This is a note to let you know that I've just added the patch titled
drm/vmwgfx: Fix a potential infinite spin waiting for fifo idle
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-vmwgfx-fix-a-potential-infinite-spin-waiting-for-fifo-idle.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f01ea0c3d9db536c64d47922716d8b3b8f21d850 Mon Sep 17 00:00:00 2001
From: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Date: Thu, 28 Aug 2014 11:53:23 +0200
Subject: drm/vmwgfx: Fix a potential infinite spin waiting for fifo idle
From: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
commit f01ea0c3d9db536c64d47922716d8b3b8f21d850 upstream.
The code waiting for fifo idle was incorrect and could possibly spin
forever under certain circumstances.
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Reported-by: Mark Sheldon <markshel@xxxxxxxxxx>
Reviewed-by: Jakob Bornecrantz <jakob@xxxxxxxxxx>
Reivewed-by: Mark Sheldon <markshel@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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);
Patches currently in stable-queue which might be from thellstrom@xxxxxxxxxx are
queue-3.16/drm-vmwgfx-fix-a-potential-infinite-spin-waiting-for-fifo-idle.patch
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