[1/2] usb: typec: tipd: Don't read/write more bytes than required

Commit Message

Sven Peter Sept. 14, 2021, 10:42 a.m. UTC

tps6598x_block_read/write always read 65 bytes of data even when much
less is required when I2C_FUNC_I2C is used. Reduce this to the correct
number.

Signed-off-by: Sven Peter <[e-mail]>
---
 drivers/usb/typec/tipd/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index 21b3ae25c76d..c18ec3785592 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -123,7 +123,7 @@  tps6598x_block_read(struct tps6598x *tps, u8 reg, void *val, size_t len)
 	if (!tps->i2c_protocol)
 		return regmap_raw_read(tps->regmap, reg, val, len);
 
-	ret = regmap_raw_read(tps->regmap, reg, data, sizeof(data));
+	ret = regmap_raw_read(tps->regmap, reg, data, len + 1);
 	if (ret)
 		return ret;
 
@@ -145,7 +145,7 @@  static int tps6598x_block_write(struct tps6598x *tps, u8 reg,
 	data[0] = len;
 	memcpy(&data[1], val, len);
 
-	return regmap_raw_write(tps->regmap, reg, data, sizeof(data));
+	return regmap_raw_write(tps->regmap, reg, data, len + 1);
 }
 
 static inline int tps6598x_read16(struct tps6598x *tps, u8 reg, u16 *val)