Johan/Greg,
Since CUPS uses libusb to communicate with printers these days (well, for over a decade now) so that printing and scanning can coexist, the usblp driver really doesn't get any usage anymore.
On Jan 4, 2021, at 10:11 AM, Johan Hovold johan@kernel.org wrote:
On Mon, Jan 04, 2021 at 03:59:02PM +0100, Greg Kroah-Hartman wrote:
On Mon, Jan 04, 2021 at 03:53:02PM +0100, Johan Hovold wrote:
Stack-allocated buffers cannot be used for DMA (on all architectures).
Replace the HP-channel macro with a helper function that allocates a dedicated transfer buffer so that it can continue to be used with arguments from the stack.
Wow, no one uses this driver anymore it seems, this should have triggered a runtime warning on newer kernels :(
This helper is only used by the IOCNR_HP_SET_CHANNEL ioctl so perhaps it's just that one which isn't used much.
Johan
________________________ Michael Sweet