diff options
| -rw-r--r-- | CORE/SERVICES/HIF/PCIe/copy_engine.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/CORE/SERVICES/HIF/PCIe/copy_engine.c b/CORE/SERVICES/HIF/PCIe/copy_engine.c index 243e84824563..78995a7a3cc3 100644 --- a/CORE/SERVICES/HIF/PCIe/copy_engine.c +++ b/CORE/SERVICES/HIF/PCIe/copy_engine.c @@ -842,6 +842,17 @@ CE_per_engine_servicereap(struct hif_pci_softc *sc, unsigned int CE_id) } #endif /*ATH_11AC_TXCOMPACT*/ + +/* + * Number of times to check for any pending tx/rx completion on + * a copy engine, this count should be big enough. Once we hit + * this threashold we'll not check for any Tx/Rx comlpetion in same + * interrupt handling. Note that this threashold is only used for + * Rx interrupt processing, this can be used tor Tx as well if we + * suspect any infinite loop in checking for pending Tx completion. + */ +#define CE_TXRX_COMP_CHECK_THRESHOLD 20 + /* * Guts of interrupt handler for per-engine interrupts on a particular CE. * @@ -861,6 +872,7 @@ CE_per_engine_service(struct hif_pci_softc *sc, unsigned int CE_id) unsigned int id; unsigned int flags; u_int32_t CE_int_status; + unsigned int more_comp_cnt = 0; A_TARGET_ACCESS_BEGIN(targid); @@ -966,7 +978,15 @@ more_watermarks: * we find no more events to process. */ if (CE_state->recv_cb && CE_recv_entries_done_nolock(sc, CE_state)) { - goto more_completions; + if (more_comp_cnt++ < CE_TXRX_COMP_CHECK_THRESHOLD) { + goto more_completions; + } else { + adf_os_print("%s:Potential infinite loop detected during Rx processing" + "nentries_mask:0x%x sw read_idx:0x%x hw read_idx:0x%x\n", + __func__, CE_state->dest_ring->nentries_mask, + CE_state->dest_ring->sw_index, + CE_DEST_RING_READ_IDX_GET(targid, CE_state->ctrl_addr)); + } } if (CE_state->send_cb && CE_send_entries_done_nolock(sc, CE_state)) { |