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    Subject[PATCH 4.19 082/114] PCI/switchtec: Read all 64 bits of part_event_bitmap
    Date
    From: Logan Gunthorpe <logang@deltatee.com>

    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>


    ---
    drivers/pci/switch/switchtec.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/pci/switch/switchtec.c
    +++ b/drivers/pci/switch/switchtec.c
    @@ -633,7 +633,7 @@ static int ioctl_event_summary(struct sw
    u32 reg;

    s.global = ioread32(&stdev->mmio_sw_event->global_summary);
    - s.part_bitmap = ioread32(&stdev->mmio_sw_event->part_event_bitmap);
    + s.part_bitmap = readq(&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++) {

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