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authorHans Verkuil <hverkuil@xs4all.nl>2009-02-18 12:22:16 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-03-30 12:42:54 -0300
commit674a323218ab0b0be100b51c251a72787b5c9e3a (patch)
tree6e69635ebea119dca9de7236550d5977220ce3f6 /drivers/media/video/saa7115.c
parent10afbef15e7bba5e1008f583852077743d28c395 (diff)
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V4L/DVB (10700): saa7115: don't access reg 0x87 if it is not present.
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>
Diffstat (limited to 'drivers/media/video/saa7115.c')
-rw-r--r--drivers/media/video/saa7115.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/media/video/saa7115.c b/drivers/media/video/saa7115.c
index a845582ca5d4..b1c5f63bb77a 100644
--- 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;
}