[SCSI] fix up request buffer reference in various scsi drivers
Various scsi drivers use scsi_cmnd.buffer and scsi_cmnd.bufflen in their
queuecommand functions. Those fields are internal storage for the
midlayer only and are used to restore the original payload after
request_buffer and request_bufflen have been overwritten for EH. Using
the buffer and bufflen fields means they do very broken things in error
handling.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index c647d85..a112e49 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -891,7 +891,7 @@
static void sd_rw_intr(struct scsi_cmnd * SCpnt)
{
int result = SCpnt->result;
- int this_count = SCpnt->bufflen;
+ int this_count = SCpnt->request_bufflen;
int good_bytes = (result == 0 ? this_count : 0);
sector_t block_sectors = 1;
u64 first_err_block;