[PATCH] libata: hold host_set lock while finishing internal qc

Hold host_set lock while finishing internal qc.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 86cd0e0895d..13bce43f191 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1031,6 +1031,9 @@ unsigned ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
                 spin_unlock_irqrestore(&ap->host_set->lock, flags);
         }
 
+        /* finish up */
+        spin_lock_irqsave(&ap->host_set->lock, flags);
+
         *tf = qc->tf;
         err_mask = qc->err_mask;
 
@@ -1052,6 +1055,8 @@ unsigned ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
                 ata_port_probe(ap);
         }
 
+        spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
         return err_mask;
 }