Staging: rt2860sta: prevent a panic when disabling when associated
This fixes a panic which is triggered when the hardware "disappears" from
beneath the driver, i.e. when wireless is toggled off via Fn-F2 on various
EeePC models.
Ref. bug report http://bugzilla.kernel.org/show_bug.cgi?id=13390
panic http://bugzilla.kernel.org/attachment.cgi?id=21928
Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/rt2860/common/cmm_data_2860.c b/drivers/staging/rt2860/common/cmm_data_2860.c
index fb17355..857ff45 100644
--- a/drivers/staging/rt2860/common/cmm_data_2860.c
+++ b/drivers/staging/rt2860/common/cmm_data_2860.c
@@ -363,6 +363,8 @@
ULONG SwIdx = pAd->MgmtRing.TxCpuIdx;
pTxD = (PTXD_STRUC) pAd->MgmtRing.Cell[SwIdx].AllocVa;
+ if (!pTxD)
+ return 0;
pAd->MgmtRing.Cell[SwIdx].pNdisPacket = pPacket;
pAd->MgmtRing.Cell[SwIdx].pNextNdisPacket = NULL;