scsi: aacraid: Allow reset_host sysfs var to recover Panicked Fw

It is possible to restart the controller via the use of the reset_host
sysfs variable. This does work for controllers that can no longer respond,
since driver will attempt to send down a shutdown in this path.

Check if the controller is able to receive commands before sending down
a shutdown
Signed-off-by: NRaghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aacraid/comminit.c

@@ -295,12 +295,10 @@ int aac_send_shutdown(struct aac_dev * dev)
 {
 	struct fib * fibctx;
 	struct aac_close *cmd;
-	int status;
+	int status = 0;
 
-	fibctx = aac_fib_alloc(dev);
-	if (!fibctx)
-		return -ENOMEM;
-	aac_fib_init(fibctx);
+	if (aac_adapter_check_health(dev))
+		return status;
 
 	if (!dev->adapter_shutdown) {
 		mutex_lock(&dev->ioctl_mutex);
@@ -308,6 +306,11 @@ int aac_send_shutdown(struct aac_dev * dev)
 		mutex_unlock(&dev->ioctl_mutex);
 	}
 
+	fibctx = aac_fib_alloc(dev);
+	if (!fibctx)
+		return -ENOMEM;
+	aac_fib_init(fibctx);
+
 	cmd = (struct aac_close *) fib_data(fibctx);
 	cmd->command = cpu_to_le32(VM_CloseAll);
 	cmd->cid = cpu_to_le32(0xfffffffe);