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Tue, 07 Oct 2025 09:40:37 -0700 (PDT) Date: Tue, 7 Oct 2025 19:40:33 +0300 From: Dan Carpenter To: Rakuram Eswaran Cc: ulf.hansson@linaro.org, zhoubinbin@loongson.cn, u.kleine-koenig@baylibre.com, chenhuacai@kernel.org, david.hunter.linux@gmail.com, skhan@linuxfoundation.org, khalid@kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linux.dev, kernel test robot Subject: Re: [PATCH] mmc: pxamci: Fix passing NULL to PTR_ERR() in pxamci_probe() Message-ID: References: <20251007161948.12442-1-rakuram.e96@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251007161948.12442-1-rakuram.e96@gmail.com> On Tue, Oct 07, 2025 at 09:47:44PM +0530, Rakuram Eswaran wrote: > Smatch reported: > drivers/mmc/host/pxamci.c:709 pxamci_probe() warn: passing zero to 'PTR_ERR' > > Case 1: > When dma_request_chan() fails, host->dma_chan_rx is an ERR_PTR(), > but it is reset to NULL before using PTR_ERR(), resulting in PTR_ERR(0). > This mistakenly returns 0 instead of the real error code. > > Case 2: > When devm_clk_get() fails, host->clk is an ERR_PTR() resulting in the similar > issue like case 1. > > Store the error code before nullifying the pointers in both the cases. > > Reported-by: kernel test robot > Reported-by: Dan Carpenter > Closes: https://lore.kernel.org/r/202510041841.pRlunIfl-lkp@intel.com/ > Fixes: 58c40f3faf742c ("mmc: pxamci: Use devm_mmc_alloc_host() helper") > Signed-off-by: Rakuram Eswaran > --- Thanks! Reviewed-by: Dan Carpenter regards, dan carpenter