[SCSI] aacraid: OS panic after Adapter panic (hardening).

In experiments in the lab we managed to trigger an Adapter firmware
panic (BlinkLED) coincidentally while several pass-through ioctl
command from the management software were outstanding on a bug only
present on a class of RAID Adapters that require a hardware reset
rather than a commanded reset. The net result was an attempt to time
out the management software command as if it came from the SCSI layer
resulting in an OS panic.

Adapters that use commanded reset, management commands are returned
failed by the Adapter correctly. The adapter firmware panic that
resulted in this condition was also resolved, and there were no
adapters in the field with this specific firmware bug so we do not
expect any field reports. This is a rare or unlikely corner condition,
and no reports have ever been forwarded from the field.

Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/scsi/aacraid/dpcsup.c b/drivers/scsi/aacraid/dpcsup.c
index 4726ab666c52..d1163ded132b 100644
--- a/drivers/scsi/aacraid/dpcsup.c
+++ b/drivers/scsi/aacraid/dpcsup.c
@@ -120,6 +120,7 @@ unsigned int aac_response_normal(struct aac_queue * q)
                          *      NOTE:  we cannot touch the fib after this
                          *          call, because it may have been deallocated.
                          */
+                        fib->flags = 0;
                         fib->callback(fib->callback_data, fib);
                 } else {
                         unsigned long flagv;
@@ -229,7 +230,7 @@ unsigned int aac_command_normal(struct aac_queue *q)
  *      all QE there are and wake up all the waiters before exiting.
  */
 
-unsigned int aac_intr_normal(struct aac_dev *dev, u32 index)
+unsigned int aac_intr_normal(struct aac_dev * dev, u32 index)
 {
         dprintk((KERN_INFO "aac_intr_normal(%p,%x)\n", dev, index));
         if ((index & 0x00000002L)) {
@@ -313,6 +314,7 @@ unsigned int aac_intr_normal(struct aac_dev *dev, u32 index)
                          *      NOTE:  we cannot touch the fib after this
                          *          call, because it may have been deallocated.
                          */
+                        fib->flags = 0;
                         fib->callback(fib->callback_data, fib);
                 } else {
                         unsigned long flagv;