From: Alban Browaeys Date: Tue, 16 Aug 2016 07:18:04 +0000 (+0300) Subject: xhci: really enqueue zero length TRBs. X-Git-Tag: v4.14-rc1~2611^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0d2daaded82565f807a4435d678343f437b8b848;p=platform%2Fkernel%2Flinux-rpi.git xhci: really enqueue zero length TRBs. Enqueue the first TRB even if full_len is zero. Without this "adb install " freezes the system. Signed-off-by: Alban Browaeys Fixes: 86065c2719a5 ("xhci: don't rely on precalculated value of needed trbs in the enqueue loop") Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index fe5b70b..fd9fd12 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -3244,7 +3244,8 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, send_addr = addr; /* Queue the TRBs, even if they are zero-length */ - for (enqd_len = 0; enqd_len < full_len; enqd_len += trb_buff_len) { + for (enqd_len = 0; first_trb || enqd_len < full_len; + enqd_len += trb_buff_len) { field = TRB_TYPE(TRB_NORMAL); /* TRB buffer should not cross 64KB boundaries */