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Thu, 06 Jan 2022 04:16:09 -0800 (PST) Date: Thu, 6 Jan 2022 12:16:05 +0000 From: Miaoqian Lin To: Chun-Kuang Hu Cc: Philipp Zabel , Chunfeng Yun , Kishon Vijay Abraham I , Vinod Koul , Matthias Brugger , DRI Development , "moderated list:ARM/Mediatek SoC support" , Linux ARM , linux-phy@lists.infradead.org, linux-kernel Subject: Re: [PATCH] phy: mediatek: Fix missing check in mtk_mipi_tx_probe Message-ID: <20220106121524.GA25165@8345e2a12d0c> References: <20211224082103.7658-1-linmq006@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220106_041611_973822_CC11BDB5 X-CRM114-Status: GOOD ( 16.60 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Hi, Chun-Kuang: On Fri, Dec 31, 2021 at 12:31:33AM +0800, Chun-Kuang Hu wrote: > > diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c > > index 28ad9403c441..67b005d5b9e3 100644 > > --- a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c > > +++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c > > @@ -146,6 +146,8 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev) > > return -ENOMEM; > > > > mipi_tx->driver_data = of_device_get_match_data(dev); > > + if (!mipi_tx->driver_data) > > I'm confused. mtk_mipi_tx_probe() is called because this device node's > compatible match one in mtk_mipi_tx_match[]. So I think the return > value of of_device_get_match_data(dev) would not be NULL. If this is > true, this checking is redundant. > I think your are right, this checking is redundant. Thanks for your reply. Regards, Miaoqian. -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy