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    Subject[PATCH 5.4 16/96] PCI/switchtec: Fix vep_vector_number ioread width
    Date
    From: Logan Gunthorpe <logang@deltatee.com>

    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 <dmeyer@gigaio.com>
    Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
    Signed-off-by: Bjorn Helgaas <bhelgaas@google.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
    @@ -1276,7 +1276,7 @@ static int switchtec_init_isr(struct swi
    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;


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