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 8B8114071C1 for ; Wed, 8 Jul 2026 09:00:36 +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=1783501241; cv=none; b=c3D0dYc2SBnbB1EWnFc1BGYlq6s3KFiD+82Oi2L0wLCRdWVWNPsjcTZ+iOi+QY0DFIyFgVQerESjtjtpuuShxJfBKHavehhGiFbBFeuv4Q819BQRYomK/S9HYrriITXWAwjJi62Thyr1bPzWMlD6Al54XHubsuNWbxXCw71eFqQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783501241; c=relaxed/simple; bh=Cs/ZSnMZwFzFD+TqYggRUQqvhJCbCCJAXmnUHDggwD4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=S7JevYegMKjlBvSTwLVeT8Ne35sqKkK1JhoAcMkIR+VuNrsVI3mJ0m3zjTWeDNbbApqSAy7pQ/cQv4fcUhlGyDeiiJx5sxUaf8Mwg4BRvnm71j5SnQBrqNWQo/SEeEcds4gIUMniIypq1FtWlyZQY00HCEcidMKBU0BqwAzbMS4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AiexbsC/; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AiexbsC/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D61491F00ACA; Wed, 8 Jul 2026 09:00:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783501236; bh=u8XbDlrGsoh7Ws9WTn9JiFPujht9GtEtWpZVuFjT17s=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=AiexbsC/7tz1c2R0hv1EBFvpStrU3WtapvUq5CtopcQx93d0Xv9rGwiWmt8pzjovn IhAKEs93q2E67UmT7MNLw7GwIFbUus+bnXruAJ2pVg8EB5SOrj+Q8IgcuSaYuRPWVB 1eEKpsQFdWkjEBW451u6s8/u3AYUxCPMw0YBZbi+ygxIeNpAxESUpXDIJeP0wfwriO uHJR6eAZO/6xYwvW5e9dpOp1taKFIDf0vVCdN0nSq3nGHBNgweh8NcbkMnHdA3Upj+ NnkEa8xxg6eL3h3v9Rvc4+kK5v4gkTej1AU2JQAAxal6g2JNlgbK6pAtxTypT7z6ZF QXvscAE1CxWZQ== From: Sudeep Holla Date: Wed, 08 Jul 2026 10:00:08 +0100 Subject: [PATCH v4 12/16] firmware: arm_scmi: Fix OF node reference handling Precedence: bulk X-Mailing-List: arm-scmi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260708-scmi_core_fixes-v4-12-53142cd60b63@kernel.org> References: <20260708-scmi_core_fixes-v4-0-53142cd60b63@kernel.org> In-Reply-To: <20260708-scmi_core_fixes-v4-0-53142cd60b63@kernel.org> To: arm-scmi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Cristian Marussi X-Mailer: b4 0.15.2 SCMI devices store the DT node in dev.of_node through device_set_node(), but that helper only assigns the fwnode and of_node pointers without taking an OF node reference. Take a reference when assigning the node and release it from the SCMI device release path. With the device owning that reference, remove the separate channel-side get/put pair from the core driver. Fixes: 96da4a99ce50 ("firmware: arm_scmi: Set fwnode for the scmi_device") Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scmi/bus.c | 3 ++- drivers/firmware/arm_scmi/driver.c | 4 ---- 2 files changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c index dcaefc1aa892..a14df82a9310 100644 --- a/drivers/firmware/arm_scmi/bus.c +++ b/drivers/firmware/arm_scmi/bus.c @@ -401,6 +401,7 @@ static void scmi_device_release(struct device *dev) struct scmi_device *scmi_dev = to_scmi_dev(dev); scmi_device_release_syspower(scmi_dev); + of_node_put(dev->of_node); kfree_const(scmi_dev->name); kfree(scmi_dev); } @@ -464,7 +465,7 @@ __scmi_device_create(struct device_node *np, struct device *parent, scmi_dev->id = id; scmi_dev->dev.parent = parent; - device_set_node(&scmi_dev->dev, of_fwnode_handle(np)); + device_set_node(&scmi_dev->dev, of_fwnode_handle(of_node_get(np))); scmi_dev->dev.bus = &scmi_bus_type; scmi_dev->dev.release = scmi_device_release; dev_set_name(&scmi_dev->dev, "scmi_dev.%d", id); diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 3e0f0fac9626..515ae884bb2c 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -2789,14 +2789,12 @@ static int scmi_chan_setup(struct scmi_info *info, struct device_node *of_node, devm_kfree(info->dev, cinfo); return -EINVAL; } - of_node_get(of_node); cinfo->id = prot_id; cinfo->dev = &tdev->dev; cinfo->handle = &info->handle; ret = info->desc->ops->chan_setup(cinfo, info->dev, tx); if (ret) { - of_node_put(of_node); scmi_device_destroy(info->dev, prot_id, name); devm_kfree(info->dev, cinfo); return ret; @@ -2820,7 +2818,6 @@ static int scmi_chan_setup(struct scmi_info *info, struct device_node *of_node, /* Destroy channel and device only if created by this call. */ if (tdev) { info->desc->ops->chan_free(prot_id, cinfo, idr); - of_node_put(of_node); scmi_device_destroy(info->dev, prot_id, name); devm_kfree(info->dev, cinfo); } @@ -2906,7 +2903,6 @@ static int scmi_chan_destroy(int id, void *p, void *data) struct scmi_info *info = handle_to_scmi_info(cinfo->handle); struct scmi_device *sdev = to_scmi_dev(cinfo->dev); - of_node_put(cinfo->dev->of_node); scmi_device_destroy(info->dev, cinfo->id, sdev->name); cinfo->dev = NULL; } -- 2.43.0