ipr: Clear interrupt on croc/crocodile when running with LSI

bjking1 · gregkh · commit 87271783380a · 2016-08-10T11:49:29.000+02:00
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 &lt;benh@kernel.crashing.org&gt;
Signed-off-by: Brian King &lt;brking@linux.vnet.ibm.com&gt;
Signed-off-by: Martin K. Petersen &lt;martin.petersen@oracle.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
@@ -10095,6 +10095,7 @@ 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");
 	}

Original file line number	Diff line number	Diff line change
`@@ -10095,6 +10095,7 @@ static int ipr_probe_ioa(struct pci_dev *pdev,`
`10095`	`10095`	`ioa_cfg->intr_flag = IPR_USE_MSI;`
`10096`	`10096`	`else {`
`10097`	`10097`	`ioa_cfg->intr_flag = IPR_USE_LSI;`
	`10098`	`+ ioa_cfg->clear_isr = 1;`
`10098`	`10099`	`ioa_cfg->nvectors = 1;`
`10099`	`10100`	`dev_info(&pdev->dev, "Cannot enable MSI.\n");`
`10100`	`10101`	`}`