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Message-Id: <20190626034335.23767-11-sashal@kernel.org>
Date: Tue, 25 Jun 2019 23:43:12 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Hsin-Yi Wang <hsinyi@...omium.org>, CK Hu <ck.hu@...iatek.com>,
Sasha Levin <sashal@...nel.org>,
dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 4.19 11/34] drm/mediatek: clear num_pipes when unbind driver
From: Hsin-Yi Wang <hsinyi@...omium.org>
[ Upstream commit a4cd1d2b016d5d043ab2c4b9c4ec50a5805f5396 ]
num_pipes is used for mutex created in mtk_drm_crtc_create(). If we
don't clear num_pipes count, when rebinding driver, the count will
be accumulated. From mtk_disp_mutex_get(), there can only be at most
10 mutex id. Clear this number so it starts from 0 in every rebind.
Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
Signed-off-by: CK Hu <ck.hu@...iatek.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 3df8a9dbccfe..fd83046d8376 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -393,6 +393,7 @@ static void mtk_drm_unbind(struct device *dev)
drm_dev_unregister(private->drm);
mtk_drm_kms_deinit(private->drm);
drm_dev_put(private->drm);
+ private->num_pipes = 0;
private->drm = NULL;
}
--
2.20.1
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