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 E047576C75; Mon, 29 Jan 2024 17:17:30 +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=1706548651; cv=none; b=E5voJHy425opoNrSlzZBMKeGeWFHPK188Mx6ZvC9Vwx+OrDdGYnEGRMv7OfuA2laxmmXwv+zBoe+76JhDQC7n08zeZru7t2EXyfm+cXpzZCvHuB9uaoDP++z4JYArcRnRl1+6wiO8A+4JxeCSmrAQvTQT0ObbKeHK93vK1kOC/U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706548651; c=relaxed/simple; bh=4Ts5iF+LfaIHVzxL75odvJ/amyWtjbw0bHsvdPdJwNM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VpzSJaWLPVav4eAMOg2smPQMTegolnFdc0xs8KTE/Vrh5xkujszzzGW5ZdeTadxmnJ4Xh2g9DVewMyz5q0H+bFNUnAd+fG4wGEEo4acoVwMdqlmPbih/NH8ozIiDjBUbuL+L0ESG0kGv16J7oIctaBOVEZnwtzmbNmJHZmn9u1c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=V01h8PFw; 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="V01h8PFw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A7502C433F1; Mon, 29 Jan 2024 17:17:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1706548650; bh=4Ts5iF+LfaIHVzxL75odvJ/amyWtjbw0bHsvdPdJwNM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V01h8PFwuhonyTiVIXgaCeenFQtdl52Rtk7s4VN0MCWcm2+Q2xDaSlMNkU60LpQYs YhrPpohh/5kJTDuyutWXmPDI0dX9rA1wQiSb/GV3Xtkd0U5LtvSbtyUvB56jAdzn6g g8SGTIZKmtygRUBpJhrh3JyfFuLz8kzxD50mipHM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hsin-Yi Wang , Douglas Anderson , Sasha Levin Subject: [PATCH 6.6 306/331] drm/bridge: parade-ps8640: Make sure we drop the AUX mutex in the error case Date: Mon, 29 Jan 2024 09:06:10 -0800 Message-ID: <20240129170023.836847913@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240129170014.969142961@linuxfoundation.org> References: <20240129170014.969142961@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Douglas Anderson [ Upstream commit a20f1b02bafcbf5a32d96a1d4185d6981cf7d016 ] After commit 26db46bc9c67 ("drm/bridge: parade-ps8640: Ensure bridge is suspended in .post_disable()"), if we hit the error case in ps8640_aux_transfer() then we return without dropping the mutex. Fix this oversight. Fixes: 26db46bc9c67 ("drm/bridge: parade-ps8640: Ensure bridge is suspended in .post_disable()") Reviewed-by: Hsin-Yi Wang Signed-off-by: Douglas Anderson Link: https://patchwork.freedesktop.org/patch/msgid/20240117103502.1.Ib726a0184913925efc7e99c4d4fc801982e1bc24@changeid Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/parade-ps8640.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c index 166bfc725ef4..14d4dcf239da 100644 --- a/drivers/gpu/drm/bridge/parade-ps8640.c +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -351,11 +351,13 @@ static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux, ret = _ps8640_wait_hpd_asserted(ps_bridge, 200 * 1000); if (ret) { pm_runtime_put_sync_suspend(dev); - return ret; + goto exit; } ret = ps8640_aux_transfer_msg(aux, msg); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); + +exit: mutex_unlock(&ps_bridge->aux_lock); return ret; -- 2.43.0