Bartlomiej Zolnierkiewicz wrote:
Code intended to check DMA status was checking DMA command register.
Moreover firmware seems to "forget" to set DMA capable bit for the
slave device (at least in RAID mode but without ITE RAID volumes) so
check device ID for DMA capable bit when deciding whether to use DMA
and remove DMA status check completely.
Thanks to Pavol Šimo for the bugreport and testing the initial fix.
This change unfortunately still doesn't fix DMA in RAID mode (which
works fine with IDE it821x) but Alan is working on the missing pieces
(pata_it821x vs libata EH issues).
Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Cc: Tejun Heo <htejun@xxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ata/pata_it821x.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
Patch is OK but it's mangled by your mailer:
@@ -79,7 +80,7 @@
=20
=20
#define DRV_NAME "pata_it821x"
=2D#define DRV_VERSION "0.3.6"
+#define DRV_VERSION "0.3.7"
=20
struct it821x_dev
{
@@ -460,14 +461,8 @@ static unsigned int it821x_passthru_qc_i
=20
=2D int dma_enabled =3D 0;
int i;
=20
etc.
-
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