diff mbox

drivers/i2c/i2c-core.c: Fix sparse warning

Message ID 20150403025338.GA18595@Caladan
State Changes Requested
Headers show

Commit Message

Nickolaus Woodruff April 3, 2015, 2:53 a.m. UTC
This patch fixes the following sparse warning in drivers/i2c/:

CHECK   drivers/i2c/i2c-core.c
drivers/i2c/i2c-core.c:2353:36: warning: dubious: x | !y

Signed-off-by: Nickolaus Woodruff <nickolauswoodruff@gmail.com>
---
 drivers/i2c/i2c-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--
1.9.1

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Comments

Wolfram Sang April 3, 2015, 6:28 p.m. UTC | #1
> -	u8 addr = (msg->addr << 1) | !!(msg->flags & I2C_M_RD);
> +	u8 addr = (msg->addr << 1) | ((msg->flags & I2C_M_RD) != 0);

I prefer !! as an idiom for "bit to bool".

Thanks,

   Wolfram
diff mbox

Patch

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index edf274c..f50d46e 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -2350,7 +2350,7 @@  static u8 i2c_smbus_pec(u8 crc, u8 *p, size_t count)
 static u8 i2c_smbus_msg_pec(u8 pec, struct i2c_msg *msg)
 {
 	/* The address will be sent first */
-	u8 addr = (msg->addr << 1) | !!(msg->flags & I2C_M_RD);
+	u8 addr = (msg->addr << 1) | ((msg->flags & I2C_M_RD) != 0);
 	pec = i2c_smbus_pec(pec, &addr, 1);

 	/* The data buffer follows */