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Commit 7a7cd192 authored by Oliver Endriss's avatar Oliver Endriss Committed by Mauro Carvalho Chehab
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V4L/DVB (5441): Saa7146: Fix allocation of clipping memory 



Olaf Hering pointed out that SAA7146_CLIPPING_MEM would become
very large for PAGE_SIZE > 4K.
In fact, the number of clipping windows is limited to 16,
and calculate_clipping_registers_rect() does not use more
than 256 bytes. SAA7146_CLIPPING_MEM adjusted accordingly.

Thanks-to: Olaf Hering <olaf@aepfle.de>
Acked-by: default avatarMichael Hunold <hunold@linuxtv.org>
Signed-off-by: default avatarOliver Endriss <o.endriss@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 21b48a70

include/media/saa7146_vv.h

+2 −1
Original line number Diff line number Diff line
@@ -239,7 +239,8 @@ void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits); 
#define SAA7146_HPS_SYNC_PORT_B		0x01



/* some memory sizes */

#define SAA7146_CLIPPING_MEM	(14*PAGE_SIZE)

/* max. 16 clipping rectangles */

#define SAA7146_CLIPPING_MEM	(16 * 4 * sizeof(u32))



/* some defines for the various clipping-modes */

#define SAA7146_CLIPPING_RECT		0x4