-stable review patch. If anyone has any objections, please let us know.
------------------
From: James Bottomley <[email protected]>
The calculation of nr_pages in scsi_req_map_sg() doesn't account for
the fact that the first page could have an offset that pushes the end
of the buffer onto a new page.
Signed-off-by: Bryan Holty <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
Signed-off-by: Chris Wright <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/scsi/scsi_lib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.16.21.orig/drivers/scsi/scsi_lib.c
+++ linux-2.6.16.21/drivers/scsi/scsi_lib.c
@@ -368,7 +368,7 @@ static int scsi_req_map_sg(struct reques
int nsegs, unsigned bufflen, gfp_t gfp)
{
struct request_queue *q = rq->q;
- int nr_pages = (bufflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ int nr_pages = (bufflen + sgl[0].offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
unsigned int data_len = 0, len, bytes, off;
struct page *page;
struct bio *bio = NULL;
--
-
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