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mei: Remove all bus devices from the mei_dev list when stopping the MEI 

When stopping the MEI, we should remove and potentially unregister
all bus devices queued on the mei_dev linked list.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler 2014-02-17 15:13:19 +02:00 committed by Greg Kroah-Hartman
parent ba4b60e85d
commit 487056932d
4 changed files with 21 additions and 8 deletions
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16
drivers/misc/mei/bus.c
View File

@ -524,6 +524,22 @@ void mei_cl_bus_rx_event(struct mei_cl *cl)
schedule_work(&device->event_work);
}
void mei_cl_bus_remove_devices(struct mei_device *dev)
{
struct mei_cl *cl, *next;
mutex_lock(&dev->device_lock);
list_for_each_entry_safe(cl, next, &dev->device_list, device_link) {
if (cl->device)
mei_cl_remove_device(cl->device);
list_del(&cl->device_link);
mei_cl_unlink(cl);
kfree(cl);
}
mutex_unlock(&dev->device_lock);
}
int __init mei_cl_bus_init(void)
{
return bus_register(&mei_cl_bus_type);

2
drivers/misc/mei/init.c
View File

@ -288,6 +288,8 @@ void mei_stop(struct mei_device *dev)
mei_nfc_host_exit(dev);
mei_cl_bus_remove_devices(dev);
mutex_lock(&dev->device_lock);
mei_wd_stop(dev);

1
drivers/misc/mei/mei_dev.h
View File

@ -296,6 +296,7 @@ int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length);
int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length);
int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
void mei_cl_bus_rx_event(struct mei_cl *cl);
void mei_cl_bus_remove_devices(struct mei_device *dev);
int mei_cl_bus_init(void);
void mei_cl_bus_exit(void);

10
drivers/misc/mei/nfc.c
View File

@ -552,13 +552,7 @@ err:
void mei_nfc_host_exit(struct mei_device *dev)
{
struct mei_nfc_dev *ndev = &nfc_dev;
cancel_work_sync(&ndev->init_work);
mutex_lock(&dev->device_lock);
if (ndev->cl && ndev->cl->device)
mei_cl_remove_device(ndev->cl->device);
mei_nfc_free(ndev);
mutex_unlock(&dev->device_lock);
}