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| author |   Alban Browaeys <alban.browaeys@gmail.com> | 2016-08-16 10:18:04 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-16 09:42:47 +0200 |
| commit | 0d2daaded82565f807a4435d678343f437b8b848 (patch) | |
| tree | 3c3e62014f24134fe5a58ac9143bc6706f7641de /drivers/usb | |
| parent | xhci: always handle "Command Ring Stopped" events (diff) | |
| download | linux-dev-0d2daaded82565f807a4435d678343f437b8b848.tar.xz linux-dev-0d2daaded82565f807a4435d678343f437b8b848.zip | |
xhci: really enqueue zero length TRBs.
Enqueue the first TRB even if full_len is zero.
Without this "adb install <apk>" freezes the system.
Signed-off-by: Alban Browaeys <alban.browaeys@gmail.com>
Fixes: 86065c2719a5 ("xhci: don't rely on precalculated value of needed trbs in the enqueue loop")
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index fe5b70be61ba..fd9fd12e4861 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 */ |