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V4L/DVB (10700): saa7115: don't access reg 0x87 if it is not present.
author
Hans Verkuil
<hverkuil@xs4all.nl>
Wed, 18 Feb 2009 15:22:16 +0000
(12:22 -0300)
committer
Mauro Carvalho Chehab
<mchehab@redhat.com>
Mon, 30 Mar 2009 15:42:54 +0000
(12:42 -0300)
Devices like the saa7111 do not have this register, so check for this
before using it.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
drivers/media/video/saa7115.c
patch
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diff --git
a/drivers/media/video/saa7115.c
b/drivers/media/video/saa7115.c
index
a845582
..
b1c5f63
100644
(file)
--- a/
drivers/media/video/saa7115.c
+++ b/
drivers/media/video/saa7115.c
@@
-1310,11
+1310,12
@@
static int saa711x_s_stream(struct v4l2_subdev *sd, int enable)
v4l2_dbg(1, debug, sd, "%s output\n",
enable ? "enable" : "disable");
- if (state->enable != enable) {
- state->enable = enable;
- saa711x_write(sd, R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED,
- state->enable);
- }
+ if (state->enable == enable)
+ return 0;
+ state->enable = enable;
+ if (!saa711x_has_reg(state->ident, R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED))
+ return 0;
+ saa711x_write(sd, R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED, state->enable);
return 0;
}