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([2405:201:1e:f1d5:3667:ab4b:122d:211b]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20c138cbbcdsm10241625ad.82.2024.10.05.02.34.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Oct 2024 02:34:44 -0700 (PDT) From: Advait Dhamorikar To: Vinod Koul Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org, anupnewsmail@gmail.com, Advait Dhamorikar Subject: [PATCH] drivers/dma: Fix unsigned compared against 0 Date: Sat, 5 Oct 2024 15:04:36 +0530 Message-Id: <20241005093436.27728-1-advaitdhamorikar@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" An unsigned value can never be negative, so this test will always evaluate the same way. In ep93xx_dma_alloc_chan_resources: An unsigned dma_cfg.port's value is checked against EP93XX_DMA_I2S1 which is 0. Signed-off-by: Advait Dhamorikar --- drivers/dma/ep93xx_dma.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c index 995427afe077..6d7f6bd12d76 100644 --- a/drivers/dma/ep93xx_dma.c +++ b/drivers/dma/ep93xx_dma.c @@ -929,8 +929,7 @@ static int ep93xx_dma_alloc_chan_resources(struct dma_c= han *chan) =20 /* Sanity check the channel parameters */ if (!edmac->edma->m2m) { - if (edmac->dma_cfg.port < EP93XX_DMA_I2S1 || - edmac->dma_cfg.port > EP93XX_DMA_IRDA) + if (edmac->dma_cfg.port > EP93XX_DMA_IRDA) return -EINVAL; if (edmac->dma_cfg.dir !=3D ep93xx_dma_chan_direction(chan)) return -EINVAL; --=20 2.34.1