Hi Sakari, I verified the patch multiple times but the code cannot work. Regards, Andy -----Original Message----- From: Sakari Ailus [mailto:sakari.ailus@xxxxxxxxxxxxxxx] Sent: Friday, January 19, 2018 5:23 PM To: linux-media@xxxxxxxxxxxxxxx Cc: Yeh, Andy <andy.yeh@xxxxxxxxx> Subject: [PATCH 1/1] imx258: Fix sparse warnings Fix a few sparse warnings related to conversion between CPU and big endian. Also simplify the code in the process. Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> --- Hi Andy, There were a few issues Sparse found in the imx258 driver. Could you test the patch, please? drivers/media/i2c/imx258.c | 21 ++++++++------------- 1 file changed, 8 insertions(+), 13 deletions(-) diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c index a7e58bd23de7..b73c25ae8725 100644 --- a/drivers/media/i2c/imx258.c +++ b/drivers/media/i2c/imx258.c @@ -440,10 +440,10 @@ static int imx258_read_reg(struct imx258 *imx258, u16 reg, u32 len, u32 *val) { struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd); struct i2c_msg msgs[2]; + __be16 reg_addr_be = cpu_to_be16(reg); + __be32 data_be = 0; u8 *data_be_p; int ret; - u32 data_be = 0; - u16 reg_addr_be = cpu_to_be16(reg); if (len > 4) return -EINVAL; @@ -474,22 +474,17 @@ static int imx258_read_reg(struct imx258 *imx258, u16 reg, u32 len, u32 *val) static int imx258_write_reg(struct imx258 *imx258, u16 reg, u32 len, u32 val) { struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd); - int buf_i, val_i; - u8 buf[6], *val_p; + u8 __buf[6], *buf = __buf; + int i; if (len > 4) return -EINVAL; - buf[0] = reg >> 8; - buf[1] = reg & 0xff; + *buf++ = reg >> 8; + *buf++ = reg & 0xff; - val = cpu_to_be32(val); - val_p = (u8 *)&val; - buf_i = 2; - val_i = 4 - len; - - while (val_i < 4) - buf[buf_i++] = val_p[val_i++]; + for (i = len - 1; i >= 0; i++) + *buf++ = (u8)(val >> (i << 3)); if (i2c_master_send(client, buf, len + 2) != len + 2) return -EIO; -- 2.11.0
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sakari_new.diff
Description: sakari_new.diff
