drm/nouveau/pwr: fix missing mutex unlock in a failure path

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/gpu/drm/nouveau/core/subdev/pwr/base.c b/drivers/gpu/drm/nouveau/core/subdev/pwr/base.c
index 9908f1f05a00..d4fd3bc9c66f 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/pwr/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/pwr/base.c
@@ -32,6 +32,11 @@ nouveau_pwr_send(struct nouveau_pwr *ppwr, u32 reply[2],
         struct nouveau_subdev *subdev = nv_subdev(ppwr);
         u32 addr;
 
+        /* wait for a free slot in the fifo */
+        addr  = nv_rd32(ppwr, 0x10a4a0);
+        if (!nv_wait_ne(ppwr, 0x10a4b0, 0xffffffff, addr ^ 8))
+                return -EBUSY;
+
         /* we currently only support a single process at a time waiting
          * on a synchronous reply, take the PPWR mutex and tell the
          * receive handler what we're waiting for
@@ -42,11 +47,6 @@ nouveau_pwr_send(struct nouveau_pwr *ppwr, u32 reply[2],
                 ppwr->recv.process = process;
         }
 
-        /* wait for a free slot in the fifo */
-        addr  = nv_rd32(ppwr, 0x10a4a0);
-        if (!nv_wait_ne(ppwr, 0x10a4b0, 0xffffffff, addr ^ 8))
-                return -EBUSY;
-
         /* acquire data segment access */
         do {
                 nv_wr32(ppwr, 0x10a580, 0x00000001);