Currently we get a null pointer dereference when booting linux on RPi
which use "uart-pl011" driver. This driver doesn't implement a remove
driver callback. This patch adds a check before calling the remove
callback if the driver which use the amba bus implement such
functionality.
Signed-off-by: Alexander Aring <alex.aring@xxxxxxxxx>
---
drivers/amba/bus.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index b934e11..ddd9661 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -70,7 +70,8 @@ static void amba_remove(struct device_d *dev)
struct amba_device *pcdev = to_amba_device(dev);
struct amba_driver *drv = to_amba_driver(dev->driver);
- drv->remove(pcdev);
+ if (drv->remove)
+ drv->remove(pcdev);
}
struct bus_type amba_bustype = {
--
2.6.1
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