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Commit f94cf9f4 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Vinod Koul
Browse files

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: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 95da0c19

drivers/dma/acpi-dma.c

+4 −1
Original line number Diff line number Diff line
@@ -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",