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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-31 22:15:21 +0400
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-31 22:15:21 +0400
commit8a4a5738ba499083cf4c5668895efe220b1946d3 (patch)
tree78272b711b31f43526d2c665478cc3bdb0b6e393 /drivers/ide/alim15x3.c
parent7526efaafdc835b8d6b22aa1a302e14651373908 (diff)
downloadlinux-8a4a5738ba499083cf4c5668895efe220b1946d3.tar.xz
ide: add ->dma_check method
* Add (an optional) ->dma_check method for checking if DMA can be used for a given command and fail DMA setup in ide_dma_prepare() if necessary. * Convert alim15x3 and trm290 host drivers to use ->dma_check. * Rename ali15x3_dma_setup() to ali_dma_check() while at it. 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>
Diffstat (limited to 'drivers/ide/alim15x3.c')
-rw-r--r--drivers/ide/alim15x3.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c
index d3faf0b97f42..537da1cde16d 100644
--- a/drivers/ide/alim15x3.c
+++ b/drivers/ide/alim15x3.c
@@ -189,20 +189,20 @@ static void ali_set_dma_mode(ide_drive_t *drive, const u8 speed)
}
/**
- * ali15x3_dma_setup - begin a DMA phase
+ * ali_dma_check - DMA check
* @drive: target device
* @cmd: command
*
* Returns 1 if the DMA cannot be performed, zero on success.
*/
-static int ali15x3_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
+static int ali_dma_check(ide_drive_t *drive, struct ide_cmd *cmd)
{
if (m5229_revision < 0xC2 && drive->media != ide_disk) {
if (cmd->tf_flags & IDE_TFLAG_WRITE)
return 1; /* try PIO instead of DMA */
}
- return ide_dma_setup(drive, cmd);
+ return 0;
}
/**
@@ -503,11 +503,12 @@ static const struct ide_port_ops ali_port_ops = {
static const struct ide_dma_ops ali_dma_ops = {
.dma_host_set = ide_dma_host_set,
- .dma_setup = ali15x3_dma_setup,
+ .dma_setup = ide_dma_setup,
.dma_start = ide_dma_start,
.dma_end = ide_dma_end,
.dma_test_irq = ide_dma_test_irq,
.dma_lost_irq = ide_dma_lost_irq,
+ .dma_check = ali_dma_check,
.dma_timer_expiry = ide_dma_sff_timer_expiry,
.dma_sff_read_status = ide_dma_sff_read_status,
};