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Subject[PATCH 1/6] Drivers: hv: vmbus: Properly handle child device remove
Date
Handle the case when the device may be removed when the device has no driver
attached to it.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
---
drivers/hv/vmbus_drv.c | 15 +++++++++------
1 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index da4333b..04bdc0f 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -508,14 +508,17 @@ static int vmbus_probe(struct device *child_device)
*/
static int vmbus_remove(struct device *child_device)
{
- struct hv_driver *drv = drv_to_hv_drv(child_device->driver);
+ struct hv_driver *drv;
struct hv_device *dev = device_to_hv_device(child_device);

- if (drv->remove)
- drv->remove(dev);
- else
- pr_err("remove not set for driver %s\n",
- dev_name(child_device));
+ if (child_device->driver) {
+ drv = drv_to_hv_drv(child_device->driver);
+ if (drv->remove)
+ drv->remove(dev);
+ else
+ pr_err("remove not set for driver %s\n",
+ dev_name(child_device));
+ }

return 0;
}
--
1.7.4.1


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