Hi, This patch set introduces usbnet_link_change() API and applies it on all usbnet drivers, then handle the link change centrally to stop bulk transfer when link becomes off and restart bulk transfer when link becomes on.
With the change, ~10% performance boost on bulk transfer of another device on the same bus can be obtained when link is off. Also, stopping bulk transfer when link becomes off may disable asynchonous schedule of host controller, power might be saved probabally. drivers/net/usb/asix_devices.c | 6 +----- drivers/net/usb/ax88179_178a.c | 12 ++++------- drivers/net/usb/cdc_ether.c | 5 +---- drivers/net/usb/cdc_ncm.c | 9 +++----- drivers/net/usb/dm9601.c | 7 +------ drivers/net/usb/mcs7830.c | 6 +----- drivers/net/usb/sierra_net.c | 3 +-- drivers/net/usb/usbnet.c | 45 +++++++++++++++++++++++++++++++++++++++- include/linux/usb/usbnet.h | 2 ++ 9 files changed, 58 insertions(+), 37 deletions(-) Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
