PCI/switchtec: Read all 64 bits of part_event_bitmap

BugLink: https://bugs.launchpad.net/bugs/1858427
commit 6acdf7e19b37cb3a9258603d0eab315079c19c5e upstream.

The part_event_bitmap register is 64 bits wide, so read it with ioread64()
instead of the 32-bit ioread32().

Fixes: 52eabba5bcdb ("switchtec: Add IOCTLs to the Switchtec driver")
Link: https://lore.kernel.org/r/20190910195833.3891-1-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>
Cc: stable@vger.kernel.org	# v4.12+
Cc: Kelvin Cao <Kelvin.Cao@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>

diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index 8c94cd3fd1f2148cf39f48c540db87122f3f11fb..465d6afd826e86937fb9c0d8706718cf9146baf1 100644 (file)
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -675,7 +675,7 @@ static int ioctl_event_summary(struct switchtec_dev *stdev,
                return -ENOMEM;
 
        s->global = ioread32(&stdev->mmio_sw_event->global_summary);
-       s->part_bitmap = ioread32(&stdev->mmio_sw_event->part_event_bitmap);
+       s->part_bitmap = ioread64(&stdev->mmio_sw_event->part_event_bitmap);
        s->local_part = ioread32(&stdev->mmio_part_cfg->part_event_summary);
 
        for (i = 0; i < stdev->partition_count; i++) {