The current mechanism for handling references in broken.
Introduce a lock to protect the ext field in hv_device.
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
---
drivers/staging/hv/hyperv.h | 3 +++
drivers/staging/hv/vmbus_drv.c | 1 +
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/hv/hyperv.h b/drivers/staging/hv/hyperv.h
index c4a9f38..82ba110 100644
--- a/drivers/staging/hv/hyperv.h
+++ b/drivers/staging/hv/hyperv.h
@@ -826,6 +826,9 @@ struct hv_device {
struct vmbus_channel *channel;
+ /* This lock protects the device extension field */
+ spinlock_t ext_lock;
+
/* Device extension; */
void *ext;
};
diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
index ffd6066..29c1712 100644
--- a/drivers/staging/hv/vmbus_drv.c
+++ b/drivers/staging/hv/vmbus_drv.c
@@ -578,6 +578,7 @@ struct hv_device *vmbus_child_device_create(uuid_le *type,
return NULL;
}
+ spin_lock_init(&child_device_obj->ext_lock);
child_device_obj->channel = channel;
memcpy(&child_device_obj->dev_type, type, sizeof(uuid_le));
memcpy(&child_device_obj->dev_instance, instance,
--
1.7.4.1
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
