diff options
| author | Aaron Lu <aaron.lu@intel.com> | 2012-12-03 04:35:02 +0100 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2012-12-03 11:07:13 +0100 |
| commit | 5416912af75de9cba5d1c75b99a7888b0bbbd2fb (patch) | |
| tree | 9260eee97844fa1fb4ae8c7a6524af69457f9381 /drivers | |
| parent | ata_piix: re-order code and remove prototypes (diff) | |
| download | linux-5416912af75de9cba5d1c75b99a7888b0bbbd2fb.tar.xz linux-5416912af75de9cba5d1c75b99a7888b0bbbd2fb.zip | |
libata: set dma_mode to 0xff in reset
ata_device->dma_mode's initial value is zero, which is not a valid dma
mode, but ata_dma_enabled will return true for this value. This patch
sets dma_mode to 0xff in reset function, so that ata_dma_enabled will
not return true for this case, or it will cause problem for pata_acpi.
The corrsponding bugzilla page is at:
https://bugzilla.kernel.org/show_bug.cgi?id=49151
Reported-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Tested-by: Szymon Janc <szymon@janc.net.pl>
Tested-by: Dutra Julio <dutra.julio@gmail.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Cc: <stable@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/libata-core.c | 1 | ||||
| -rw-r--r-- | drivers/ata/libata-eh.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index caffe73c1e4a..583f26d6d455 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -2559,6 +2559,7 @@ int ata_bus_probe(struct ata_port *ap) * bus as we may be talking too fast. */ dev->pio_mode = XFER_PIO_0; + dev->dma_mode = 0xff; /* If the controller has a pio mode setup function * then use it to set the chipset to rights. Don't diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index e60437cd0d19..bf039b0e97b7 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2657,6 +2657,7 @@ int ata_eh_reset(struct ata_link *link, int classify, * bus as we may be talking too fast. */ dev->pio_mode = XFER_PIO_0; + dev->dma_mode = 0xff; /* If the controller has a pio mode setup function * then use it to set the chipset to rights. Don't |