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[media] cx25821: off by one in cx25821_vidioc_s_input()

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If "i" is 2 then when we call cx25821_video_mux() we'd end up going
past the end of the cx25821_boards[dev->board]->input[].

The INPUT() macro obfuscates what's going on in that function so it's
a bit hard to follow.  And as Mauro points out the hard coded 2 is
not very helpful.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Dan Carpenter 2011-10-13 02:41:41 -03:00 • committed by Mauro Carvalho Chehab
parent 8c4343e590
commit 567a23f438
2 changed files with 3 additions and 2 deletions
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2
drivers/media/video/cx25821/cx25821-video.c
View file

@ -1312,7 +1312,7 @@ int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i)
return err; return err;
} }
if (i > 2) { if (i >= CX25821_NR_INPUT) {
dprintk(1, "%s(): -EINVAL\n", __func__); dprintk(1, "%s(): -EINVAL\n", __func__);
return -EINVAL; return -EINVAL;
} }

3
drivers/media/video/cx25821/cx25821.h
View file

@ -98,6 +98,7 @@
#define CX25821_BOARD_CONEXANT_ATHENA10 1 #define CX25821_BOARD_CONEXANT_ATHENA10 1
#define MAX_VID_CHANNEL_NUM 12 #define MAX_VID_CHANNEL_NUM 12
#define VID_CHANNEL_NUM 8 #define VID_CHANNEL_NUM 8
#define CX25821_NR_INPUT 2
struct cx25821_fmt { struct cx25821_fmt {
char *name; char *name;
@ -196,7 +197,7 @@ struct cx25821_board {
unsigned char radio_addr; unsigned char radio_addr;
u32 clk_freq; u32 clk_freq;
struct cx25821_input input[2]; struct cx25821_input input[CX25821_NR_INPUT];
}; };
struct cx25821_subid { struct cx25821_subid {