In brcmf_fws_init() the error flows were not properly handled
and the caller ignored the return value. The only action that
is allowed to fail in brcmf_fws_init() is setting the tlv in
firmware as the feature is not supported on all devices.
Cc: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
Reviewed-by: Hante Meuleman <meuleman@xxxxxxxxxxxx>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@xxxxxxxxxxxx>
Signed-off-by: Arend van Spriel <arend@xxxxxxxxxxxx>
---
.../net/wireless/brcm80211/brcmfmac/dhd_linux.c | 5 +++-
drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c | 28 ++++++++++++++------
2 files changed, 24 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c
index a0afef2..59c2546 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c
@@ -899,7 +899,10 @@ int brcmf_bus_start(struct device *dev)
goto fail;
drvr->fw_signals = true;
- (void)brcmf_fws_init(drvr);
+ ret = brcmf_fws_init(drvr);
+ if (ret < 0)
+ goto fail;
+
brcmf_fws_add_interface(ifp);
drvr->config = brcmf_cfg80211_attach(drvr, bus_if->dev);
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
index b0591e3..f9153b1 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
@@ -1897,16 +1897,20 @@ int brcmf_fws_init(struct brcmf_pub *drvr)
BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE;
- rc = brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv);
+ rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
+ brcmf_fws_notify_credit_map);
if (rc < 0) {
- brcmf_err("failed to set bdcv2 tlv signaling\n");
+ brcmf_err("register credit map handler failed\n");
goto fail;
}
- if (brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
- brcmf_fws_notify_credit_map)) {
- brcmf_err("register credit map handler failed\n");
- goto fail;
+ /* setting the iovar may fail if feature is unsupported
+ * so leave the rc as is so driver initialization can
+ * continue.
+ */
+ if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) {
+ brcmf_err("failed to set bdcv2 tlv signaling\n");
+ goto fail_event;
}
brcmf_fws_hanger_init(&drvr->fws->hanger);
@@ -1922,9 +1926,9 @@ int brcmf_fws_init(struct brcmf_pub *drvr)
drvr->fw_signals ? "enabled" : "disabled", tlv);
return 0;
+fail_event:
+ brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
fail:
- /* disable flow control entirely */
- drvr->fw_signals = false;
brcmf_fws_deinit(drvr);
return rc;
}
@@ -1937,6 +1941,14 @@ void brcmf_fws_deinit(struct brcmf_pub *drvr)
if (!fws)
return;
+ /* disable firmware signalling entirely
+ * to avoid using the workqueue.
+ */
+ drvr->fw_signals = false;
+
+ if (drvr->fws->fws_wq)
+ destroy_workqueue(drvr->fws->fws_wq);
+
/* cleanup */
brcmf_fws_lock(drvr, flags);
brcmf_fws_cleanup(fws, -1);
--
1.7.10.4
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