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[PATCH] libata: implement ata_eh_wait()

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Implement ata_eh_wait().  On return from this function, it's
guaranteed that the EH which was pending or in progress when the
function was called is complete - including the tailing part of SCSI
EH.  This will be used by hotplug and others to synchronize with EH.

Signed-off-by: Tejun Heo <htejun@gmail.com>
This commit is contained in:
Tejun Heo 2006-05-31 18:27:27 +09:00
parent 7395acb2c8
commit c6cf9e99d1
4 changed files with 42 additions and 0 deletions
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2
include/linux/libata.h
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@ -157,6 +157,7 @@ enum {
ATA_FLAG_FLUSH_PORT_TASK = (1 << 14), /* flush port task */
ATA_FLAG_EH_PENDING = (1 << 15), /* EH pending */
ATA_FLAG_EH_IN_PROGRESS = (1 << 16), /* EH in progress */
ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */
ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */
@ -490,6 +491,7 @@ struct ata_port {
u32 msg_enable;
struct list_head eh_done_q;
wait_queue_head_t eh_wait_q;
void *private_data;