From: Dmitry Baryshkov Date: Fri, 6 Dec 2024 09:43:05 +0000 (+0200) Subject: drm/bridge: anx7625: use eld_mutex to protect access to connector->eld X-Git-Tag: block-6.14-20240131~40^2~13^2~49 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=e72bf423a60afd744d13e40ab2194044a3af5217;p=linux-block.git drm/bridge: anx7625: use eld_mutex to protect access to connector->eld 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 Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-2-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov --- diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 3427322f986a..6238eabd2328 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -2002,8 +2002,10 @@ static int anx7625_audio_get_eld(struct device *dev, void *data, memset(buf, 0, len); } else { dev_dbg(dev, "audio copy eld\n"); + mutex_lock(&ctx->connector->eld_mutex); memcpy(buf, ctx->connector->eld, min(sizeof(ctx->connector->eld), len)); + mutex_unlock(&ctx->connector->eld_mutex); } return 0;