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

BugLink: http://bugs.launchpad.net/bugs/1746801
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: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit d1471eb0faef9edd65cd44c1a3c1ff13c251fead)
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>

diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index 1bc623ad3fafabd7025ce759c22aed725aa3bad5..9eff246ba3a30999683a62e2373d0aff32334abd 100644 (file)
--- a/drivers/scsi/aacraid/comminit.c
+++ b/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);