On 12.08.2016 19:45, Alban Browaeys wrote:
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@xxxxxxxxx>
Fixes: 86065c2719a5 ("xhci: don't rely on precalculated value of needed trbs in the enqueue loop")
---
drivers/usb/host/xhci-ring.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 918e0c739b79..ecefc0e9a037 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -3243,7 +3243,8 @@ 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 */
Nice catch, thanks, I'll send it forward
-Mathias
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