From b642fb092de14eb6ed760f5fb7ceb160ec6bee98 Mon Sep 17 00:00:00 2001 From: Logan Gunthorpe Date: Mon, 6 Jan 2020 12:03:27 -0700 Subject: [PATCH] PCI/switchtec: Fix vep_vector_number ioread width commit 9375646b4cf03aee81bc6c305aa18cc80b682796 upstream. vep_vector_number is actually a 16 bit register which should be read with ioread16() instead of ioread32(). Fixes: 080b47def5e5 ("MicroSemi Switchtec management interface driver") Link: https://lore.kernel.org/r/20200106190337.2428-3-logang@deltatee.com Reported-by: Doug Meyer Signed-off-by: Logan Gunthorpe Signed-off-by: Bjorn Helgaas Signed-off-by: Greg Kroah-Hartman --- drivers/pci/switch/switchtec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c index 73dba2739849..bf229b442e72 100644 --- a/drivers/pci/switch/switchtec.c +++ b/drivers/pci/switch/switchtec.c @@ -1399,7 +1399,7 @@ static int switchtec_init_isr(struct switchtec_dev *stdev) if (nvecs < 0) return nvecs; - event_irq = ioread32(&stdev->mmio_part_cfg->vep_vector_number); + event_irq = ioread16(&stdev->mmio_part_cfg->vep_vector_number); if (event_irq < 0 || event_irq >= nvecs) return -EFAULT;