linux-kernel - Re: [PATCH] soc: xilinx: xlnx_vcu: Use bitwise & rather than logical && on clkoutdiv

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Date:   Tue, 16 Jan 2018 15:50:04 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     Dhaval Rajeshbhai Shah <dhaval.shah@...inx.com>,
        "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Michal Simek <michal.simek@...inx.com>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] soc: xilinx: xlnx_vcu: Use bitwise & rather than logical
 && on clkoutdiv

On 16.1.2018 15:22, Dhaval Rajeshbhai Shah wrote:
> Hi,
> 
>> -----Original Message-----
>> From: Gustavo A. R. Silva [mailto:garsilva@...eddedor.com]
>> Sent: Monday, January 15, 2018 11:15 AM
>> To: Michal Simek <michal.simek@...inx.com>; Dhaval Rajeshbhai Shah
>> <DSHAH@...inx.com>
>> Cc: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
>> Gustavo A. R. Silva <garsilva@...eddedor.com>
>> Subject: [PATCH] soc: xilinx: xlnx_vcu: Use bitwise & rather than logical && on
>> clkoutdiv
>>
>> Currently clkoutdiv is being operated on by a logical && operator rather than a
>> bitwise & operator. This looks incorrect as these should be bit flag operations.
>>
>> Addresses-Coverity-ID: 1463959 ("Logical vs. bitwise operator")
>> Fixes: cee8113a295a ("soc: xilinx: xlnx_vcu: Add Xilinx ZYNQMP VCU logicoreIP
>> init driver")
>> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
>> ---
>>  drivers/soc/xilinx/xlnx_vcu.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/soc/xilinx/xlnx_vcu.c b/drivers/soc/xilinx/xlnx_vcu.c index
>> c1d6f1b..a840c02 100644
>> --- a/drivers/soc/xilinx/xlnx_vcu.c
>> +++ b/drivers/soc/xilinx/xlnx_vcu.c
>> @@ -334,7 +334,7 @@ static int xvcu_set_vcu_pll_info(struct xvcu_device
>> *xvcu)
>>   */
>>  vcu_pll_ctrl = xvcu_read(xvcu->vcu_slcr_ba, VCU_PLL_CTRL);
>>  clkoutdiv = vcu_pll_ctrl >> VCU_PLL_CTRL_CLKOUTDIV_SHIFT;
>> -clkoutdiv = clkoutdiv && VCU_PLL_CTRL_CLKOUTDIV_MASK;
>> +clkoutdiv = clkoutdiv & VCU_PLL_CTRL_CLKOUTDIV_MASK;
>>  if (clkoutdiv != 1) {
>>  dev_err(xvcu->dev, "clkoutdiv value is invalid\n");
>>  return -EINVAL;
>> --
>> 2.7.4
> 
> Acked-by: Dhaval Shah <dshah@...inx.com>

Applied.

Thanks,
Michal