libata: track SLEEP state and issue SRST to wake it up

ATA devices in SLEEP mode don't respond to any commands.  SRST is
necessary to wake it up.  Till now, when a command is issued to a
device in SLEEP mode, the command times out, which makes EH reset the
device and retry the command after that, causing a long delay.

This patch makes libata track SLEEP state and issue SRST automatically
if a command is about to be issued to a device in SLEEP.

Signed-off-by: Tejun Heo <[email protected]>
Cc: Bruce Allen <[email protected]>
Cc: Andrew Paprocki <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>

0 files changed, 0 insertions, 0 deletions