_ERROR_RECOVERY(1,
- dev_printk(KERN_ERR, &sdev->sdev_gendev,
- "Illegal state transition %s->%s\n",
- scsi_device_state_name(oldstate),
- scsi_device_state_name(state))
+ sdev_printk(KERN_ERR, sdev,
+ "Illegal state transition %s->%s\n",
+ scsi_device_state_name(oldstate),
+ scsi_device_state_name(state))
);
return -EINVAL;
}
projects / mirror_ubuntu-zesty-kernel.git / blobdiff