usbmon: correct length for isochronous
Usually the usbmon returns the amount of data specified in urb->transfer_buffer_length for output submissions and urb->actual_length for input callbacks. However, for Isochronous input transfers, this is not enough, since the returned data buffer may contain "holes". One easy way to fix this is to use urb->transfer_buffer_length, but this often transfers a whole lot of unused data, so we find how much was actually used instead. Original patch by Márton Németh. See also kernel bug 22182. Signed-off-by: NPete Zaitcev <zaitcev@redhat.com> Signed-off-by: NMárton Németh <nm127@freemail.hu> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Showing
想要评论请 注册 或 登录