From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f49.google.com (mail-wr1-f49.google.com [209.85.221.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 17A4830E82D for ; Mon, 1 Sep 2025 10:27:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756722428; cv=none; b=lzRF0lqkbVdsg5Ps4FYgSQFV89bRFg4bKTr11L+pNZ9/lNCYB1a3hcBHN+fb/F2eSWWOx7cUhcIVzaI3amAVerDcivJ0/Bec4ZRvjAHZ5c4v0WKohvWhcIh0bAHO/5H8PKAd0AQfkm84yKAuhydGf03yXDv6APTTXTABhMveS0k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756722428; c=relaxed/simple; bh=6h/YI/Py/XlG4xBbZJ7thzV4uG9Z0BsZDM3FqQjDBdE=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=gi8eTChuoxYX/0sMDX4UYKc33s3k+Zyh9USa/C43FUpPztVXEttelII+ykKapdKJ/pAAKY9NUd8VDT18uVcocJ7OrAGetfZ+SoPF2K47zpmb2kPtrK7oTmHbZb8dvefJS2IdZRA+rl85J+0egyhNSxO+5D0hVScSuf5qS/Od4Gc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=y2CXlHCp; arc=none smtp.client-ip=209.85.221.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="y2CXlHCp" Received: by mail-wr1-f49.google.com with SMTP id ffacd0b85a97d-3d4dcf3863dso759135f8f.1 for ; Mon, 01 Sep 2025 03:27:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1756722425; x=1757327225; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:message-id:subject:cc :to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=U3wMAXUg6TcQMtXg5Lgxugiws7d3wfWBJLDrvyAva+k=; b=y2CXlHCpkTmxqjhja4moihSjlo/kiMrxjrx/pE0Dzwsj6FFmywwrJt+Sg3cVBNbzWs XfJawbLzXNwadZJbYP07CvrzT8Sk1QhMr6CZlZhNB7IZ32wlTWvsz4eIiDBWNjvRUDCc Vdprl29gC9JFnJWjruuNGZjZzPHWlBjQxxxU2Rqw9D/5QJGORo+vTbs/B433aCKHzxl+ r9NlZ3eIp1xhf3dlw9KiJ+WXlgW6ftPO+oyR85tY0kIszj11MuDHgi9a28L5tA71qMW8 3f59sLUhxUbNtn/s5CXGk8cKbDocNWZnnB0rCLLJmD15pDDkJnTr79gfTnjAdCXQ5q9f aPLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756722425; x=1757327225; h=in-reply-to:content-disposition:mime-version:message-id:subject:cc :to:from:date:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=U3wMAXUg6TcQMtXg5Lgxugiws7d3wfWBJLDrvyAva+k=; b=VWABRrmWaR2ERI5uE+t/kd9T8hvXySTGO6+3qSD5foPahiAuELsegIS+7v4qnrjSoS KVAx91nAIYRu0st8Yf6AwjyWw+1j3ngRVUTvOei8QCSZ64fJz2tGdn9rEDxwh8HbwnEi hYcqwdAgz/VnJ/86fAqPzpWKNRAfjnYDtMQ5XIRPF0GSOJ0MOUthj0SDSNIoakbRBtb3 B0L7QczYMVarBaa3DDScD74RkhAHOc1srz2UT4PBs1HSpmv8HsUxMfFnqjQ3qHQ5siOy nVHjigU0KPJIH59kclH6JhsU7bIKImkSzzBtJKMSIF0wTdLACUd17rVVbzl2ptuxVRKX aFTA== X-Forwarded-Encrypted: i=1; AJvYcCVBjRndLDSaPJi8+0jeQx6AWerJJXn7O/AoHzQgYP48nm8hu8AaP42fNBy+DqMWhOWNwXWBguHnf0iP@vger.kernel.org X-Gm-Message-State: AOJu0Yyqnf7AOPuyosIzMFo2dqYJbyajG7MYA6KuY084Wi23Qc9xCNyE jD7cVKnXHIP+yeLXRHv7pRhGNgrtsrzg0KnhLh5tBgiEgfhckhB66hgfh7h83Ff1VJI= X-Gm-Gg: ASbGncsjzJqKgj8BPAThPR832+j3Bo/Qe3EfCFfk0bhRw6gbUH2glCXxJzgqP3dLbEF sy01JIBkfAub0ga+hEvWHJJbRNAm7kyykfLmLJ5trmW8tGoqgktVrVLiqZjHrGFX9voeYPZPP3F m82WJY1/kHwm8vUdQc4XQGZZhyFnCAKVUTDU11Ayp1/DY+0bcXHqXK/kI+Fdt2Es7CKeZOLlFck JahOsGX3p0ztLM8M6HfsafQA5qN1A7/D50c+0rZV6IDw+1HkVpDGkYLQs4qjRXgF2OHo3lM7kpS JwQSzylKl88juKcFGkLj0hQaYQGagVdcp1y0ezz5G/T/JW/M/4BrPyrGDFSejLcO5opNAy8Oph5 xhkob8nCXoSUfBpiRJ61MuuXnEJaxy4gazdq0+A== X-Google-Smtp-Source: AGHT+IE2RqWOouUNKF0LuMwYDv8VNEg+V4AVmzf6zsck7npghoz21h/jWKBn3nN0q+raGVTCFFwHxQ== X-Received: by 2002:a05:6000:2510:b0:3d7:7def:8435 with SMTP id ffacd0b85a97d-3d77def8d9dmr1055874f8f.18.1756722425227; Mon, 01 Sep 2025 03:27:05 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-3cf34493b8csm14441165f8f.59.2025.09.01.03.27.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Sep 2025 03:27:04 -0700 (PDT) Date: Mon, 1 Sep 2025 13:27:01 +0300 From: Dan Carpenter To: oe-kbuild@lists.linux.dev, Jisheng Zhang , Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Robin Murphy Cc: lkp@intel.com, oe-kbuild-all@lists.linux.dev, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 10/14] dmaengine: dma350: Alloc command[] from dma pool Message-ID: <202508291556.kjNumYgR-lkp@intel.com> Precedence: bulk X-Mailing-List: devicetree@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: <20250823154009.25992-11-jszhang@kernel.org> Hi Jisheng, kernel test robot noticed the following build warnings: https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Jisheng-Zhang/dmaengine-dma350-Fix-CH_CTRL_USESRCTRIGIN-definition/20250824-000425 base: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next patch link: https://lore.kernel.org/r/20250823154009.25992-11-jszhang%40kernel.org patch subject: [PATCH 10/14] dmaengine: dma350: Alloc command[] from dma pool config: arm-randconfig-r073-20250829 (https://download.01.org/0day-ci/archive/20250829/202508291556.kjNumYgR-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 13.4.0 If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202508291556.kjNumYgR-lkp@intel.com/ smatch warnings: drivers/dma/arm-dma350.c:387 d350_get_residue() error: uninitialized symbol 'sgcur'. vim +/sgcur +387 drivers/dma/arm-dma350.c 5d099706449d54 Robin Murphy 2025-03-12 360 static u32 d350_get_residue(struct d350_chan *dch) 5d099706449d54 Robin Murphy 2025-03-12 361 { eae79fde2ff50c Jisheng Zhang 2025-08-23 362 u32 res, xsize, xsizehi, linkaddr, linkaddrhi, hi_new; eae79fde2ff50c Jisheng Zhang 2025-08-23 363 int i, sgcur, retries = 3; /* 1st time unlucky, 2nd improbable, 3rd just broken */ eae79fde2ff50c Jisheng Zhang 2025-08-23 364 struct d350_desc *desc = dch->desc; 5d099706449d54 Robin Murphy 2025-03-12 365 5d099706449d54 Robin Murphy 2025-03-12 366 hi_new = readl_relaxed(dch->base + CH_XSIZEHI); 5d099706449d54 Robin Murphy 2025-03-12 367 do { 5d099706449d54 Robin Murphy 2025-03-12 368 xsizehi = hi_new; 5d099706449d54 Robin Murphy 2025-03-12 369 xsize = readl_relaxed(dch->base + CH_XSIZE); 5d099706449d54 Robin Murphy 2025-03-12 370 hi_new = readl_relaxed(dch->base + CH_XSIZEHI); 5d099706449d54 Robin Murphy 2025-03-12 371 } while (xsizehi != hi_new && --retries); 5d099706449d54 Robin Murphy 2025-03-12 372 eae79fde2ff50c Jisheng Zhang 2025-08-23 373 hi_new = readl_relaxed(dch->base + CH_LINKADDRHI); eae79fde2ff50c Jisheng Zhang 2025-08-23 374 do { eae79fde2ff50c Jisheng Zhang 2025-08-23 375 linkaddrhi = hi_new; eae79fde2ff50c Jisheng Zhang 2025-08-23 376 linkaddr = readl_relaxed(dch->base + CH_LINKADDR); eae79fde2ff50c Jisheng Zhang 2025-08-23 377 hi_new = readl_relaxed(dch->base + CH_LINKADDRHI); eae79fde2ff50c Jisheng Zhang 2025-08-23 378 } while (linkaddrhi != hi_new && --retries); eae79fde2ff50c Jisheng Zhang 2025-08-23 379 eae79fde2ff50c Jisheng Zhang 2025-08-23 380 for (i = 0; i < desc->sglen; i++) { eae79fde2ff50c Jisheng Zhang 2025-08-23 381 if (desc->sg[i].phys == (((u64)linkaddrhi << 32) | (linkaddr & ~CH_LINKADDR_EN))) eae79fde2ff50c Jisheng Zhang 2025-08-23 382 sgcur = i; I'm suprised there isn't a break statement after this assignment. What if we exit the loop with i == desc->sglen? eae79fde2ff50c Jisheng Zhang 2025-08-23 383 } eae79fde2ff50c Jisheng Zhang 2025-08-23 384 5d099706449d54 Robin Murphy 2025-03-12 385 res = FIELD_GET(CH_XY_DES, xsize); 5d099706449d54 Robin Murphy 2025-03-12 386 res |= FIELD_GET(CH_XY_DES, xsizehi) << 16; eae79fde2ff50c Jisheng Zhang 2025-08-23 @387 res <<= desc->sg[sgcur].tsz; ^^^^^ Uninitialized. eae79fde2ff50c Jisheng Zhang 2025-08-23 388 eae79fde2ff50c Jisheng Zhang 2025-08-23 389 for (i = sgcur + 1; i < desc->sglen; i++) eae79fde2ff50c Jisheng Zhang 2025-08-23 390 res += (((u32)desc->sg[i].xsizehi << 16 | desc->sg[i].xsize) << desc->sg[i].tsz); 5d099706449d54 Robin Murphy 2025-03-12 391 eae79fde2ff50c Jisheng Zhang 2025-08-23 392 return res; 5d099706449d54 Robin Murphy 2025-03-12 393 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki