3.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thomas Hellstrom <thellst...@vmware.com>
commit f01ea0c3d9db536c64d47922716d8b3b8f21d850 upstream.
The code waiting for fifo idle was incorrect and could possibly spin
forever under certain circumstances.
Signed-off-by: Thomas Hellstrom <thellst...@vmware.com>
Reported-by: Mark Sheldon <marks...@vmware.com>
Reviewed-by: Jakob Bornecrantz <ja...@vmware.com>
Reivewed-by: Mark Sheldon <marks...@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
@@ -180,8 +180,9 @@ void vmw_fifo_release(struct vmw_private
mutex_lock(&dev_priv->hw_mutex);
+ vmw_write(dev_priv, SVGA_REG_SYNC, SVGA_SYNC_GENERIC);
while (vmw_read(dev_priv, SVGA_REG_BUSY) != 0)
- vmw_write(dev_priv, SVGA_REG_SYNC, SVGA_SYNC_GENERIC);
+ ;
dev_priv->last_read_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
--
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