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 B341A1AD3E0; Sun, 26 Jan 2025 14:55:41 +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=1737903341; cv=none; b=BNAZ9kTnDIBGrlXPsMNVzHBEfNBFdWOFvBSXAX65OBAjjWTKgcPXKG3rSmYcbYRVrTTm8H8qcGocqODIKOm5A2oD1/QeArC2baiHZWOg/oKT0U1b91hwNyDIr6A3glRDyqq5iPy6CKQQ5ETVkoin7uHiCwYAN3MJbp0Hw6cxMM4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903341; c=relaxed/simple; bh=E6eskXtNKGqY6mkbJuUK27kMepWR2x2b9c2rs0dxXCs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=UfgOZqCj6YcQHXHATNpHFd7yhLFvbrHVJ6DgMWBcT7KoimbnXPCTptmQqCapKrKM1l9ursRNePis4lHmG2mSwLmQyByi77AJw74T33+mFj/xBufKg87rBcgcZMmJgHneAbzhiNWU/o0dcTRtA19svzbLQYDPG+nOb+k+87qoltM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lQnSJ2q1; 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="lQnSJ2q1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E87A1C4CED3; Sun, 26 Jan 2025 14:55:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903341; bh=E6eskXtNKGqY6mkbJuUK27kMepWR2x2b9c2rs0dxXCs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lQnSJ2q1gDgBMCscAlbgaGTHG5HOPFOA7i6eDE7YMWaN8CdWoD1Kva973sJGLSF2i QVlVj8cFJBZmD1xFWltqcvMkP0XN2Ks+itAJuiZJ3aifeQ3bq1Cuo9Jyu9WUA84zxH AsVO5MXzBA/w9IjP4+k9kt0MGR9E//rPhPltN/G8g4sCB2H4gPIRbfleTzc9WLnLkK j1zPZTbmyEtIi/Zo3PlditWCKnCSissFuv0HShPwkDvw2bL7/C395HQzNHV2QcIq8U ixds4+BBQ+VnMsYOkQiBOyumLnYddPVC6YK6DEOc4qYndeASe4beGhX+qunqRvLpPg ykhvpRpeOA08w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Baryshkov , Maxime Ripard , Raphael Gallais-Pou , Sasha Levin , alain.volmat@foss.st.com, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.12 18/31] drm/sti: hdmi: use eld_mutex to protect access to connector->eld Date: Sun, 26 Jan 2025 09:54:34 -0500 Message-Id: <20250126145448.930220-18-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250126145448.930220-1-sashal@kernel.org> References: <20250126145448.930220-1-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 6.12.11 Content-Transfer-Encoding: 8bit From: Dmitry Baryshkov [ Upstream commit e99c0b517bcd53cf61f998a3c4291333401cb391 ] Reading access to connector->eld can happen at the same time the drm_edid_to_eld() updates the data. Take the newly added eld_mutex in order to protect connector->eld from concurrent access. Reviewed-by: Maxime Ripard Acked-by: Raphael Gallais-Pou Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-9-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin --- drivers/gpu/drm/sti/sti_hdmi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c index 847470f747c0e..3c8f3532c7972 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.c +++ b/drivers/gpu/drm/sti/sti_hdmi.c @@ -1225,7 +1225,9 @@ static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size struct drm_connector *connector = hdmi->drm_connector; DRM_DEBUG_DRIVER("\n"); + mutex_lock(&connector->eld_mutex); memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + mutex_unlock(&connector->eld_mutex); return 0; } -- 2.39.5