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Bluetooth: btmrvl: fix race issue while stopping main thread

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btmrvl_remove_card() calls kthread_stop() to stop the main thread,
but kthread_should_stop() is checked when all the activities are done
in the main thread before sleeping.
We will have kthread_should_stop() check as soon as main thread is
woken up. This fixes a crash issue caused due to an invalid memory
access while unnecessarily processing interrupts after card removal.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Amitkumar Karwar 2015-01-01 00:13:39 -08:00 committed by Marcel Holtmann
parent 661cf88acd
commit 8b324fa691
1 changed files with 5 additions and 0 deletions
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5
drivers/bluetooth/btmrvl_main.c
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@ -616,6 +616,11 @@ static int btmrvl_service_main_thread(void *data)
BT_DBG("main_thread woke up");
if (kthread_should_stop()) {
BT_DBG("main_thread: break from main thread");
break;
}
spin_lock_irqsave(&priv->driver_lock, flags);
if (adapter->int_count) {
adapter->int_count = 0;