NAK,
The mutex unlock is done in vmw_fifo_commit. The mutex is protecting the
fifo memory against multiple simultaneous reservers.
/Thomas
On 08/04/2012 07:33 AM, Devendra Naga wrote:
we have done a proper mutex_unlock in the error cases of the vmw_fifo_reserve,
but
there are missing mutex unlocks where we return a valid pointer in
vmw_fifo_reserve.
Signed-off-by: Devendra Naga <develkernel412...@gmail.com>
---
drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
index a0c2f12..e3abd7a 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c
@@ -355,6 +355,7 @@ void *vmw_fifo_reserve(struct vmw_private *dev_priv,
uint32_t bytes)
if (reserveable)
iowrite32(bytes, fifo_mem +
SVGA_FIFO_RESERVED);
+ mutex_unlock(&fifo_state->fifo_mutex);
return fifo_mem + (next_cmd >> 2);
} else {
need_bounce = true;
@@ -363,10 +364,12 @@ void *vmw_fifo_reserve(struct vmw_private *dev_priv,
uint32_t bytes)
if (need_bounce) {
fifo_state->using_bounce_buffer = true;
- if (bytes < fifo_state->static_buffer_size)
+ if (bytes < fifo_state->static_buffer_size) {
+ mutex_unlock(&fifo_state->fifo_mutex);
return fifo_state->static_buffer;
- else {
+ } else {
fifo_state->dynamic_buffer = vmalloc(bytes);
+ mutex_unlock(&fifo_state->fifo_mutex);
return fifo_state->dynamic_buffer;
}
}
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