dmaengine: acpi-dma: check for 64-bit MMIO address

Currently the match DMA controller is done only for lower 32 bits of
address which might be not true on 64-bit platform. Check upper portion
as well.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c
index 16d0daa058a5..eed6bda01790 100644
--- a/drivers/dma/acpi-dma.c
+++ b/drivers/dma/acpi-dma.c
@@ -15,6 +15,7 @@
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/module.h>
+#include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
@@ -72,7 +73,9 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
         si = (const struct acpi_csrt_shared_info *)&grp[1];
 
         /* Match device by MMIO and IRQ */
-        if (si->mmio_base_low != mem || si->gsi_interrupt != irq)
+        if (si->mmio_base_low != lower_32_bits(mem) ||
+            si->mmio_base_high != upper_32_bits(mem) ||
+            si->gsi_interrupt != irq)
                 return 0;
 
         dev_dbg(&adev->dev, "matches with %.4s%04X (rev %u)\n",