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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2018-02-19 18:23:39 (GMT)
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2018-02-23 10:34:36 (GMT)
commit0e0751a4b9ee82ff086472ab4e81ee693fbe091a (patch)
treeb757f4589ac25928170ada738221c965ecfdc68b
parenta3938f1b749cbedf47c4cb6af08f1c29e9418007 (diff)
media: Don't let tvp5150_get_vbi() go out of vbi_ram_default arrayold/cs_0e0751a4b9ee
As pointed by Dan, possible values for bits[3:0] of te Line Mode Registers can range from 0x0 to 0xf, but the check logic allow values ranging from 0x0 to 0xe. As static arrays are initialized with zero, using a value without an explicit initializer at the array won't cause any harm. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
-rw-r--r--drivers/media/i2c/tvp5150.c88
1 files changed, 45 insertions, 43 deletions
diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index 3c18519..2476d81 100644
--- a/drivers/media/i2c/tvp5150.c
+++ b/drivers/media/i2c/tvp5150.c
@@ -505,80 +505,77 @@ static struct i2c_vbi_ram_value vbi_ram_default[] =
/* FIXME: Current api doesn't handle all VBI types, those not
yet supported are placed under #if 0 */
#if 0
- {0x010, /* Teletext, SECAM, WST System A */
+ [0] = {0x010, /* Teletext, SECAM, WST System A */
{V4L2_SLICED_TELETEXT_SECAM,6,23,1},
{ 0xaa, 0xaa, 0xff, 0xff, 0xe7, 0x2e, 0x20, 0x26,
0xe6, 0xb4, 0x0e, 0x00, 0x00, 0x00, 0x10, 0x00 }
},
#endif
- {0x030, /* Teletext, PAL, WST System B */
+ [1] = {0x030, /* Teletext, PAL, WST System B */
{V4L2_SLICED_TELETEXT_B,6,22,1},
{ 0xaa, 0xaa, 0xff, 0xff, 0x27, 0x2e, 0x20, 0x2b,
0xa6, 0x72, 0x10, 0x00, 0x00, 0x00, 0x10, 0x00 }
},
#if 0
- {0x050, /* Teletext, PAL, WST System C */
+ [2] = {0x050, /* Teletext, PAL, WST System C */
{V4L2_SLICED_TELETEXT_PAL_C,6,22,1},
{ 0xaa, 0xaa, 0xff, 0xff, 0xe7, 0x2e, 0x20, 0x22,
0xa6, 0x98, 0x0d, 0x00, 0x00, 0x00, 0x10, 0x00 }
},
- {0x070, /* Teletext, NTSC, WST System B */
+ [3] = {0x070, /* Teletext, NTSC, WST System B */
{V4L2_SLICED_TELETEXT_NTSC_B,10,21,1},
{ 0xaa, 0xaa, 0xff, 0xff, 0x27, 0x2e, 0x20, 0x23,
0x69, 0x93, 0x0d, 0x00, 0x00, 0x00, 0x10, 0x00 }
},
- {0x090, /* Tetetext, NTSC NABTS System C */
+ [4] = {0x090, /* Tetetext, NTSC NABTS System C */
{V4L2_SLICED_TELETEXT_NTSC_C,10,21,1},
{ 0xaa, 0xaa, 0xff, 0xff, 0xe7, 0x2e, 0x20, 0x22,
0x69, 0x93, 0x0d, 0x00, 0x00, 0x00, 0x15, 0x00 }
},
- {0x0b0, /* Teletext, NTSC-J, NABTS System D */
+ [5] = {0x0b0, /* Teletext, NTSC-J, NABTS System D */
{V4L2_SLICED_TELETEXT_NTSC_D,10,21,1},
{ 0xaa, 0xaa, 0xff, 0xff, 0xa7, 0x2e, 0x20, 0x23,
0x69, 0x93, 0x0d, 0x00, 0x00, 0x00, 0x10, 0x00 }
},
- {0x0d0, /* Closed Caption, PAL/SECAM */
+ [6] = {0x0d0, /* Closed Caption, PAL/SECAM */
{V4L2_SLICED_CAPTION_625,22,22,1},
{ 0xaa, 0x2a, 0xff, 0x3f, 0x04, 0x51, 0x6e, 0x02,
0xa6, 0x7b, 0x09, 0x00, 0x00, 0x00, 0x27, 0x00 }
},
#endif
- {0x0f0, /* Closed Caption, NTSC */
+ [7] = {0x0f0, /* Closed Caption, NTSC */
{V4L2_SLICED_CAPTION_525,21,21,1},
{ 0xaa, 0x2a, 0xff, 0x3f, 0x04, 0x51, 0x6e, 0x02,
0x69, 0x8c, 0x09, 0x00, 0x00, 0x00, 0x27, 0x00 }
},
- {0x110, /* Wide Screen Signal, PAL/SECAM */
+ [8] = {0x110, /* Wide Screen Signal, PAL/SECAM */
{V4L2_SLICED_WSS_625,23,23,1},
{ 0x5b, 0x55, 0xc5, 0xff, 0x00, 0x71, 0x6e, 0x42,
0xa6, 0xcd, 0x0f, 0x00, 0x00, 0x00, 0x3a, 0x00 }
},
#if 0
- {0x130, /* Wide Screen Signal, NTSC C */
+ [9] = {0x130, /* Wide Screen Signal, NTSC C */
{V4L2_SLICED_WSS_525,20,20,1},
{ 0x38, 0x00, 0x3f, 0x00, 0x00, 0x71, 0x6e, 0x43,
0x69, 0x7c, 0x08, 0x00, 0x00, 0x00, 0x39, 0x00 }
},
- {0x150, /* Vertical Interval Timecode (VITC), PAL/SECAM */
+ [10] = {0x150, /* Vertical Interval Timecode (VITC), PAL/SECAM */
{V4l2_SLICED_VITC_625,6,22,0},
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0x6d, 0x49,
0xa6, 0x85, 0x08, 0x00, 0x00, 0x00, 0x4c, 0x00 }
},
- {0x170, /* Vertical Interval Timecode (VITC), NTSC */
+ [11] = {0x170, /* Vertical Interval Timecode (VITC), NTSC */
{V4l2_SLICED_VITC_525,10,20,0},
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0x6d, 0x49,
0x69, 0x94, 0x08, 0x00, 0x00, 0x00, 0x4c, 0x00 }
},
#endif
- {0x190, /* Video Program System (VPS), PAL */
+ [12] = {0x190, /* Video Program System (VPS), PAL */
{V4L2_SLICED_VPS,16,16,0},
{ 0xaa, 0xaa, 0xff, 0xff, 0xba, 0xce, 0x2b, 0x0d,
0xa6, 0xda, 0x0b, 0x00, 0x00, 0x00, 0x60, 0x00 }
},
/* 0x1d0 User programmable */
-
- /* End of struct */
- { (u16)-1 }
};
static int tvp5150_write_inittab(struct v4l2_subdev *sd,
@@ -591,10 +588,10 @@ static int tvp5150_write_inittab(struct v4l2_subdev *sd,
return 0;
}
-static int tvp5150_vdp_init(struct v4l2_subdev *sd,
- const struct i2c_vbi_ram_value *regs)
+static int tvp5150_vdp_init(struct v4l2_subdev *sd)
{
unsigned int i;
+ int j;
/* Disable Full Field */
tvp5150_write(sd, TVP5150_FULL_FIELD_ENA, 0);
@@ -604,14 +601,17 @@ static int tvp5150_vdp_init(struct v4l2_subdev *sd,
tvp5150_write(sd, i, 0xff);
/* Load Ram Table */
- while (regs->reg != (u16)-1) {
+ for (j = 0; j < ARRAY_SIZE(vbi_ram_default); j++) {
+ const struct i2c_vbi_ram_value *regs = &vbi_ram_default[j];
+
+ if (!regs->type.vbi_type)
+ continue;
+
tvp5150_write(sd, TVP5150_CONF_RAM_ADDR_HIGH, regs->reg >> 8);
tvp5150_write(sd, TVP5150_CONF_RAM_ADDR_LOW, regs->reg);
for (i = 0; i < 16; i++)
tvp5150_write(sd, TVP5150_VDP_CONF_RAM_DATA, regs->values[i]);
-
- regs++;
}
return 0;
}
@@ -620,19 +620,23 @@ static int tvp5150_vdp_init(struct v4l2_subdev *sd,
static int tvp5150_g_sliced_vbi_cap(struct v4l2_subdev *sd,
struct v4l2_sliced_vbi_cap *cap)
{
- const struct i2c_vbi_ram_value *regs = vbi_ram_default;
- int line;
+ int line, i;
dev_dbg_lvl(sd->dev, 1, debug, "g_sliced_vbi_cap\n");
memset(cap, 0, sizeof *cap);
- while (regs->reg != (u16)-1 ) {
- for (line=regs->type.ini_line;line<=regs->type.end_line;line++) {
+ for (i = 0; i < ARRAY_SIZE(vbi_ram_default); i++) {
+ const struct i2c_vbi_ram_value *regs = &vbi_ram_default[i];
+
+ if (!regs->type.vbi_type)
+ continue;
+
+ for (line = regs->type.ini_line;
+ line <= regs->type.end_line;
+ line++) {
cap->service_lines[0][line] |= regs->type.vbi_type;
}
cap->service_set |= regs->type.vbi_type;
-
- regs++;
}
return 0;
}
@@ -651,14 +655,13 @@ static int tvp5150_g_sliced_vbi_cap(struct v4l2_subdev *sd,
* MSB = field2
*/
static int tvp5150_set_vbi(struct v4l2_subdev *sd,
- const struct i2c_vbi_ram_value *regs,
unsigned int type,u8 flags, int line,
const int fields)
{
struct tvp5150 *decoder = to_tvp5150(sd);
v4l2_std_id std = decoder->norm;
u8 reg;
- int pos = 0;
+ int i, pos = 0;
if (std == V4L2_STD_ALL) {
dev_err(sd->dev, "VBI can't be configured without knowing number of lines\n");
@@ -671,19 +674,19 @@ static int tvp5150_set_vbi(struct v4l2_subdev *sd,
if (line < 6 || line > 27)
return 0;
- while (regs->reg != (u16)-1) {
+ for (i = 0; i < ARRAY_SIZE(vbi_ram_default); i++) {
+ const struct i2c_vbi_ram_value *regs = &vbi_ram_default[i];
+
+ if (!regs->type.vbi_type)
+ continue;
+
if ((type & regs->type.vbi_type) &&
(line >= regs->type.ini_line) &&
(line <= regs->type.end_line))
break;
-
- regs++;
pos++;
}
- if (regs->reg == (u16)-1)
- return 0;
-
type = pos | (flags & 0xf0);
reg = ((line - 6) << 1) + TVP5150_LINE_MODE_INI;
@@ -696,8 +699,7 @@ static int tvp5150_set_vbi(struct v4l2_subdev *sd,
return type;
}
-static int tvp5150_get_vbi(struct v4l2_subdev *sd,
- const struct i2c_vbi_ram_value *regs, int line)
+static int tvp5150_get_vbi(struct v4l2_subdev *sd, int line)
{
struct tvp5150 *decoder = to_tvp5150(sd);
v4l2_std_id std = decoder->norm;
@@ -726,8 +728,8 @@ static int tvp5150_get_vbi(struct v4l2_subdev *sd,
return 0;
}
pos = ret & 0x0f;
- if (pos < 0x0f)
- type |= regs[pos].type.vbi_type;
+ if (pos < ARRAY_SIZE(vbi_ram_default))
+ type |= vbi_ram_default[pos].type.vbi_type;
}
return type;
@@ -788,7 +790,7 @@ static int tvp5150_reset(struct v4l2_subdev *sd, u32 val)
tvp5150_write_inittab(sd, tvp5150_init_default);
/* Initializes VDP registers */
- tvp5150_vdp_init(sd, vbi_ram_default);
+ tvp5150_vdp_init(sd);
/* Selects decoder input */
tvp5150_selmux(sd);
@@ -1121,8 +1123,8 @@ static int tvp5150_s_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_f
for (i = 0; i <= 23; i++) {
svbi->service_lines[1][i] = 0;
svbi->service_lines[0][i] =
- tvp5150_set_vbi(sd, vbi_ram_default,
- svbi->service_lines[0][i], 0xf0, i, 3);
+ tvp5150_set_vbi(sd, svbi->service_lines[0][i],
+ 0xf0, i, 3);
}
/* Enables FIFO */
tvp5150_write(sd, TVP5150_FIFO_OUT_CTRL, 1);
@@ -1148,7 +1150,7 @@ static int tvp5150_g_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_f
for (i = 0; i <= 23; i++) {
svbi->service_lines[0][i] =
- tvp5150_get_vbi(sd, vbi_ram_default, i);
+ tvp5150_get_vbi(sd, i);
mask |= svbi->service_lines[0][i];
}
svbi->service_set = mask;

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