sg_dma_len(sg) is invalid before the s/g list is DMA-mapped.
This fixes a post 2.6.24 regression which prevents access to SBP-2
devices on several architectures, introduced by "ieee1394: sbp2: s/g
list access cosmetics", commit 825f1df545ab0289185373b0eaf06fb0b3487422.
Signed-off-by: Stefan Richter <[EMAIL PROTECTED]>
---
drivers/ieee1394/sbp2.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
Index: linux-2.6.24/drivers/ieee1394/sbp2.c
===================================================================
--- linux-2.6.24.orig/drivers/ieee1394/sbp2.c
+++ linux-2.6.24/drivers/ieee1394/sbp2.c
@@ -1465,10 +1465,9 @@ static void sbp2_prep_command_orb_sg(str
orb->misc |= ORB_SET_DIRECTION(orb_direction);
/* special case if only one element (and less than 64KB in size) */
- if ((scsi_use_sg == 1) &&
- (sg_dma_len(sg) <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
+ if (scsi_use_sg == 1 && sg->length <= SBP2_MAX_SG_ELEMENT_LENGTH) {
- cmd->dma_size = sg_dma_len(sg);
+ cmd->dma_size = sg->length;
cmd->dma_type = CMD_DMA_PAGE;
cmd->cmd_dma = dma_map_page(hi->host->device.parent,
sg_page(sg), sg->offset,
--
Stefan Richter
-=====-==--- --=- ----=
http://arcgraph.de/sr/
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