linux-kernel - [PATCH 02/12] PCI/switchtec: Fix vep_vector

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Message-Id: <20200106190337.2428-3-logang@deltatee.com>
Date:   Mon,  6 Jan 2020 12:03:27 -0700
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Kelvin.Cao@...rochip.com, Eric Pilmore <epilmore@...aio.com>,
        Doug Meyer <dmeyer@...aio.com>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: [PATCH 02/12] PCI/switchtec: Fix vep_vector_number ioread width

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")
Reported-by: Doug Meyer <dmeyer@...aio.com>
Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
---
 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 2bf670977b9c..9c3ad09d3022 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -1276,7 +1276,7 @@ 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;
 
-- 
2.20.1