linux-kernel - [PATCH 3.14 19/21] ipr: Clear interrupt on croc/crocodile when running with LSI

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Date:	Mon,  8 Aug 2016 21:09:50 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Brian King <brking@...ux.vnet.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 3.14 19/21] ipr: Clear interrupt on croc/crocodile when running with LSI

3.14-stable 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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/ipr.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -9644,6 +9644,7 @@ 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");
 	}