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libata: Implement ATA_FLAG_NO_DIPM and apply it to mcp65

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NVIDIA mcp65 familiy of controllers cause command timeouts when DIPM
is used.  Implement ATA_FLAG_NO_DIPM and apply it.

This problem was reported by Stefan Bader in the following thread.

 http://thread.gmane.org/gmane.linux.ide/48841

stable: applicable to 2.6.37 and 38.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Stefan Bader <stefan.bader@canonical.com>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Tejun Heo
2011-03-16 11:14:55 +01:00
committed by Jeff Garzik
parent 3f7ac1d667
commit ae01b2493c
3 changed files with 6 additions and 3 deletions
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include/linux/libata.h
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@@ -196,6 +196,7 @@ enum {
* management */
ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
* led */
ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
/* bits 24:31 of ap->flags are reserved for LLD specific flags */