[PATCH] i2c: at91: add a sanity check on i2c message length
From: ludovic.desroches at atmel.com <hidden>
Date: 2012-10-10 14:25:58
Also in:
linux-i2c
Subsystem:
i2c subsystem, i2c subsystem host drivers, the rest · Maintainers:
Andi Shyti, Linus Torvalds
From: Ludovic Desroches <redacted> If the i2c message length is zero, i2c-at91 will directly return an error instead of trying to send a zero-length message. Signed-off-by: Ludovic Desroches <redacted> --- fix for 3.7 drivers/i2c/busses/i2c-at91.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index aa59a25..eaddc77 100644
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c@@ -263,6 +263,9 @@ static int at91_twi_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num) unsigned int_addr_flag = 0; struct i2c_msg *m_start = msg; + if (!msg->len) + return -EINVAL; + dev_dbg(&adap->dev, "at91_xfer: processing %d messages:\n", num); /*
--
1.7.11.3