From: Dave Airlie Date: Thu, 16 Jan 2014 04:28:22 +0000 (+1000) Subject: drm/mgag200: fix oops in cursor code. X-Git-Tag: v4.14-rc1~8141^2~18 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=53dac830537b51df555ba5e7ebb236705b7eaa7c;p=platform%2Fkernel%2Flinux-rpi.git drm/mgag200: fix oops in cursor code. In some cases we enter the cursor code with file_priv = NULL causing an oops, we also can try to unpin something that isn't pinned, and this is a good fix for it. Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/mgag200/mgag200_cursor.c b/drivers/gpu/drm/mgag200/mgag200_cursor.c index 801731a..9f9780b 100644 --- a/drivers/gpu/drm/mgag200/mgag200_cursor.c +++ b/drivers/gpu/drm/mgag200/mgag200_cursor.c @@ -22,8 +22,10 @@ static void mga_hide_cursor(struct mga_device *mdev) { WREG8(MGA_CURPOSXL, 0); WREG8(MGA_CURPOSXH, 0); - mgag200_bo_unpin(mdev->cursor.pixels_1); - mgag200_bo_unpin(mdev->cursor.pixels_2); + if (mdev->cursor.pixels_1->pin_count) + mgag200_bo_unpin(mdev->cursor.pixels_1); + if (mdev->cursor.pixels_2->pin_count) + mgag200_bo_unpin(mdev->cursor.pixels_2); } int mga_crtc_cursor_set(struct drm_crtc *crtc, @@ -32,7 +34,7 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc, uint32_t width, uint32_t height) { - struct drm_device *dev = (struct drm_device *)file_priv->minor->dev; + struct drm_device *dev = crtc->dev; struct mga_device *mdev = (struct mga_device *)dev->dev_private; struct mgag200_bo *pixels_1 = mdev->cursor.pixels_1; struct mgag200_bo *pixels_2 = mdev->cursor.pixels_2;