linux-kernel - [PATCH 3.16 248/305] ipr: Clear interrupt on croc/crocodile when running with LSI

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Message-ID: <lsq.1471110171.29000268@decadent.org.uk>
Date:	Sat, 13 Aug 2016 18:42:51 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	"Benjamin Herrenschmidt" <benh@...nel.crashing.org>,
	"Brian King" <brking@...ux.vnet.ibm.com>
Subject: [PATCH 3.16 248/305] ipr: Clear interrupt on croc/crocodile when
 running with LSI

3.16.37-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Brian King <brking@...ux.vnet.ibm.com>

commit 54e430bbd490e18ab116afa4cd90dcc45787b3df upstream.

If we fall back to using LSI on the Croc or Crocodile chip we need to
clear the interrupt so we don't hang the system.

Tested-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Signed-off-by: Brian King <brking@...ux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/scsi/ipr.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -9753,6 +9753,7 @@ static int ipr_probe_ioa(struct pci_dev
 		ioa_cfg->intr_flag = IPR_USE_MSI;
 	else {
 		ioa_cfg->intr_flag = IPR_USE_LSI;
+		ioa_cfg->clear_isr = 1;
 		ioa_cfg->nvectors = 1;
 		dev_info(&pdev->dev, "Cannot enable MSI.\n");
 	}