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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>
This commit is contained in:
Andy Shevchenko 2015-11-17 13:34:26 +02:00 committed by Vinod Koul
parent 95da0c19d1
commit f94cf9f4c5
1 changed files with 4 additions and 1 deletions
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5
drivers/dma/acpi-dma.c
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@ -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",