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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20191002133356.GP22609@kadam> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191002_064035_571907_F0AD8EE8 X-CRM114-Status: GOOD ( 14.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexandre Torgue , netdev@vger.kernel.org, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, Jose Abreu , Maxime Coquelin , Giuseppe Cavallaro , "David S . Miller" , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 02/10/2019 14:33, Dan Carpenter wrote: > On Wed, Oct 02, 2019 at 12:08:49PM +0100, Colin King wrote: >> From: Colin Ian King >> >> The expression !(hw_cap & XGMAC_HWFEAT_RAVSEL) >> 10 is always zero, so >> the masking operation is incorrect. Fix this by adding the missing >> parentheses to correctly bind the negate operator on the entire expression. >> >> Addresses-Coverity: ("Operands don't affect result") >> Fixes: c2b69474d63b ("net: stmmac: xgmac: Correct RAVSEL field interpretation") >> Signed-off-by: Colin Ian King >> --- >> drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c >> index 965cbe3e6f51..2e814aa64a5c 100644 >> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c >> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c >> @@ -369,7 +369,7 @@ static void dwxgmac2_get_hw_feature(void __iomem *ioaddr, >> dma_cap->eee = (hw_cap & XGMAC_HWFEAT_EEESEL) >> 13; >> dma_cap->atime_stamp = (hw_cap & XGMAC_HWFEAT_TSSEL) >> 12; >> dma_cap->av = (hw_cap & XGMAC_HWFEAT_AVSEL) >> 11; >> - dma_cap->av &= !(hw_cap & XGMAC_HWFEAT_RAVSEL) >> 10; >> + dma_cap->av &= !((hw_cap & XGMAC_HWFEAT_RAVSEL) >> 10); > > There is no point to the shift at all. I must admit I was so focused on figuring out the original intent of the code I totally missed that optimization step. I'll send a V2. > > regards, > dan carpenter > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel