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 F1CB01C4630; Thu, 1 Aug 2024 00:24:31 +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=1722471872; cv=none; b=Ah5bjScAIt1FEJY/IcnOfXFrHIcJchunIzojWLvhIicUMF8ePTVyk8zZj9v0k30mA0t4LeecVcgOl5de9vANU5e3nmrHV/FSDi7vUT1m9M6l8gKEPAxJSKu41kmm0fKPaujauluVKy9CnLJh7d6Ol1JkP0gbwSBWtIJcHz3VOPU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722471872; c=relaxed/simple; bh=rBIERfZuo3k4sMYDo5jAH7EmUxizoU1twJtJjoHUsG8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mh0udD2MtZIWygl52z8nJrFN0oWXVkcLegWvkRhoSDNUbYmb5jj6BHuhNllNs05WbNlO3Jp+SCRSNGdMNZQeAcm905A2Q72xW72V2z71qauQurY2mxx//E5vKfOI8/JPRl1SDUFM1xJfs/YYvZ5Ja4AwglDZAXeDV/VhLblNdRo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Wx4HaioJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Wx4HaioJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D27EC32786; Thu, 1 Aug 2024 00:24:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722471871; bh=rBIERfZuo3k4sMYDo5jAH7EmUxizoU1twJtJjoHUsG8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wx4HaioJJ4/vgVcV0Kfr+YE212gtraH+ioOoG6TdMKlCtXfjfUsXTnrzhX0wWCQ9O v+LVQD9MOqPqORRRVc2RrfQk5aPVNnHDD/jfcssJovLz57+MZOrkd6IXIuAIxEe66Y OyFVFGdRYXB0Dqob2/8T73p/qVe8bok9hjhcdA5Z/A35lZekwsyEpLBF333pNZFxyy gYar+Fk1jqgXYKK+la7Yq1MZobZAiAqoZxFYpEszC9i6PyK+2NqtKeNgU0CLyafzib fWGN9daCxW9MD6S9o0cxztFUMqnUq0Ko0bP/zjriYuifMljnBRPPh2B45lJiiRGcVf Hg9wqhqTl2iXg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Marek Vasut , Robert Foss , Sasha Levin , andrzej.hajda@intel.com, neil.armstrong@linaro.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.6 46/83] drm/bridge: tc358767: Check if fully initialized before signalling HPD event via IRQ Date: Wed, 31 Jul 2024 20:18:01 -0400 Message-ID: <20240801002107.3934037-46-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240801002107.3934037-1-sashal@kernel.org> References: <20240801002107.3934037-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.43 Content-Transfer-Encoding: 8bit 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 d941c3a0e6113..7fd4a5fe03edf 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -2034,7 +2034,7 @@ 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