btmrvl: avoid double-disable_irq() race

It's much the same as what we did for mwifiex in:
b9da4d2 mwifiex: avoid double-disable_irq() race

"We have a race where the wakeup IRQ might be in flight while we're
calling mwifiex_disable_wake() from resume(). This can leave us
disabling the IRQ twice.

Let's disable the IRQ and enable it in case if we have double-disabled
it."

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
index d02f2c14df32545782f4d7759bb4409e482cc063..c738baeb6d45cd3281b28ac189b42e2c42b27c85 100644 (file)
--- a/drivers/bluetooth/btmrvl_sdio.c
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -1682,8 +1682,12 @@ static int btmrvl_sdio_resume(struct device *dev)
        /* Disable platform specific wakeup interrupt */
        if (card->plt_wake_cfg && card->plt_wake_cfg->irq_bt >= 0) {
                disable_irq_wake(card->plt_wake_cfg->irq_bt);
-               if (!card->plt_wake_cfg->wake_by_bt)
-                       disable_irq(card->plt_wake_cfg->irq_bt);
+               disable_irq(card->plt_wake_cfg->irq_bt);
+               if (card->plt_wake_cfg->wake_by_bt)
+                       /* Undo our disable, since interrupt handler already
+                        * did this.
+                        */
+                       enable_irq(card->plt_wake_cfg->irq_bt);
        }
 
        return 0;