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 9178B192D6D; Tue, 10 Sep 2024 10:16:58 +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=1725963418; cv=none; b=Cstfqo7NQvAjdZXoiG3Dk2+h8LR2hd8t1sem5mnCNqGZkoPiRxAqhlCfwd179Qu4SYwxDcJNVObIq26RyEViGpqAPXr0pDMeQ7An8slBNpd4zjNFPHEf8OhRcSBTbbx/6+HW8psS7eOxPOhFldLoBy6t6F2JcfXe60eBUWtAdL4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725963418; c=relaxed/simple; bh=wDwkZoxsFg/zVfRxSKt1dW8Epso7WGxAVMMz8iVzasQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jhXmZGT4DZF8j1eoFOpWs2pSdM7SHtyJsPTgv/0Yr8qcpIMx9eCA1iGxXn3/r1c7UWv4YuN7uXU8pu0uS3Uw1vkbBy1QoGMcVvcTKal5XAkSENSBppczpCftLZrSspAvTnjkkmn66NKkwgmbsElp0/BUeTh/vid7MPjDDh1qyEo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=baEX9RqL; 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="baEX9RqL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2156C4CEC3; Tue, 10 Sep 2024 10:16:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1725963418; bh=wDwkZoxsFg/zVfRxSKt1dW8Epso7WGxAVMMz8iVzasQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=baEX9RqL9A4O0Cn9umk4vo3sOBMD4tG57sEBO9Q645K0H1DrDXnynlZ2UVJCI4nWa J4eHW0agFQg/NcQemHrCLzTiTpp1lkxYn9/eic/eRFSallHy5ohnSf7gR718DePWsL RbN5dA5jWbmZKILF5w6NAk6Hc1ttA1JdC2zQIn7A= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Marek Vasut , Robert Foss , Sasha Levin Subject: [PATCH 5.15 050/214] drm/bridge: tc358767: Check if fully initialized before signalling HPD event via IRQ Date: Tue, 10 Sep 2024 11:31:12 +0200 Message-ID: <20240910092600.814663922@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240910092558.714365667@linuxfoundation.org> References: <20240910092558.714365667@linuxfoundation.org> User-Agent: quilt/0.67 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Marek Vasut [ Upstream commit 162e48cb1d84c2c966b649b8ac5c9d4f75f6d44f ] Make sure the connector is fully initialized before signalling any HPD events via drm_kms_helper_hotplug_event(), otherwise this may lead to NULL pointer dereference. Signed-off-by: Marek Vasut Reviewed-by: Robert Foss Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20240531203333.277476-1-marex@denx.de Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/tc358767.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index 4c6f3052156b..3436d39c90b4 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -1527,7 +1527,7 @@ static irqreturn_t tc_irq_handler(int irq, void *arg) dev_err(tc->dev, "syserr %x\n", stat); } - if (tc->hpd_pin >= 0 && tc->bridge.dev) { + if (tc->hpd_pin >= 0 && tc->bridge.dev && tc->aux.drm_dev) { /* * H is triggered when the GPIO goes high. * -- 2.43.0