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 EC9CD3C9EF1 for ; Mon, 23 Mar 2026 17:56:21 +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=1774288582; cv=none; b=RJloY1jsHwbNHMUnIRTq7t85UE3LLiCuJh17C4MvX8+u/hZRLv607lOwRu8wh65DFIm2KCPRwL6sCaiUQViPApTQCGNy14Xxf/iEDLyoSA+qmzsN8pBZklVnity0C9W3XXuCeDqkbcsG5YZJLaN6IADZdxLhOjbayOfIj6KrjAI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774288582; c=relaxed/simple; bh=bQ9gS4dZs5k5v646yeU2BSLbqiSWZITsVgQ8bfbSq4Q=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=qPIDcg4BS2S3y2YWVTpuNNqtRejkZmiQqP6+k5Su/enRnXBdBP+lFqK+T9dzfJdlBh5XuLE7X7XLBDXCBOX7RjxmlzwYNioUnV7/pV1i8bnPY5CEYQx0g1xH7fZwy2n9CuuGHARen9jMJq2fnZeBvCr5w3ShAQJPzH1t85buef4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dqr/AgRT; 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="dqr/AgRT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE6E9C4CEF7; Mon, 23 Mar 2026 17:56:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774288581; bh=bQ9gS4dZs5k5v646yeU2BSLbqiSWZITsVgQ8bfbSq4Q=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=dqr/AgRTk5rGZXvGocbcSOySMZd1pKmvaVn8sLTWrDh3myt3anGRX5+0sVSiO1jdY 97ffcZCmv1MVHN21sQuTdgJUvbcZW0zscy3WAc+lr77NxHPazRhtn+LHpoUPiQibbN Rq8KdfwnnPs/ERblaUDc8jwcrc2VQJ81UU0geJQqHINAUAmL7wv70CXgAJvU1xuU1J X/jPAKDdaZTW+gC1ilmaEfuB8bUtx7yCkAKdB8/NG3laVdbWU7CzeKRE5E5iN+L2cc GGRoevQrtWbsUMdjjMg5k3zVFas1nn469edLuKHjHRS+DA0QY+vLJRkE8JmltLSTQc SYAQR6sXwwAUQ== Message-ID: <8d2f44e4-46fd-471f-91a2-5f76b128761f@kernel.org> Date: Mon, 23 Mar 2026 12:56:19 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V1] accel/amdxdna: Return ERR_PTR on dma_alloc_noncoherent failure To: Lizhi Hou , ogabbay@kernel.org, quic_jhugo@quicinc.com, dri-devel@lists.freedesktop.org, maciej.falkowski@linux.intel.com Cc: Wendy Liang , linux-kernel@vger.kernel.org, max.zhen@amd.com, sonal.santan@amd.com References: <20260323173719.2311474-1-lizhi.hou@amd.com> Content-Language: en-US From: "Mario Limonciello (AMD) (kernel.org)" In-Reply-To: <20260323173719.2311474-1-lizhi.hou@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/23/2026 12:37 PM, Lizhi Hou wrote: > From: Wendy Liang > > dma_alloc_noncoherent() returns NULL on failure, but callers of > aie2_alloc_msg_buffer() check for IS_ERR(). Return ERR_PTR(-ENOMEM) > instead of NULL to match the amdxdna_iommu_alloc() path and the > caller's error checking convention. > > Fixes: ece3e8980907 ("accel/amdxdna: Allow forcing IOVA-based DMA via module parameter") > Signed-off-by: Wendy Liang > Signed-off-by: Lizhi Hou > --- > drivers/accel/amdxdna/aie2_message.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > diff --git a/drivers/accel/amdxdna/aie2_message.c b/drivers/accel/amdxdna/aie2_message.c > index 7e219a5eda56..a1c546c3e81c 100644 > --- a/drivers/accel/amdxdna/aie2_message.c > +++ b/drivers/accel/amdxdna/aie2_message.c > @@ -56,6 +56,7 @@ void *aie2_alloc_msg_buffer(struct amdxdna_dev_hdl *ndev, u32 *size, > dma_addr_t *dma_addr) > { > struct amdxdna_dev *xdna = ndev->xdna; > + void *vaddr; > int order; > > *size = max(*size, SZ_8K); > @@ -67,8 +68,12 @@ void *aie2_alloc_msg_buffer(struct amdxdna_dev_hdl *ndev, u32 *size, > if (amdxdna_iova_on(xdna)) > return amdxdna_iommu_alloc(xdna, *size, dma_addr); > > - return dma_alloc_noncoherent(xdna->ddev.dev, *size, dma_addr, > + vaddr = dma_alloc_noncoherent(xdna->ddev.dev, *size, dma_addr, > DMA_FROM_DEVICE, GFP_KERNEL); > + if (!vaddr) > + return ERR_PTR(-ENOMEM); > + > + return vaddr; > } > > void aie2_free_msg_buffer(struct amdxdna_dev_hdl *ndev, size_t size, Reviewed-by: Mario Limonciello (AMD)