On Sun 2020-11-29 17:46:09, Pali Rohár wrote: > This patch fixes configuring FIFO for one-directional endpoints which have > either RX or TX queue and therefore only one FIFO. > > Without this patch if FIFO size was zero then idx was incorrectly > calculated (expr. ffs(0)-1 is not zero) and size overflowed in fifosz > register. This register uses has only 4 bits for FIFO size. > > This patch is fixing it by setting zero size and zero address when > particular endpoint does not use FIFO. > > This issue caused loose of packets on USB bus in both directions and > basically usbtty was unusable. > > Signed-off-by: Pali Rohár <p...@kernel.org>
Reviewed-by: Pavel Machek <pa...@ucw.cz> -- http://www.livejournal.com/~pavelmachek
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