Greg, On Sun, May 20, 2018 at 03:19:46PM +0200, Greg Kroah-Hartman wrote: > It's amazing that this driver ever worked, but now that x86 doesn't > allow USB data to be sent off of the stack, it really does not work at > all. Fix this up by properly allocating the data for the small > "commands" that get sent to the device off of the stack. > > We do this for one command by having a whole urb just for ack messages, > as they can be submitted in interrupt context, so we can not use > usb_bulk_msg(). But the poweron command can sleep (and does), so use > usb_bulk_msg() for that transfer. > > Reported-by: Carlos Manuel Santos <cmmpsantos@xxxxxxxxx> > Cc: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx> > Cc: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx> > Cc: stable <stable@xxxxxxxxxxxxxxx> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > --- > v4: don't use urb transfer buffer flags as the memory is tied to the urb > (thanks to Johan) Now we have a new static urb, and we use > usb_bulk_msg() for the other message. > v3: actually use the correct buffer (thanks to Arend van Spriel) > use kmemdup (thanks to Johannes Berg and Julia Lawall) > v2: set the urb flags correctly > > drivers/nfc/pn533/usb.c | 42 ++++++++++++++++++++++++++++++------------ > 1 file changed, 30 insertions(+), 12 deletions(-) I can take that one through nfc-next, and the few subsequent patches from Hans and Julia. Please let me know what's more convenient for you. Cheers, Samuel. -- 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
