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Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6

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* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6:
  ide: save the returned value of dma_map_sg
  ide-floppy: do not map dataless cmds to an sg
This commit is contained in:
Linus Torvalds 2009-03-14 11:58:10 -07:00
commit 6d71135d63
4 changed files with 26 additions and 5 deletions
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12
drivers/ide/ide-atapi.c
View File

@ -140,6 +140,12 @@ static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
rq->cmd_flags |= REQ_PREEMPT;
rq->buffer = (char *)pc;
rq->rq_disk = disk;
if (pc->req_xfer) {
rq->data = pc->buf;
rq->data_len = pc->req_xfer;
}
memcpy(rq->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;
@ -159,6 +165,12 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->buffer = (char *)pc;
if (pc->req_xfer) {
rq->data = pc->buf;
rq->data_len = pc->req_xfer;
}
memcpy(rq->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;

12
drivers/ide/ide-dma.c
View File

@ -128,6 +128,7 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
int i;
ide_map_sg(drive, rq);
@ -136,8 +137,13 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
else
hwif->sg_dma_direction = DMA_TO_DEVICE;
return dma_map_sg(hwif->dev, sg, hwif->sg_nents,
hwif->sg_dma_direction);
i = dma_map_sg(hwif->dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
if (i) {
hwif->orig_sg_nents = hwif->sg_nents;
hwif->sg_nents = i;
}
return i;
}
EXPORT_SYMBOL_GPL(ide_build_sglist);
@ -156,7 +162,7 @@ void ide_destroy_dmatable(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->orig_sg_nents,
hwif->sg_dma_direction);
}
EXPORT_SYMBOL_GPL(ide_destroy_dmatable);

6
drivers/ide/ide-floppy.c
View File

@ -327,8 +327,10 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
return ide_stopped;
}
ide_init_sg_cmd(drive, rq);
ide_map_sg(drive, rq);
if (blk_fs_request(rq) || pc->req_xfer) {
ide_init_sg_cmd(drive, rq);
ide_map_sg(drive, rq);
}
pc->sg = hwif->sg_table;
pc->sg_cnt = hwif->sg_nents;

1
include/linux/ide.h
View File

@ -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) */