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Fix up a race condition with the callout_stop method in newstate.

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The call should happen with the driver lock held. We don't hold the driver
lock in newstate as it's a separate thread where we can't sleep (and we only
call wpi_cmd in async mode).

Discovered By: Attillo's callout rework
Approved By: mlaier (comentor)
This commit is contained in:
Benjamin Close 2007-11-27 09:09:09 +00:00
parent a7099588fc
commit 8b92cdc94c
1 changed files with 4 additions and 1 deletions
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5
sys/dev/wpi/if_wpi.c
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@ -16,7 +16,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define VERSION "20071102"
#define VERSION "20071127"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
@ -1331,8 +1331,11 @@ wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
struct wpi_softc *sc = ifp->if_softc;
struct ieee80211_node *ni;
int error;
WPI_LOCK_DECL;
WPI_LOCK(sc);
callout_stop(&sc->calib_to);
WPI_UNLOCK(sc);
switch (nstate) {
case IEEE80211_S_SCAN: