linux-kernel - [PATCH 3.19 089/101] [media] media: s5p-mfc: fix mmap support for 64bit arch

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Date:	Fri, 17 Apr 2015 15:29:17 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kamil Debski <k.debski@...sung.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Subject: [PATCH 3.19 089/101] [media] media: s5p-mfc: fix mmap support for 64bit arch

3.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Marek Szyprowski <m.szyprowski@...sung.com>

commit 05b676ab42f624425d5f6519276e506b812fa058 upstream.

TASK_SIZE is depends on the systems architecture (32 or 64 bits) and it
should not be used for defining offset boundary for mmaping buffers for
CAPTURE and OUTPUT queues. This patch fixes support for MMAP calls on
the CAPTURE queue on 64bit architectures (like ARM64).

Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
Signed-off-by: Kamil Debski <k.debski@...sung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/platform/s5p-mfc/s5p_mfc_common.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/platform/s5p-mfc/s5p_mfc_common.h
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_common.h
@@ -29,7 +29,7 @@
 
 /* Offset base used to differentiate between CAPTURE and OUTPUT
 *  while mmaping */
-#define DST_QUEUE_OFF_BASE      (TASK_SIZE / 2)
+#define DST_QUEUE_OFF_BASE	(1 << 30)
 
 #define MFC_BANK1_ALLOC_CTX	0
 #define MFC_BANK2_ALLOC_CTX	1


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