[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/ncr53c8xx.c b/drivers/scsi/ncr53c8xx.c
index 22f9131..6ab0355 100644
--- a/drivers/scsi/ncr53c8xx.c
+++ b/drivers/scsi/ncr53c8xx.c
@@ -529,7 +529,7 @@
{
switch(cmd->__data_mapped) {
case 2:
- dma_unmap_sg(dev, cmd->buffer, cmd->use_sg,
+ dma_unmap_sg(dev, cmd->request_buffer, cmd->use_sg,
cmd->sc_data_direction);
break;
case 1:
@@ -564,7 +564,7 @@
if (cmd->use_sg == 0)
return 0;
- use_sg = dma_map_sg(dev, cmd->buffer, cmd->use_sg,
+ use_sg = dma_map_sg(dev, cmd->request_buffer, cmd->use_sg,
cmd->sc_data_direction);
cmd->__data_mapped = 2;
cmd->__data_mapping = use_sg;
@@ -7697,7 +7697,7 @@
if (!use_sg)
segment = ncr_scatter_no_sglist(np, cp, cmd);
else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
- struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
+ struct scatterlist *scatter = (struct scatterlist *)cmd->request_buffer;
struct scr_tblmove *data;
if (use_sg > MAX_SCATTER) {