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| author |   Antti Palosaari <crope@iki.fi> | 2013-11-07 17:01:31 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <m.chehab@samsung.com> | 2013-12-19 09:20:17 -0200 |
| commit | 050ae82c35fd8bb72b27becb1b9d19c7f5978234 (patch) | |
| tree | cc5566bebb7e48bf84f3d5b4d331536f4b44e5b7 /drivers/media/tuners/m88ts2022.c | |
| parent | [media] MAINTAINERS: add M88TS2022 (diff) | |
| download | linux-dev-050ae82c35fd8bb72b27becb1b9d19c7f5978234.tar.xz linux-dev-050ae82c35fd8bb72b27becb1b9d19c7f5978234.zip | |
[media] m88ts2022: do not use dynamic stack allocation
I2C transfer were using dynamic stack allocation. Get rid of it.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/tuners/m88ts2022.c')
| -rw-r--r-- | drivers/media/tuners/m88ts2022.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/media/tuners/m88ts2022.c b/drivers/media/tuners/m88ts2022.c index 0625e36d0a92..4b3eec28fb76 100644 --- a/drivers/media/tuners/m88ts2022.c +++ b/drivers/media/tuners/m88ts2022.c @@ -26,17 +26,22 @@ static int m88ts2022_wr_regs(struct m88ts2022_priv *priv, u8 reg, const u8 *val, int len) { +#define MAX_WR_LEN 3 +#define MAX_WR_XFER_LEN (MAX_WR_LEN + 1) int ret; - u8 buf[1 + len]; + u8 buf[MAX_WR_XFER_LEN]; struct i2c_msg msg[1] = { { .addr = priv->cfg->i2c_addr, .flags = 0, - .len = sizeof(buf), + .len = 1 + len, .buf = buf, } }; + if (WARN_ON(len > MAX_WR_LEN)) + return -EINVAL; + buf[0] = reg; memcpy(&buf[1], val, len); @@ -57,8 +62,10 @@ static int m88ts2022_wr_regs(struct m88ts2022_priv *priv, static int m88ts2022_rd_regs(struct m88ts2022_priv *priv, u8 reg, u8 *val, int len) { +#define MAX_RD_LEN 1 +#define MAX_RD_XFER_LEN (MAX_RD_LEN) int ret; - u8 buf[len]; + u8 buf[MAX_RD_XFER_LEN]; struct i2c_msg msg[2] = { { .addr = priv->cfg->i2c_addr, @@ -68,11 +75,14 @@ static int m88ts2022_rd_regs(struct m88ts2022_priv *priv, u8 reg, }, { .addr = priv->cfg->i2c_addr, .flags = I2C_M_RD, - .len = sizeof(buf), + .len = len, .buf = buf, } }; + if (WARN_ON(len > MAX_RD_LEN)) + return -EINVAL; + ret = i2c_transfer(priv->i2c, msg, 2); if (ret == 2) { memcpy(val, buf, len); |