Merge branch 'stable-3.2' into pandora-3.2

[pandora-kernel.git] / drivers / usb / gadget / f_mass_storage.c

diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 7dbbd1a..25b5ff6 100644 (file)
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -512,7 +512,11 @@ static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
 /* Caller must hold fsg->lock */
 static void wakeup_thread(struct fsg_common *common)
 {
 /* Caller must hold fsg->lock */
 static void wakeup_thread(struct fsg_common *common)
 {

-       smp_wmb();      /* ensure the write of bh->state is complete */
+       /*
+        * Ensure the reading of thread_wakeup_needed
+        * and the writing of bh->state are completed
+        */
+       smp_mb();

        /* Tell the main thread that something has happened */
        common->thread_wakeup_needed = 1;
        if (common->thread_task)
        /* Tell the main thread that something has happened */
        common->thread_wakeup_needed = 1;
        if (common->thread_task)


@@ -732,7 +736,12 @@ static int sleep_thread(struct fsg_common *common)
        }
        __set_current_state(TASK_RUNNING);
        common->thread_wakeup_needed = 0;
        }
        __set_current_state(TASK_RUNNING);
        common->thread_wakeup_needed = 0;

-       smp_rmb();      /* ensure the latest bh->state is visible */
+
+       /*
+        * Ensure the writing of thread_wakeup_needed
+        * and the reading of bh->state are completed
+        */
+       smp_mb();

        return rc;
 }
 
        return rc;
 }