ssb: Make the GPIO API reentrancy safe

This fixes the GPIO API to be reentrancy safe.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index 9028ed5715a1..af07ab22708f 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -569,6 +569,9 @@ static int ssb_bus_register(struct ssb_bus *bus,
 
         spin_lock_init(&bus->bar_lock);
         INIT_LIST_HEAD(&bus->list);
+#ifdef CONFIG_SSB_EMBEDDED
+        spin_lock_init(&bus->gpio_lock);
+#endif
 
         /* Powerup the bus */
         err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);