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, 18 insertions, 23 deletions

diff --git a/drivers/block/xd.c b/drivers/block/xd.c
index 64b496fce98b..ce2429219925 100644
--- a/drivers/block/xd.c
+++ b/drivers/block/xd.c
@@ -305,30 +305,25 @@ static void do_xd_request (struct request_queue * q)
         if (xdc_busy)
                 return;
 
-        while ((req = elv_next_request(q)) != NULL) {
-                unsigned block = req->sector;
-                unsigned count = req->nr_sectors;
-                int rw = rq_data_dir(req);
+        req = blk_fetch_request(q);
+        while (req) {
+                unsigned block = blk_rq_pos(req);
+                unsigned count = blk_rq_cur_sectors(req);
                 XD_INFO *disk = req->rq_disk->private_data;
-                int res = 0;
+                int res = -EIO;
                 int retry;
 
-                if (!blk_fs_request(req)) {
-                        end_request(req, 0);
-                        continue;
-                }
-                if (block + count > get_capacity(req->rq_disk)) {
-                        end_request(req, 0);
-                        continue;
-                }
-                if (rw != READ && rw != WRITE) {
-                        printk("do_xd_request: unknown request\n");
-                        end_request(req, 0);
-                        continue;
-                }
+                if (!blk_fs_request(req))
+                        goto done;
+                if (block + count > get_capacity(req->rq_disk))
+                        goto done;
                 for (retry = 0; (retry < XD_RETRIES) && !res; retry++)
-                        res = xd_readwrite(rw, disk, req->buffer, block, count);
-                end_request(req, res);  /* wrap up, 0 = fail, 1 = success */
+                        res = xd_readwrite(rq_data_dir(req), disk, req->buffer,
+                                           block, count);
+        done:
+                /* wrap up, 0 = success, -errno = fail */
+                if (!__blk_end_request_cur(req, res))
+                        req = blk_fetch_request(q);
         }
 }
 
@@ -418,7 +413,7 @@ static int xd_readwrite (u_char operation,XD_INFO *p,char *buffer,u_int block,u_
                                 printk("xd%c: %s timeout, recalibrating drive\n",'a'+drive,(operation == READ ? "read" : "write"));
                                 xd_recalibrate(drive);
                                 spin_lock_irq(&xd_lock);
-                                return (0);
+                                return -EIO;
                         case 2:
                                 if (sense[0] & 0x30) {
                                         printk("xd%c: %s - ",'a'+drive,(operation == READ ? "reading" : "writing"));
@@ -439,7 +434,7 @@ static int xd_readwrite (u_char operation,XD_INFO *p,char *buffer,u_int block,u_
                                 else
                                         printk(" - no valid disk address\n");
                                 spin_lock_irq(&xd_lock);
-                                return (0);
+                                return -EIO;
                 }
                 if (xd_dma_buffer)
                         for (i=0; i < (temp * 0x200); i++)
@@ -448,7 +443,7 @@ static int xd_readwrite (u_char operation,XD_INFO *p,char *buffer,u_int block,u_
                 count -= temp, buffer += temp * 0x200, block += temp;
         }
         spin_lock_irq(&xd_lock);
-        return (1);
+        return 0;
 }
 
 /* xd_recalibrate: recalibrate a given drive and reset controller if necessary */