lkml.org 
[lkml]   [2019]   [Aug]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] staging:kpc2000:Fix dubious x | !y sparse warning
On Thu, Aug 01, 2019 at 12:06:06AM +0530, Harsh Jain wrote:
> Bitwise OR(|) operation with 0 always yield same result.
> It fixes dubious x | !y sparse warning.
>
> Signed-off-by: Harsh Jain <harshjain32@gmail.com>
> ---
> drivers/staging/kpc2000/kpc2000_i2c.c | 16 +---------------
> 1 file changed, 1 insertion(+), 15 deletions(-)
>
> diff --git a/drivers/staging/kpc2000/kpc2000_i2c.c b/drivers/staging/kpc2000/kpc2000_i2c.c
> index b108da4..5f027d7c 100644
> --- a/drivers/staging/kpc2000/kpc2000_i2c.c
> +++ b/drivers/staging/kpc2000/kpc2000_i2c.c
> @@ -536,29 +536,15 @@ static u32 i801_func(struct i2c_adapter *adapter)
>
> u32 f =
> I2C_FUNC_I2C | /* 0x00000001 (I enabled this one) */
> - !I2C_FUNC_10BIT_ADDR | /* 0x00000002 */
> - !I2C_FUNC_PROTOCOL_MANGLING | /* 0x00000004 */
> ((priv->features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0) | /* 0x00000008 */
> - !I2C_FUNC_SMBUS_BLOCK_PROC_CALL | /* 0x00008000 */
> I2C_FUNC_SMBUS_QUICK | /* 0x00010000 */
> - !I2C_FUNC_SMBUS_READ_BYTE | /* 0x00020000 */
> - !I2C_FUNC_SMBUS_WRITE_BYTE | /* 0x00040000 */
> - !I2C_FUNC_SMBUS_READ_BYTE_DATA | /* 0x00080000 */
> - !I2C_FUNC_SMBUS_WRITE_BYTE_DATA | /* 0x00100000 */
> - !I2C_FUNC_SMBUS_READ_WORD_DATA | /* 0x00200000 */
> - !I2C_FUNC_SMBUS_WRITE_WORD_DATA | /* 0x00400000 */
> - !I2C_FUNC_SMBUS_PROC_CALL | /* 0x00800000 */
> - !I2C_FUNC_SMBUS_READ_BLOCK_DATA | /* 0x01000000 */
> - !I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | /* 0x02000000 */

This is ok, it is showing you that these bits are explicitly being not
set. Which is good, now you can go through the list and see that all
are accounted for.

So I think this should stay as-is, thanks.

greg k-h

\
 
 \ /
  Last update: 2019-08-01 18:35    [W:0.057 / U:0.136 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site