From: Juliana Rodrigueiro <juliana.rodrigue...@intra2net.com> Date: Wed, 31 Jul 2019 15:17:23 +0200
> Since linux 4.9 it is not possible to use buffers on the stack for DMA > transfers. > > During usb probe the driver crashes with "transfer buffer is on stack" > message. > > This fix k-allocates a buffer to be used on "read_reg_atomic", which is a > macro > that calls "usb_control_msg" under the hood. > > Kernel 4.19 backtrace: ... > Signed-off-by: Juliana Rodrigueiro <juliana.rodrigue...@intra2net.com> Applied.
