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authorVincent Pelletier <plr.vincent@gmail.com>2013-05-21 22:30:58 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-01-09 12:24:23 -0800
commit3d097b15182906eaf121c48697ceda0ab9ddf55e (patch)
tree8ed02a0a359761578bac38e94c59a3265188f5aa /include/linux/libata.h
parent6dcccce8791fa72bff307f6c2506d323705102cd (diff)
downloadlinux-linaro-stable-3d097b15182906eaf121c48697ceda0ab9ddf55e.tar.gz
libata: Add atapi_dmadir force flag
commit 966fbe193f47c68e70a80ec9991098e88e7959cb upstream. Some device require DMADIR to be enabled, but are not detected as such by atapi_id_dmadir. One such example is "Asus Serillel 2" SATA-host-to-PATA-device bridge: the bridge itself requires DMADIR, even if the bridged device does not. As atapi_dmadir module parameter can cause problems with some devices (as per Tejun Heo's memory), enabling it globally may not be possible depending on the hardware. This patch adds atapi_dmadir in the form of a "force" horkage value, allowing global, per-bus and per-device control. Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/libata.h')
-rw-r--r--include/linux/libata.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index eae7a053dc51..9a4c194ebc8a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -399,6 +399,7 @@ enum {
ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
+ ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */
/* DMA mask for user DMA control: User visible values; DO NOT
renumber */