From: Balsundar P <balsundar.p@microsemi.com>
Date: Tue, 15 Oct 2019 11:52:02 +0530
Subject: scsi: aacraid: check adapter health
Git-commit: 572ee53a9badf62f3973d66f6475f9ce69720a25
Patch-mainline: v5.5-rc1
References: jsc#SLE-15152

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>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/aacraid/linit.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 40f78509ca94..55a55c56fea9 100644
--- 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);
 }