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authorAaron Lu <aaron.lu@intel.com>2012-12-03 11:35:02 +0800
committerJeff Garzik <jgarzik@redhat.com>2012-12-03 05:07:13 -0500
commit5416912af75de9cba5d1c75b99a7888b0bbbd2fb (patch)
tree9260eee97844fa1fb4ae8c7a6524af69457f9381
parentf295be25a0e7baeda1e338aeb84e16b727b78c7e (diff)
downloadlinux-linaro-stable-5416912af75de9cba5d1c75b99a7888b0bbbd2fb.tar.gz
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>
-rw-r--r--drivers/ata/libata-core.c1
-rw-r--r--drivers/ata/libata-eh.c1
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