From nobody Fri Apr 3 03:20:27 2026 Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) (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 ECA0A3009EE for ; Wed, 25 Mar 2026 09:00:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.118.77.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774429234; cv=none; b=hn6p2Xe62hN+QUFKG2qFY9dDCVEF0Ukdy1XO7cdiylvLEBUDqqZ8KV3zQplXi23L58fuMAcFwU/A7KHs4fER3Z6Y270dEXw58Wm/o6XizAhZvPVi17Ho+n51UPP1qBrXD1LNU4XFSODi3My0xsReiY10dwD3HTCHfj747GbUOzc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774429234; c=relaxed/simple; bh=CPcTlIJgIyK5T1j0XTj81N/5/UyvrLhYjXjqTIrrO1s=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:MIME-Version: Content-Type:References; b=Xvl4HkyiJ0ZAL0KJ+6mnqe7i4OhJnY8YxvCQOttgD4IoJlsG1qcMBFxHec+XBpHQzTPLgRLoGmScpLTGt5HRJCP0gKwqAF32L0RUPEeqVhuij79OBktoEVbdNT+sN8IvhFsJLnEk76//OdREOMm8AC6HrlUnsHr+2ltT6Tj0HDc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=FY5iUkMt; arc=none smtp.client-ip=210.118.77.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="FY5iUkMt" Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20260325090031euoutp0126bd3d54765ffcfa62ddd3a5c4327fb4~gCfwhPZA62240722407euoutp01c for ; Wed, 25 Mar 2026 09:00:31 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20260325090031euoutp0126bd3d54765ffcfa62ddd3a5c4327fb4~gCfwhPZA62240722407euoutp01c DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1774429231; bh=qDkZBH8D9QGZmacGWO/wLlPET8ve8kNAHImwlz5MpvM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FY5iUkMtR9ARTfG7/tVvrcKFos/ZapigxegUHHHt0vVky5lQ6qCjTliLvuGask1oQ 21IwycinJ4E1/p2/flJXeKCCStkMrEvvF8uaS2bNbvl9sZI5ui9VowP/SNvPuwSh2c 8+0fWXCDgF7ZVqkiXWdFAzAcncbLr7/irtU2PxMc= Received: from eusmtip1.samsung.com (unknown [203.254.199.221]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20260325090031eucas1p185465a9f6f2a06a4b1d0cb2b13a92aef~gCfwMvlkl0601006010eucas1p13; Wed, 25 Mar 2026 09:00:31 +0000 (GMT) Received: from AMDC4653.digital.local (unknown [106.120.51.32]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20260325090030eusmtip1a3370e43b1c03e214df9fdc959e30922~gCfvqWu7e0170001700eusmtip1S; Wed, 25 Mar 2026 09:00:30 +0000 (GMT) From: Marek Szyprowski To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux.dev Cc: Marek Szyprowski , Rob Herring , Krzysztof Kozlowski , Oreoluwa Babatunde , Saravana Kannan , Andrew Morton , Robin Murphy Subject: [PATCH v3 2/7] of: reserved_mem: use -ENODEV instead of -ENOENT Date: Wed, 25 Mar 2026 10:00:18 +0100 Message-Id: <20260325090023.3175348-3-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260325090023.3175348-1-m.szyprowski@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CMS-MailID: 20260325090031eucas1p185465a9f6f2a06a4b1d0cb2b13a92aef X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20260325090031eucas1p185465a9f6f2a06a4b1d0cb2b13a92aef X-EPHeader: CA X-CMS-RootMailID: 20260325090031eucas1p185465a9f6f2a06a4b1d0cb2b13a92aef References: <20260325090023.3175348-1-m.szyprowski@samsung.com> When given reserved memory region doesn't really support given node, return -ENODEV instead of -ENOENT. Then fix __reserved_mem_init_node() function to properly propagate error code different from -ENODEV instead of silently ignoring it. Signed-off-by: Marek Szyprowski --- drivers/of/of_reserved_mem.c | 7 ++++--- kernel/dma/coherent.c | 2 +- kernel/dma/contiguous.c | 2 +- 3 files changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 6705b7afebf0..9aff460a0420 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -488,9 +488,10 @@ static int __init __reserved_mem_init_node(struct rese= rved_mem *rmem, { extern const struct of_device_id __reservedmem_of_table[]; const struct of_device_id *i; - int ret =3D -ENOENT; + int ret =3D -ENODEV; =20 - for (i =3D __reservedmem_of_table; i < &__rmem_of_table_sentinel; i++) { + for (i =3D __reservedmem_of_table; ret =3D=3D -ENODEV && + i < &__rmem_of_table_sentinel; i++) { reservedmem_of_init_fn initfn =3D i->data; const char *compat =3D i->compatible; =20 @@ -574,7 +575,7 @@ static void __init fdt_init_reserved_mem_node(struct re= served_mem *rmem, nomap =3D of_get_flat_dt_prop(node, "no-map", NULL) !=3D NULL; =20 err =3D __reserved_mem_init_node(rmem, node); - if (err !=3D 0 && err !=3D -ENOENT) { + if (err !=3D 0 && err !=3D -ENODEV) { pr_info("node %s compatible matching fail\n", rmem->name); if (nomap) memblock_clear_nomap(rmem->base, rmem->size); diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c index 34621acbd3c5..64f9ba618e19 100644 --- a/kernel/dma/coherent.c +++ b/kernel/dma/coherent.c @@ -370,7 +370,7 @@ static const struct reserved_mem_ops rmem_dma_ops =3D { static int __init rmem_dma_setup(unsigned long node, struct reserved_mem *= rmem) { if (of_get_flat_dt_prop(node, "reusable", NULL)) - return -EINVAL; + return -ENODEV; =20 #ifdef CONFIG_ARM if (!of_get_flat_dt_prop(node, "no-map", NULL)) { diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index 81a2fa4971ee..e6fc6906b5c0 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -483,7 +483,7 @@ static int __init rmem_cma_setup(unsigned long node, st= ruct reserved_mem *rmem) =20 if (!of_get_flat_dt_prop(node, "reusable", NULL) || of_get_flat_dt_prop(node, "no-map", NULL)) - return -EINVAL; + return -ENODEV; =20 if (!IS_ALIGNED(rmem->base | rmem->size, CMA_MIN_ALIGNMENT_BYTES)) { pr_err("Reserved memory: incorrect alignment of CMA region\n"); --=20 2.34.1