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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-31 20:15:20 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-31 20:15:20 +0200
commit5ae5412d9a23b05ab08461b202bad21ad8f6b66d (patch)
tree25d86e7cf0b57e15efa74e5150c2a654fc9339c9
parent4453011f959a5f5c6c7a33aea54fe17f5e43a867 (diff)
ide: add ide_dma_prepare() helper
* Add ide_dma_prepare() helper. * Convert ide_issue_pc() and do_rw_taskfile() to use it. * Make ide_build_sglist() static. There should be no functional changes caused by this patch. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
-rw-r--r--drivers/ide/ide-atapi.c18
-rw-r--r--drivers/ide/ide-dma.c11
-rw-r--r--drivers/ide/ide-taskfile.c4
-rw-r--r--include/linux/ide.h7
4 files changed, 19 insertions, 21 deletions
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 1481f71f817..89d2339bdef 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -638,7 +638,6 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
{
struct ide_atapi_pc *pc;
ide_hwif_t *hwif = drive->hwif;
- const struct ide_dma_ops *dma_ops = hwif->dma_ops;
ide_expiry_t *expiry = NULL;
struct request *rq = hwif->rq;
unsigned int timeout;
@@ -652,12 +651,8 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
expiry = ide_cd_expiry;
timeout = ATAPI_WAIT_PC;
- if (drive->dma) {
- if (ide_build_sglist(drive, cmd))
- drive->dma = !dma_ops->dma_setup(drive, cmd);
- else
- drive->dma = 0;
- }
+ if (drive->dma)
+ drive->dma = !ide_dma_prepare(drive, cmd);
} else {
pc = drive->pc;
@@ -675,13 +670,8 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
ide_dma_off(drive);
}
- if ((pc->flags & PC_FLAG_DMA_OK) &&
- (drive->dev_flags & IDE_DFLAG_USING_DMA)) {
- if (ide_build_sglist(drive, cmd))
- drive->dma = !dma_ops->dma_setup(drive, cmd);
- else
- drive->dma = 0;
- }
+ if (pc->flags & PC_FLAG_DMA_OK)
+ drive->dma = !ide_dma_prepare(drive, cmd);
if (!drive->dma)
pc->flags &= ~PC_FLAG_DMA_OK;
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index b430898bbcd..cf5897f5533 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -128,7 +128,7 @@ int ide_dma_good_drive(ide_drive_t *drive)
* operate in a portable fashion.
*/
-int ide_build_sglist(ide_drive_t *drive, struct ide_cmd *cmd)
+static int ide_build_sglist(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
@@ -563,3 +563,12 @@ int ide_allocate_dma_engine(ide_hwif_t *hwif)
return 0;
}
EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
+
+int ide_dma_prepare(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
+ ide_build_sglist(drive, cmd) == 0 ||
+ drive->hwif->dma_ops->dma_setup(drive, cmd))
+ return 1;
+ return 0;
+}
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index a3b7a50562b..dba68db629b 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -100,9 +100,7 @@ ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
return ide_started;
case ATA_PROT_DMA:
- if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
- ide_build_sglist(drive, cmd) == 0 ||
- dma_ops->dma_setup(drive, cmd))
+ if (ide_dma_prepare(drive, cmd))
return ide_stopped;
hwif->expiry = dma_ops->dma_timer_expiry;
ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index b6c4942fde1..78892e2a432 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1443,7 +1443,8 @@ ide_startstop_t ide_dma_intr(ide_drive_t *);
int ide_allocate_dma_engine(ide_hwif_t *);
void ide_release_dma_engine(ide_hwif_t *);
-int ide_build_sglist(ide_drive_t *, struct ide_cmd *);
+int ide_dma_prepare(ide_drive_t *, struct ide_cmd *);
+
void ide_destroy_dmatable(ide_drive_t *);
#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
@@ -1477,8 +1478,8 @@ static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
static inline ide_startstop_t ide_dma_intr(ide_drive_t *drive) { return ide_stopped; }
static inline ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error) { return ide_stopped; }
static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
-static inline int ide_build_sglist(ide_drive_t *drive,
- struct ide_cmd *cmd) { return 0; }
+static inline int ide_dma_prepare(ide_drive_t *drive,
+ struct ide_cmd *cmd) { return 1; }
static inline void ide_destroy_dmatable(ide_drive_t *drive) { ; }
#endif /* CONFIG_BLK_DEV_IDEDMA */