scsi: aacraid: check adapter health

Currently driver waits for the command IOCTL from the firmware and if the
firmware enters nonresponsive state, the driver doesn't respond till the
firmware is responsive again.

Check that firmware is alive, otherwise return -EBUSY.

[mkp: clarified commit desc]

Link: https://lore.kernel.org/r/1571120524-6037-6-git-send-email-balsundar.p@microsemi.com
Signed-off-by: Balsundar P <balsundar.p@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 40f78509ca945948d66225d88a40334674b6d9b9..55a55c56fea904c827aaaf97d928bc4e3cd54cab 100644 (file)
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -612,9 +612,13 @@ static struct device_attribute *aac_dev_attrs[] = {
 static int aac_ioctl(struct scsi_device *sdev, unsigned int cmd,
                     void __user *arg)
 {
+       int retval;
        struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
        if (!capable(CAP_SYS_RAWIO))
                return -EPERM;
+       retval = aac_adapter_check_health(dev);
+       if (retval)
+               return -EBUSY;
        return aac_do_ioctl(dev, cmd, arg);
 }