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ide: save the returned value of dma_map_sg

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dma_map_sg could return a value different to 'nents' argument of
dma_map_sg so the ide stack needs to save it for the later usage
(e.g. for_each_sg).

The ide stack also needs to save the original sg_nents value for
pci_unmap_sg.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
[bart: backport to Linus' tree]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
FUJITA Tomonori 2009-03-13 21:16:13 +01:00 • committed by Bartlomiej Zolnierkiewicz
parent 3eb76c1ccd
commit 5d82720a7f
2 changed files with 10 additions and 3 deletions
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1
include/linux/ide.h
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@ -797,6 +797,7 @@ typedef struct hwif_s {
struct scatterlist *sg_table;
int sg_max_nents; /* Maximum number of entries in it */
int sg_nents; /* Current number of entries in it */
int orig_sg_nents;
int sg_dma_direction; /* dma transfer direction */
/* data phase of the active command (currently only valid for PIO/DMA) */