Commit 9dadfb97 authored Nov 30, 2016 by Benjamin Herrenschmidt Committed by Martin K. Petersen Nov 30, 2016

scsi: ipr: Fix runaway IRQs when falling back from MSI to LSI



LSIs must be ack'ed with an MMIO otherwise they remain asserted
forever. This is controlled by the "clear_isr" flag.

While we set that flag properly when deciding initially whether to use
LSIs or MSIs, we fail to set it if we first chose MSIs, the test fails,
then fallback to LSIs.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

parent af25756d

drivers/scsi/ipr.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -10157,6 +10157,7 @@ static int ipr_probe_ioa(struct pci_dev *pdev,
		pci_free_irq_vectors(pdev);

		ioa_cfg->nvectors = 1;
		ioa_cfg->clear_isr = 1;
		break;
		default:
		goto out_msi_disable;

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