This change removes calls of uvc_function_connect()/uvc_function_disconnect() functions from open()/close() syscalls. This is a bugfix in g_webcam module, in some test scenarios (e.g. UDC in suspend mode or OTG in host mode) straightforward control of D+ pull-up might lead to system's misbehaviour. Most probably a root cause of some reported system freezes on g_webcam module probe [1] is related to the issue described above, for instance if udev's v4l_id helper opens a new V4L2 device node to query device capabilities. Alternatively to this chage checks may be added to UDC driver's .pullup functions, however presence of pullup controls from uvcvideo seems to be redundant. [1] http://kerneltrap.org/mailarchive/linux-usb/2010/12/29/6268355/thread Vladimir Zapolskiy (2): usb: gadget/uvc: remove connect/disconnect calls on open/release usb: gadget/uvc: remove connection/disconnection routines drivers/usb/gadget/f_uvc.c | 24 ------------------------ drivers/usb/gadget/uvc.h | 3 --- drivers/usb/gadget/uvc_v4l2.c | 5 ----- 3 files changed, 32 deletions(-) -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
