From: Logan Gunthorpe logang@deltatee.com
[ Upstream commit 9375646b4cf03aee81bc6c305aa18cc80b682796 ]
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 dmeyer@gigaio.com Signed-off-by: Logan Gunthorpe logang@deltatee.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 ceb7ab3ba3d09..43431816412c1 100644 --- a/drivers/pci/switch/switchtec.c +++ b/drivers/pci/switch/switchtec.c @@ -1186,7 +1186,7 @@ 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;