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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-02-17 02:40:25 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-02-17 02:40:25 +0100
commit7569e8dc2213ecc47024ea5edbadc8736487d926 (patch)
tree44c47e85b5e87c75972c077da31f198c4f597688 /drivers/ide/ide-dma.c
parent056a697b7388844a1341e92e277bff8e5bf61ec9 (diff)
ide: add ide_use_fast_pio() helper (v3)
* add ide_use_fast_pio() helper for use by host drivers * add DMA capability and hwif->autodma checks to ide_use_dma() - au1xxx-ide/it8213/it821x drivers didn't check for (id->capability & 1) [ for the IT8211/2 in SMART mode this check shouldn't be made but since in it821x_fixups() we set DMA bit explicitly: if(strstr(id->model, "Integrated Technology Express")) { /* In raid mode the ident block is slightly buggy We need to set the bits so that the IDE layer knows LBA28. LBA48 and DMA ar valid */ id->capability |= 3; /* LBA28, DMA */ we are better off using generic helper if we can ] - ide-cris driver didn't set ->autodma [ before the patch hwif->autodma was only checked in the chipset specific hwif->ide_dma_check implementations, for ide-cris it is cris_dma_check() function so there no behavior change here ] v2: * updated patch description (thanks to Alan Cox for the feedback) v3: * updated for scc_pata driver Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-dma.c')
-rw-r--r--drivers/ide/ide-dma.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 56efed6742d4..941846c21624 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -680,6 +680,9 @@ int ide_use_dma(ide_drive_t *drive)
struct hd_driveid *id = drive->id;
ide_hwif_t *hwif = drive->hwif;
+ if ((id->capability & 1) == 0 || drive->autodma == 0)
+ return 0;
+
/* consult the list of known "bad" drives */
if (__ide_dma_bad_drive(drive))
return 0;