From: Stephen Cameron <stephenmcameron@gmail.com>
Date: Fri, 23 Jan 2015 22:44:07 +0000 (-0600)
Subject: hpsa: do not ack controller events on controllers that do not support it
X-Git-Tag: v4.0-rc1~126^2~21
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e4aa3e6ae2a82ecfce7eecc6c52dcaba7b9e3f84;p=karo-tx-linux.git

hpsa: do not ack controller events on controllers that do not support it

Acking controller events on controllers that do not support
it can cause such controllers to lock up.

Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Signed-off-by: Joe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 5abd49d85940..afd192d2d27d 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -6674,6 +6674,9 @@ static void hpsa_ack_ctlr_events(struct ctlr_info *h)
 	int i;
 	char *event_type;
 
+	if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
+		return;
+
 	/* Ask the controller to clear the events we're handling. */
 	if ((h->transMethod & (CFGTBL_Trans_io_accel1
 			| CFGTBL_Trans_io_accel2)) &&