From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (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 CD1AE340281 for ; Mon, 23 Mar 2026 17:53:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774288438; cv=none; b=hBVIcLNMT1QTHOKLWbJ2oj/36/i1/w9Jd5iGEYTGzhU8iL+JaDBWlCLD2ge/XYuvU5SI9h4kvJhUevsSWW1GX3bPgxwV35tMCIUfer2N5SmOzOrLrjzySqXs6OJTFEJvpu7qavUOA/qPgAnOYy7mUQXBA/ndCmzut4Sv9eWJyQk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774288438; c=relaxed/simple; bh=u5t1TFwBx8WnyaM63nFRG9/Qj/4xkp15sbmGC+zLfl0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=JueTtAV3DfFyKba+QviSn3/gVYFhuFZu2YLrQTKrN5wLoNCJssk6v7lO8I66aPHdk53DRJEhwi+q+tlTXy26WrQZ26Gufa7zChO8+vooP+UF6MafLJXtLhQ2TuZlRy1Yfws1o9/ICwR1BwB0qnuImJBhAPs4H18OQrB8AYyIrJo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=nTRqbWbv; arc=none smtp.client-ip=192.198.163.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="nTRqbWbv" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774288437; x=1805824437; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=u5t1TFwBx8WnyaM63nFRG9/Qj/4xkp15sbmGC+zLfl0=; b=nTRqbWbvRopz0ERr0R/cRAgH5+pDMLV7XMUpEKjnAa+JI7gAOg4h+vLK WMv6zura+X4hOY3feBscGFn3BnEZTzQBZnxHearwDe05qvhIakVsHkpU5 LrxYgFKPK7+CEoS9aWsvirltV5Bj5eHuYGTbKI4KvLNAknwD5+zHjlKx1 gqcPRbDbUPCFX1MUG6Z9wlsWkA7zgGJePzFu+ZF8t43vRuHfZxqJM5L2k dhIow4D4aynHJ293pkHTKiv0XMXw1/sAoq0m9k2hB+cyTlrcf/uiEC2Qx m1BVca1Tk0bCFl85TIQ82/IB5dG+HU6wKgwKtrFouU6IBSkfIJ7Ss71Jb g==; X-CSE-ConnectionGUID: z5GwejzQQ7aAzBV4gM/aNQ== X-CSE-MsgGUID: snuInI4ITsmthrG9dZS7ZA== X-IronPort-AV: E=McAfee;i="6800,10657,11738"; a="79204113" X-IronPort-AV: E=Sophos;i="6.23,137,1770624000"; d="scan'208";a="79204113" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Mar 2026 10:53:56 -0700 X-CSE-ConnectionGUID: p6IxU8e8S+ewbuZwH3iokA== X-CSE-MsgGUID: y148Gp61TrGXnNBOvHotKA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,137,1770624000"; d="scan'208";a="219243849" Received: from kwachows-mobl.ger.corp.intel.com (HELO [10.94.253.106]) ([10.94.253.106]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Mar 2026 10:53:54 -0700 Message-ID: <8735bc51-0774-49fd-bfe3-2c220f9f2f75@linux.intel.com> Date: Mon, 23 Mar 2026 18:53:51 +0100 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, mario.limonciello@amd.com, 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: Karol Wachowski Organization: Intel Technology Poland sp. z o.o. - ul. Slowackiego 173, 80-298 Gdansk - KRS 101882 - NIP 957-07-52-316 In-Reply-To: <20260323173719.2311474-1-lizhi.hou@amd.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/23/2026 6:37 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: Karol Wachowski