diff options
author | Tejun Heo <htejun@gmail.com> | 2007-06-08 20:46:55 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-09 00:23:33 (GMT) |
commit | 51b94d2a5a90d4800e74d7348bcde098a28f4fb3 (patch) | |
tree | 0d72d28e03d0c0136965e143c942ae79db8b1bdb /kernel | |
parent | 7b4dc1fdb868089ab60c09531d476284b71373e3 (diff) | |
download | linux-fsl-qoriq-51b94d2a5a90d4800e74d7348bcde098a28f4fb3.tar.xz |
sata_promise: use TF interface for polling NODATA commands
sata_promise uses two different command modes - packet and TF. Packet mode
is intelligent low-overhead mode while TF is the same old taskfile
interface. As with other advanced interface (ahci/sil24),
ATA_TFLAG_POLLING has no effect in packet mode. However, PIO commands are
issued using TF interface in polling mode, so pdc_interrupt() considers
interrupts spurious if ATA_TFLAG_POLLING is set.
This is broken for polling NODATA commands because command is issued using
packet mode but the interrupt handler ignores it due to ATA_TFLAG_POLLING.
Fix pdc_qc_issue_prot() such that ATA/ATAPI NODATA commands are issued
using TF interface if ATA_TFLAG_POLLING is set.
This patch fixes detection failure introduced by polling SETXFERMODE.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Mikael Pettersson <mikpe@it.uu.se>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions