On Thu, Mar 16, 2017 at 09:08:40PM -0300, Mauro Carvalho Chehab wrote: > The dwc2 hardware doesn't like to do DMA transfers without > aligning data in DWORD. The driver also assumes that, even > when there's no DMA, at dwc2_read_packet(). > > That cause buffer overflows, preventing some drivers to work. Why aren't the drivers being fixed? This is a well-known (hopefully) restriction on USB data buffers, can't the uvc_driver be fixed? > In the specific case of uvc_driver, it uses an array where > it caches the content of video controls, passing it to the > USB stack via usb_control_msg(). Typical controls use 1 or 2 > bytes. The net result is that other values of the buffer > gets overriden when this function is called. Not good, it should be fixed, otherwise you are going to have to try to fix up all host controllers :( thanks, greg k-h -- 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
