Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block: (153 commits)
  block: add request clone interface (v2)
  floppy: fix hibernation
  ramdisk: remove long-deprecated "ramdisk=" boot-time parameter
  fs/bio.c: add missing __user annotation
  block: prevent possible io_context->refcount overflow
  Add serial number support for virtio_blk, V4a
  block: Add missing bounce_pfn stacking and fix comments
  Revert "block: Fix bounce limit setting in DM"
  cciss: decode unit attention in SCSI error handling code
  cciss: Remove no longer needed sendcmd reject processing code
  cciss: change SCSI error handling routines to work with interrupts enabled.
  cciss: separate error processing and command retrying code in sendcmd_withirq_core()
  cciss: factor out fix target status processing code from sendcmd functions
  cciss: simplify interface of sendcmd() and sendcmd_withirq()
  cciss: factor out core of sendcmd_withirq() for use by SCSI error handling code
  cciss: Use schedule_timeout_uninterruptible in SCSI error handling code
  block: needs to set the residual length of a bidi request
  Revert "block: implement blkdev_readpages"
  block: Fix bounce limit setting in DM
  Removed reference to non-existing file Documentation/PCI/PCI-DMA-mapping.txt
  ...

Manually fix conflicts with tracing updates in:
	block/blk-sysfs.c
	drivers/ide/ide-atapi.c
	drivers/ide/ide-cd.c
	drivers/ide/ide-floppy.c
	drivers/ide/ide-tape.c
	include/trace/events/block.h
	kernel/trace/blktrace.c

1 files changed, 15 insertions, 6 deletions

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index afe5a4323879..757e5956b132 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -246,6 +246,7 @@ EXPORT_SYMBOL_GPL(ide_queue_sense_rq);
  */
 void ide_retry_pc(ide_drive_t *drive)
 {
+        struct request *failed_rq = drive->hwif->rq;
         struct request *sense_rq = &drive->sense_rq;
         struct ide_atapi_pc *pc = &drive->request_sense_pc;
 
@@ -255,13 +256,22 @@ void ide_retry_pc(ide_drive_t *drive)
         ide_init_pc(pc);
         memcpy(pc->c, sense_rq->cmd, 12);
         pc->buf = bio_data(sense_rq->bio);      /* pointer to mapped address */
-        pc->req_xfer = sense_rq->data_len;
+        pc->req_xfer = blk_rq_bytes(sense_rq);
 
         if (drive->media == ide_tape)
                 set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
 
-        if (ide_queue_sense_rq(drive, pc))
-                ide_complete_rq(drive, -EIO, blk_rq_bytes(drive->hwif->rq));
+        /*
+         * Push back the failed request and put request sense on top
+         * of it.  The failed command will be retried after sense data
+         * is acquired.
+         */
+        blk_requeue_request(failed_rq->q, failed_rq);
+        drive->hwif->rq = NULL;
+        if (ide_queue_sense_rq(drive, pc)) {
+                blk_start_request(failed_rq);
+                ide_complete_rq(drive, -EIO, blk_rq_bytes(failed_rq));
+        }
 }
 EXPORT_SYMBOL_GPL(ide_retry_pc);
 
@@ -303,7 +313,7 @@ int ide_cd_get_xferlen(struct request *rq)
                 return 32768;
         else if (blk_sense_request(rq) || blk_pc_request(rq) ||
                          rq->cmd_type == REQ_TYPE_ATA_PC)
-                return rq->data_len;
+                return blk_rq_bytes(rq);
         else
                 return 0;
 }
@@ -367,7 +377,6 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
         /* No more interrupts */
         if ((stat & ATA_DRQ) == 0) {
                 int uptodate, error;
-                unsigned int done;
 
                 debug_log("Packet command completed, %d bytes transferred\n",
                           pc->xferred);
@@ -431,7 +440,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
                         error = uptodate ? 0 : -EIO;
                 }
 
-                ide_complete_rq(drive, error, done);
+                ide_complete_rq(drive, error, blk_rq_bytes(rq));
                 return ide_stopped;
         }