[libata] Prevent warning during PMP error recovery

Cleanup sff_pio_task_link when a command is cancel while the
pio_task thread has been scheduled.

Signed-off-by: Gwendal Grignou <gwendal@google.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 996a7a57accc..c24127dd6ef2 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1333,6 +1333,7 @@ void ata_sff_flush_pio_task(struct ata_port *ap)
 
         cancel_delayed_work_sync(&ap->sff_pio_task);
         ap->hsm_task_state = HSM_ST_IDLE;
+        ap->sff_pio_task_link = NULL;
 
         if (ata_msg_ctl(ap))
                 ata_port_dbg(ap, "%s: EXIT\n", __func__);