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 Cc: Bjorn Helgaas bhelgaas@google.com Cc: stable@vger.kernel.org # v4.12+ Cc: Kelvin Cao Kelvin.Cao@microchip.com Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org ---
ioread64() was introduced in v5.1 so the upstream patch won't compile on stable versions 4.14 or 4.19. This is the same patch but uses readq() which should be equivalent.
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 e3aefdafae89..7a788b759c86 100644 --- a/drivers/pci/switch/switchtec.c +++ b/drivers/pci/switch/switchtec.c @@ -898,7 +898,7 @@ static int ioctl_event_summary(struct switchtec_dev *stdev, 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++) { -- 2.20.1