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[media] hd29l2: fix sparse error and warnings 

drivers/media/dvb-frontends/hd29l2.c:29:18: warning: Variable length array is used.
drivers/media/dvb-frontends/hd29l2.c:34:32: error: cannot size expression
drivers/media/dvb-frontends/hd29l2.c:125:5: warning: symbol 'hd29l2_rd_reg_mask' was not declared. Should it be static?

Variable length arrays are frowned upon, so replace with a fixed length and check
that there won't be a buffer overrun.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2014-12-13 08:52:56 -03:00 committed by Mauro Carvalho Chehab
parent 7c424dd14f
commit 50fd5e8c1e
1 changed files with 7 additions and 3 deletions
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10
drivers/media/dvb-frontends/hd29l2.c
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@ -22,20 +22,24 @@
#include "hd29l2_priv.h"
#define HD29L2_MAX_LEN (3)
/* write multiple registers */
static int hd29l2_wr_regs(struct hd29l2_priv *priv, u8 reg, u8 *val, int len)
{
int ret;
u8 buf[2 + len];
u8 buf[2 + HD29L2_MAX_LEN];
struct i2c_msg msg[1] = {
{
.addr = priv->cfg.i2c_addr,
.flags = 0,
.len = sizeof(buf),
.len = 2 + len,
.buf = buf,
}
};
if (len > HD29L2_MAX_LEN)
return -EINVAL;
buf[0] = 0x00;
buf[1] = reg;
memcpy(&buf[2], val, len);
@ -118,7 +122,7 @@ static int hd29l2_wr_reg_mask(struct hd29l2_priv *priv, u8 reg, u8 val, u8 mask)
}
/* read single register with mask */
int hd29l2_rd_reg_mask(struct hd29l2_priv *priv, u8 reg, u8 *val, u8 mask)
static int hd29l2_rd_reg_mask(struct hd29l2_priv *priv, u8 reg, u8 *val, u8 mask)
{
int ret, i;
u8 tmp;