From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E20DD2E9746; Sat, 23 Aug 2025 15:57:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755964661; cv=none; b=JKbOsi5UhbVEl9Lp+JOTtb4XaMFiSxFCnEyw9tSeEl8vrXFH5hTCh92lUcyXBvUGK/JiBmpEdYXzkLUQhNODlZZfduV/zaD0HRY1BEI0MLdpzSQ+ORE9Bb9VjsDZI11ik2mTg20YZPj7NQOu5xq5Lrki4Z1tmAUlxBKnll5I38M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755964661; c=relaxed/simple; bh=mPhmqWPTnMNFn5FnYjezuTC9hDdu0Dic6CcLiRxG/2E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OTVL87oUKrrdi86h3fz/MqObqqPxSqnta8Lsec0v5jXXdmaWr4m40f+6vNSoqjLOO+oshNcT/y3aFe2bbf1VwCHO8TUl5peBpt5H5ITwLE/bYiSVQhIEJilaDEdSrFC0oBFbb1QXlYLwVwJwk/TXjLItRPwep8u3rwpZY/padHs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uM67uI7C; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="uM67uI7C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ED3F4C4CEE7; Sat, 23 Aug 2025 15:57:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755964660; bh=mPhmqWPTnMNFn5FnYjezuTC9hDdu0Dic6CcLiRxG/2E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uM67uI7CWhJwXbQZuvDsd7Pqr81tTyu7iVzUKwEZICsl8wP4HK5TmAVnm7uV0CroP iAMEVvK7AyoGJn6vCCtyhjoVyXTm9nfRTP8hdR1zYhLKXSgXGSrSpPMQ6s1nUiCgFo P6KHQx3/oaqFCaSjTnBq/MFZUG+MF+fWQcKZ9uNbuyLfQbOt9Oo457b0JN2peKe/IB 3vZAivVjQDRsQR3Kjc+YGcarG316pP99Q9lP7nI5gdtuik1o+yqCi6Z+NPbyuO/qJD RX325lh7j7TfSkj0WLrBA//SZW9T0n0bDr2ZfoW69D9Q1GgIx0IodlvDAUt4XS4JE6 5P7uV1E10pQIg== From: Jisheng Zhang To: Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Robin Murphy Cc: dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 03/14] dmaengine: dma350: Check vchan_next_desc() return value Date: Sat, 23 Aug 2025 23:39:58 +0800 Message-ID: <20250823154009.25992-4-jszhang@kernel.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250823154009.25992-1-jszhang@kernel.org> References: <20250823154009.25992-1-jszhang@kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit vchan_next_desc() may return NULL, check its return value. Signed-off-by: Jisheng Zhang --- drivers/dma/arm-dma350.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/dma/arm-dma350.c b/drivers/dma/arm-dma350.c index 24cbadc5f076..96350d15ed85 100644 --- a/drivers/dma/arm-dma350.c +++ b/drivers/dma/arm-dma350.c @@ -399,11 +399,14 @@ static enum dma_status d350_tx_status(struct dma_chan *chan, dma_cookie_t cookie static void d350_start_next(struct d350_chan *dch) { u32 hdr, *reg; + struct virt_dma_desc *vd; - dch->desc = to_d350_desc(vchan_next_desc(&dch->vc)); - if (!dch->desc) + vd = vchan_next_desc(&dch->vc); + if (!vd) return; + dch->desc = to_d350_desc(vd); + list_del(&dch->desc->vd.node); dch->status = DMA_IN_PROGRESS; dch->cookie = dch->desc->vd.tx.cookie; -- 2.50.0