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We provide timeout value to rt2x00usb_vendor_request_buff() based on
number of registers to process. That value is passed down to
rt2x00usb_vendor_req_buff_lock() and ends in usb_control_msg(). But we
do not read/write all registers in rt2x00usb_vendor_req_buff_lock() at
once. We read/write them in chunks of 64 bytes in the loop, hence passed
timeout value to low level is too big.
Patch removes timeout argument from rt2x00usb_vendor_request_buff() and
use short REGISTER_TIMEOUT in rt2x00usb_vendor_req_buff_lock(). That
timeout value should be fine for 64 bytes and smaller requests. For
EEPROM read we introduced new timeout value equal to 2 seconds.
Patch fixes process uninterruptible sleep stalls for long period, when
USB bus has problem to satisfy a request and we wait very long time on
usb_start_wait_urb().
Reported-and-tested-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
e9dc51aa2b