libata: Fall back to unqueued READ LOG EXT if the DMA variant fails

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Some devices advertise support for the READ/WRITE LOG DMA EXT commands
but fail when we try to issue them. This can lead to queued TRIM being
unintentionally disabled since the relevant feature flag is located in a
general purpose log page.

Fall back to unqueued READ LOG EXT if the DMA variant fails while
reading a log page.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Martin K. Petersen 2015-05-04 21:54:21 -04:00 • committed by Tejun Heo

parent 406c057c4e

commit 5d3abf8ff6

2 changed files with 12 additions and 1 deletions

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12

drivers/ata/libata-eh.c

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1

include/linux/libata.h

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