Some latest QC based modems seem not to properly accept altsetting
toggling in cdc_ncm_bind_common, making them to fail. The workaround
was to introduce an empirically decided pause to avoid the failure.
This patch introduces a different approach: for MBIM devices, instead
of toggling interfaces, the MBIM class-specific request code
RESET_FUNCTION is used in order to reset the function to its initial
state, removing the need for the pause.
Patch has been tested with a few Telit QC and Intel based MBIM modems.
Patch has also been tested with an Intel NCM based device, for
regression checking.
Daniele Palmas (1):
NET: usb: cdc_ncm: adding MBIM RESET_FUNCTION request and modifying
ncm bind common code
drivers/net/usb/cdc_ncm.c | 39 +++++++++++++++++++++++++++------------
include/uapi/linux/usb/cdc.h | 1 +
2 files changed, 28 insertions(+), 12 deletions(-)
--
2.7.4
