Author: adrian
Date: Sun Mar 15 20:15:10 2015
New Revision: 280055
URL: https://svnweb.freebsd.org/changeset/base/280055
Log:
Fix races between wpi_rx_done() and wpi_stop()
PR: kern/197143
Submitted by: Andriy Voskoboinyk <s3er...@gmail.com>
Modified:
head/sys/dev/wpi/if_wpi.c
Modified: head/sys/dev/wpi/if_wpi.c
==============================================================================
--- head/sys/dev/wpi/if_wpi.c Sun Mar 15 20:13:58 2015 (r280054)
+++ head/sys/dev/wpi/if_wpi.c Sun Mar 15 20:15:10 2015 (r280055)
@@ -1952,6 +1952,12 @@ wpi_notif_intr(struct wpi_softc *sc)
case WPI_RX_DONE:
/* An 802.11 frame has been received. */
wpi_rx_done(sc, desc, data);
+
+ if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
+ /* wpi_stop() was called. */
+ return;
+ }
+
break;
case WPI_TX_DONE:
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