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 9D37D149C42; Thu, 1 Aug 2024 00:15:10 +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=1722471310; cv=none; b=gPxX3+XTB9YAC9zPoBh8QpTQEt0idqgzpguJuNTY2UtjKaMPWQgWwOI1BOEW8H95JTwFlny07cUNVg3Rnnxu24e/brYgwWXZStYgOAqjoH5HO21QrRgCWFxwAt1/STVi0jJct9R6JxmneyindbjdQX0WIPonIlE6AlkcnLbCWfs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722471310; c=relaxed/simple; bh=fT+DufGfvPNVO/oTNu6ZcpvepwwnEFNtyq6TQYm4QfQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=D73q9b1HCEsqIIaebxMC2ac0GODVc4/O/sKWl+uWmTOGcFYgf0Yd4SiaBf3jj0Bq8VNN2bHK2y1Y96s9EcME1ueJIQ7Y9HNx389k4let40a2pRwlFL7sPYKhX/lEp2Hx9rgtpXDnnspRSuWdR8z6NMdQn/o2YT9XMJpvZ103YqA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UXAQEkJt; 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="UXAQEkJt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9FF95C4AF0F; Thu, 1 Aug 2024 00:15:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722471310; bh=fT+DufGfvPNVO/oTNu6ZcpvepwwnEFNtyq6TQYm4QfQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UXAQEkJtmVlm1D3EJ6PibXn2m33eosIxUbtSelA0hHPlhs7lh+CAdRzhHZy37aZv9 dFSORX+C4TdweDGhPdVre2yModbLRs+Tvnwz6q4L/VOufbbP1e/D6eWp8OQcRprpzI blhMu7Q6kSeesCDlf3r8U8FT9jB3wSlV2nRdrBjgsrwHaLvTKludPs+8bQ1u1n3mSz i2ikLIWCIHG7XK7+3/0vkW8PXqL1QYpJID7r+Cy7pHz//4nphfTOB+W12Imm2c8gtE igbhI9SisoTCSQoNgTwW34sOXA3SM3Cup1kPfsOxrYYfnL+weY8wGlXZoaX2VA2ks9 rthb+S2cVmfYg== 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 6.10 066/121] drm/bridge: tc358767: Check if fully initialized before signalling HPD event via IRQ Date: Wed, 31 Jul 2024 20:00:04 -0400 Message-ID: <20240801000834.3930818-66-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240801000834.3930818-1-sashal@kernel.org> References: <20240801000834.3930818-1-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 6.10.2 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 166f9a3e9622d..332f0aa50fee4 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -2135,7 +2135,7 @@ 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