diff options
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 2c255d0620b0..167dae117f73 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -2103,7 +2103,7 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td, break; xhci_dbg(xhci, "TRB error %u, halted endpoint index = %u\n", trb_comp_code, ep_index); - /* else fall through */ + fallthrough; case COMP_STALL_ERROR: /* Did we transfer part of the data (middle) phase? */ if (trb_type == TRB_DATA || trb_type == TRB_NORMAL) @@ -3736,6 +3736,24 @@ static int xhci_get_isoc_frame_id(struct xhci_hcd *xhci, return start_frame; } +/* Check if we should generate event interrupt for a TD in an isoc URB */ +static bool trb_block_event_intr(struct xhci_hcd *xhci, int num_tds, int i) +{ + if (xhci->hci_version < 0x100) + return false; + /* always generate an event interrupt for the last TD */ + if (i == num_tds - 1) + return false; + /* + * If AVOID_BEI is set the host handles full event rings poorly, + * generate an event at least every 8th TD to clear the event ring + */ + if (i && xhci->quirks & XHCI_AVOID_BEI) + return !!(i % 8); + + return true; +} + /* This is for isoc transfer */ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb, int slot_id, unsigned int ep_index) @@ -3843,10 +3861,7 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags, more_trbs_coming = false; td->last_trb = ep_ring->enqueue; field |= TRB_IOC; - /* set BEI, except for the last TD */ - if (xhci->hci_version >= 0x100 && - !(xhci->quirks & XHCI_AVOID_BEI) && - i < num_tds - 1) + if (trb_block_event_intr(xhci, num_tds, i)) field |= TRB_BEI; } /* Calculate TRB length */ |