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qcacmn: Harden NAPI event handler

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Make sure that NAPI event handler would handle events only
after it has been initialized. Check init flag before procesing
the event and emit a warning and return an error to the caller.

Change-Id: I9d2b84560ee2363ecf2a570dbef0275dfb87786a
CRs-Fixed: 1091678
This commit is contained in:
Orhan K AKYILDIZ
2016-11-29 19:30:04 -08:00
committed by Houston Hoffman
parent 93e24e385d
commit 0f521bf9be
1 changed files with 6 additions and 1 deletions
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7
hif/src/hif_napi.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2016 The Linux Foundation. All rights reserved.
* Copyright (c) 2015-2017 The Linux Foundation. All rights reserved.
*
* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
*
@@ -468,6 +468,11 @@ int hif_napi_event(struct hif_opaque_softc *hif_ctx, enum qca_napi_event event,
NAPI_DEBUG("%s: -->(event=%d, aux=%p)", __func__, event, data);
if ((napid->state & HIF_NAPI_INITED) == 0) {
NAPI_DEBUG("%s: got event when NAPI not initialized",
__func__);
return -EINVAL;
}
spin_lock_bh(&(napid->lock));
prev_state = napid->state;
switch (event) {