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 73ED61D88D7; Tue, 27 May 2025 17:22:45 +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=1748366565; cv=none; b=KLLcL5y3I1IYcbrhUnEIhw9mu1Zef/GZJ1jH42ywYxPbSzhj6SOK0afaErmJm2qlG7Fh78tu47TCQTYx/04m/mWzIqdtplPvZKOl7zEStQwlVjqtD+v6EUcVJp4SJ66KsqVw9eInKgJgFCqoOoPWMfWaax2XTlAw26b9MdC4zYQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748366565; c=relaxed/simple; bh=mG2BGYiezbuEEQPQhe8WN3qyYj6hhn450rUG6wsznVs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QeLsX38EWQ6feI13A06xQlytRAxXNbaATHKmyPVXFirC2w+cmv6DASwDk8cpjfPyLMYWFSfa8GAtkN+hcLOd2wPSJ+o72rr4LMr50PKTklqoDqA7sceh3srzhPfUHX8m/+wZhB7fCBMA919OD2mS0tmq3smdXi0KKbtM4QTnihk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=07YyozUX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="07YyozUX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC1ABC4CEE9; Tue, 27 May 2025 17:22:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748366565; bh=mG2BGYiezbuEEQPQhe8WN3qyYj6hhn450rUG6wsznVs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=07YyozUXUx9wvZIEgrnf8N0S9iQ2LBbP5k3H8+FKM/UlTqH7I2XcPuzh7XZ9ztgv5 elQDGzHSwJmolByXSV1GlDZzpv3K0zz7sL2jz3VVZEVVSOIZ2pg6tCaaHCtgJAhvRr Q4SJ8KV0hXHBPmbt+kF8xCBfKgoeckuTNJE8ilEM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stefan Wahren , Sasha Levin Subject: [PATCH 6.14 109/783] staging: vchiq_arm: Create keep-alive thread during probe Date: Tue, 27 May 2025 18:18:26 +0200 Message-ID: <20250527162517.590669889@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250527162513.035720581@linuxfoundation.org> References: <20250527162513.035720581@linuxfoundation.org> User-Agent: quilt/0.68 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 6.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stefan Wahren [ Upstream commit 86bc8821700665ad3962f3ef0d93667f59cf7031 ] Creating the keep-alive thread in vchiq_platform_init_state have the following advantages: - abort driver probe if kthread_create fails (more consistent behavior) - make resource release process easier Since vchiq_keepalive_thread_func is defined below vchiq_platform_init_state, the latter must be moved. Signed-off-by: Stefan Wahren Link: https://lore.kernel.org/r/20250309125014.37166-5-wahrenst@gmx.net Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- .../interface/vchiq_arm/vchiq_arm.c | 69 +++++++++---------- 1 file changed, 34 insertions(+), 35 deletions(-) diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c index 0c7ea2d0ee85e..64f9536f12329 100644 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c @@ -280,29 +280,6 @@ static int vchiq_platform_init(struct platform_device *pdev, struct vchiq_state return 0; } -int -vchiq_platform_init_state(struct vchiq_state *state) -{ - struct vchiq_arm_state *platform_state; - - platform_state = devm_kzalloc(state->dev, sizeof(*platform_state), GFP_KERNEL); - if (!platform_state) - return -ENOMEM; - - rwlock_init(&platform_state->susp_res_lock); - - init_completion(&platform_state->ka_evt); - atomic_set(&platform_state->ka_use_count, 0); - atomic_set(&platform_state->ka_use_ack_count, 0); - atomic_set(&platform_state->ka_release_count, 0); - - platform_state->state = state; - - state->platform_state = (struct opaque_platform_state *)platform_state; - - return 0; -} - static struct vchiq_arm_state *vchiq_platform_get_arm_state(struct vchiq_state *state) { return (struct vchiq_arm_state *)state->platform_state; @@ -1011,6 +988,39 @@ vchiq_keepalive_thread_func(void *v) return 0; } +int +vchiq_platform_init_state(struct vchiq_state *state) +{ + struct vchiq_arm_state *platform_state; + char threadname[16]; + + platform_state = devm_kzalloc(state->dev, sizeof(*platform_state), GFP_KERNEL); + if (!platform_state) + return -ENOMEM; + + snprintf(threadname, sizeof(threadname), "vchiq-keep/%d", + state->id); + platform_state->ka_thread = kthread_create(&vchiq_keepalive_thread_func, + (void *)state, threadname); + if (IS_ERR(platform_state->ka_thread)) { + dev_err(state->dev, "couldn't create thread %s\n", threadname); + return PTR_ERR(platform_state->ka_thread); + } + + rwlock_init(&platform_state->susp_res_lock); + + init_completion(&platform_state->ka_evt); + atomic_set(&platform_state->ka_use_count, 0); + atomic_set(&platform_state->ka_use_ack_count, 0); + atomic_set(&platform_state->ka_release_count, 0); + + platform_state->state = state; + + state->platform_state = (struct opaque_platform_state *)platform_state; + + return 0; +} + int vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service, enum USE_TYPE_E use_type) @@ -1331,7 +1341,6 @@ void vchiq_platform_conn_state_changed(struct vchiq_state *state, enum vchiq_connstate newstate) { struct vchiq_arm_state *arm_state = vchiq_platform_get_arm_state(state); - char threadname[16]; dev_dbg(state->dev, "suspend: %d: %s->%s\n", state->id, get_conn_state_name(oldstate), get_conn_state_name(newstate)); @@ -1346,17 +1355,7 @@ void vchiq_platform_conn_state_changed(struct vchiq_state *state, arm_state->first_connect = 1; write_unlock_bh(&arm_state->susp_res_lock); - snprintf(threadname, sizeof(threadname), "vchiq-keep/%d", - state->id); - arm_state->ka_thread = kthread_create(&vchiq_keepalive_thread_func, - (void *)state, - threadname); - if (IS_ERR(arm_state->ka_thread)) { - dev_err(state->dev, "suspend: Couldn't create thread %s\n", - threadname); - } else { - wake_up_process(arm_state->ka_thread); - } + wake_up_process(arm_state->ka_thread); } static const struct of_device_id vchiq_of_match[] = { -- 2.39.5