svn commit: r354207 - head/sys/net

[Eric Joyner]

Author: erj
Date: Wed Oct 30 20:45:12 2019
New Revision: 354207
URL: https://svnweb.freebsd.org/changeset/base/354207

Log:
  iflib: cleanup memory leaks on driver detach
  
  From Jake:
  The iflib stack failed to release all of the memory allocated under
  M_IFLIB during device detach.
  
  Specifically, the ifmp_ring, the ift_ifdi Tx DMA info, and the ifr_ifdi Rx
  DMA info were not being released.
  
  Release this memory so that iflib won't leak memory when a device
  detaches.
  
  Since we're freeing the ift_ifdi pointer during iflib_txq_destroy we
  need to call this only after iflib_dma_free in iflib_tx_structures_free.
  
  Additionally, also ensure that we destroy the callout mutex associated
  with each Tx queue when we free it.
  
  Signed-off-by: Jacob Keller <jacob.e.keller at intel.com>
  
  Submitted by:	Jacob Keller <jacob.e.keller at intel.com>
  Reviewed by:	erj@, gallatin@
  MFC after:	1 week
  Sponsored by:	Intel Corporation
  Differential Revision:	https://reviews.freebsd.org/D22157

Modified:
  head/sys/net/iflib.c

Modified: head/sys/net/iflib.c
==============================================================================
--- head/sys/net/iflib.c	Wed Oct 30 20:43:27 2019	(r354206)
+++ head/sys/net/iflib.c	Wed Oct 30 20:45:12 2019	(r354207)
@@ -1725,6 +1725,14 @@ iflib_txq_destroy(iflib_txq_t txq)
 
 	for (int i = 0; i < txq->ift_size; i++)
 		iflib_txsd_destroy(ctx, txq, i);
+
+	if (txq->ift_br != NULL) {
+		ifmp_ring_free(txq->ift_br);
+		txq->ift_br = NULL;
+	}
+
+	mtx_destroy(&txq->ift_mtx);
+
 	if (txq->ift_sds.ifsd_map != NULL) {
 		free(txq->ift_sds.ifsd_map, M_IFLIB);
 		txq->ift_sds.ifsd_map = NULL;
@@ -1745,6 +1753,9 @@ iflib_txq_destroy(iflib_txq_t txq)
 		bus_dma_tag_destroy(txq->ift_tso_buf_tag);
 		txq->ift_tso_buf_tag = NULL;
 	}
+	if (txq->ift_ifdi != NULL) {
+		free(txq->ift_ifdi, M_IFLIB);
+	}
 }
 
 static void
@@ -2225,6 +2236,8 @@ iflib_rx_sds_free(iflib_rxq_t rxq)
 		}
 		free(rxq->ifr_fl, M_IFLIB);
 		rxq->ifr_fl = NULL;
+		free(rxq->ifr_ifdi, M_IFLIB);
+		rxq->ifr_ifdi = NULL;
 		rxq->ifr_cq_cidx = 0;
 	}
 }
@@ -5658,9 +5671,9 @@ iflib_tx_structures_free(if_ctx_t ctx)
 	int i, j;
 
 	for (i = 0; i < NTXQSETS(ctx); i++, txq++) {
-		iflib_txq_destroy(txq);
 		for (j = 0; j < sctx->isc_ntxqs; j++)
 			iflib_dma_free(&txq->ift_ifdi[j]);
+		iflib_txq_destroy(txq);
 	}
 	free(ctx->ifc_txqs, M_IFLIB);
 	ctx->ifc_txqs = NULL;