usb: musb: fix PM reference leak in musb_irq_work()

pm_runtime_get_sync will increment pm usage counter even it failed.
thus a pairing decrement is needed.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
Link: https://lore.kernel.org/r/20210408091836.55227-1-cuibixuan@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index fc0457d..8f09a38 100644 (file)
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -2070,7 +2070,7 @@ static void musb_irq_work(struct work_struct *data)
        struct musb *musb = container_of(data, struct musb, irq_work.work);
        int error;
 
-       error = pm_runtime_get_sync(musb->controller);
+       error = pm_runtime_resume_and_get(musb->controller);
        if (error < 0) {
                dev_err(musb->controller, "Could not enable: %i\n", error);