4.4-stable review patch. If anyone has any objections, please let me know.
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From: Shuah Khan (Samsung OSG) shuah@kernel.org
commit 1e180f167d4e413afccbbb4a421b48b2de832549 upstream.
Device is left in the busid_table after unbind and rebind. Rebind initiates usb bus scan and the original driver claims the device. After rescan the device should be deleted from the busid_table as it no longer belongs to usbip_host.
Fix it to delete the device after device_attach() succeeds.
Signed-off-by: Shuah Khan (Samsung OSG) shuah@kernel.org Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/usbip/stub_main.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/usb/usbip/stub_main.c +++ b/drivers/usb/usbip/stub_main.c @@ -201,6 +201,9 @@ static ssize_t rebind_store(struct devic if (!bid) return -ENODEV;
+ /* mark the device for deletion so probe ignores it during rescan */ + bid->status = STUB_BUSID_OTHER; + /* device_attach() callers should hold parent lock for USB */ if (bid->udev->dev.parent) device_lock(bid->udev->dev.parent); @@ -212,6 +215,9 @@ static ssize_t rebind_store(struct devic return ret; }
+ /* delete device from busid_table */ + del_match_busid((char *) buf); + return count; }