From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 2F53B33A9FC; Thu, 28 May 2026 20:42:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780000935; cv=none; b=CHkFsjltc+cWISv9hGI9IZ8eEGn5nAZ/JnO/BgEakfwtnsHN6fKl+3Pd60ahCaoxh4AJRtlsXEARFXKJF8yD8uZdgp0D/cyFwwhLLmjkr+5+y6bwDrfYULkhsdAdsLU7tp5lyW9bHVmuzZVWH9BlV5mdSEvgEdHZOxRZOp2VYyA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780000935; c=relaxed/simple; bh=3vug1REUfHAkQVtTA8EAjhEL6wp7ELSiEupLoj282x4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jruzOE/AkgDfQ4Zd69L6V9oiUyePdZVL7Dm+hE9unTz+E6dMLIDfShGhBwWIcaQjDUt1Q+Nf0CuSMV0Pn8ZAXL71WyWPO6qD9WHde0wzEeupgZkGd8phBOs+zT3KnPQpYXw6qUV8hDI2Ev7Jclx/Yej8Uh0GAzcBpPi37/LqHKs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=XrsWbKOB; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="XrsWbKOB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8E87A1F000E9; Thu, 28 May 2026 20:42:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780000934; bh=6GRB7uJiVSfDuq63Ou99RReOF+FG5vRwh821P1PZySw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=XrsWbKOB7Bws1AsXUnQza6vDhdlVSMk5tQWBZEhubR4+nMtnXgFIq6zMNYFhEM+xI P02lXwZbM/j+I9gqFmTYweqNYYClRmiLFMewTS96mgOVFaF8LpJH+sVsxVIDdlKTzU BA68KvQAr0SG24krmlFqwvHtB3aw4pWYxFNM1a3o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mikko Perttunen , Rob Clark , Sasha Levin Subject: [PATCH 6.12 222/272] drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN Date: Thu, 28 May 2026 21:49:56 +0200 Message-ID: <20260528194635.412934271@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260528194629.379955525@linuxfoundation.org> References: <20260528194629.379955525@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mikko Perttunen [ Upstream commit 55e0f0d1c1a4ee1e46da7da4d443eb3044fb3851 ] Commit "iommu: return full error code from iommu_map_sg[_atomic]()" changed iommu_map_sgtable() to return an ssize_t and negative values in error cases, rather than a size_t and a zero. Store the return value in the appropriate type and in case of error, return it rather than WARNing. Fixes: ad8f36e4b6b1 ("iommu: return full error code from iommu_map_sg[_atomic]()") Signed-off-by: Mikko Perttunen Patchwork: https://patchwork.freedesktop.org/patch/719685/ Message-ID: <20260421-iommu_map_sgtable-return-v1-3-fb484c07d2a1@nvidia.com> Signed-off-by: Rob Clark Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/msm_iommu.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index 2a94e82316f95..8231488577f4d 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -362,14 +362,15 @@ static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt, size_t len, int prot) { struct msm_iommu *iommu = to_msm_iommu(mmu); - size_t ret; + ssize_t ret; /* The arm-smmu driver expects the addresses to be sign extended */ if (iova & BIT_ULL(48)) iova |= GENMASK_ULL(63, 49); ret = iommu_map_sgtable(iommu->domain, iova, sgt, prot); - WARN_ON(!ret); + if (ret < 0) + return ret; return (ret == len) ? 0 : -EINVAL; } -- 2.53.0