linux-kernel - [PATCH 3.12 044/100] ipr: Clear interrupt on croc/crocodile when running with LSI

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Date:   Fri, 19 Aug 2016 09:10:43 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Brian King <brking@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 044/100] ipr: Clear interrupt on croc/crocodile when running with LSI

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

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

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: Jiri Slaby <jslaby@...e.cz>
---
 drivers/scsi/ipr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index d4473d2f8739..676c03e63cae 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -9644,6 +9644,7 @@ static int ipr_probe_ioa(struct pci_dev *pdev,
 		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");
 	}
-- 
2.9.3