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ath6kl: Store scan request info in-advance before sending SCAN request

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In current code, Scan request info is recorded in vif->scan_req
after sending SCAN request to the firmware in ath6kl_cfg80211_scan().

In some corner cases, firmware sends SCAN_COMPLETE event immediately
when it receives SCAN request, which internally executes scan
complete event handler ath6kl_cfg80211_scan_complete_event() first.
So, Scan completion handler will a get a chance to executed even
before storing scan request info in ath6kl_cfg80211_scan().

Scan completion handler never report SCAN_COMPLETE event to
cfg80211 if scan request info(vif->scan_req) is NULL. This leads
to scan failure issue ("Device or resource busy error") during
next SCAN request from the user space. This patch ensures that scan
request info is stored before sending SCAN request.

Signed-off-by: Raja Mani <rmani@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Raja Mani 2012-03-28 18:50:35 +05:30 committed by Kalle Valo
parent 9cbee35868
commit 5b35dff0bb
1 changed files with 5 additions and 3 deletions
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8
drivers/net/wireless/ath/ath6kl/cfg80211.c
View File

@ -941,6 +941,8 @@ static int ath6kl_cfg80211_scan(struct wiphy *wiphy, struct net_device *ndev,
if (test_bit(CONNECTED, &vif->flags)) if (test_bit(CONNECTED, &vif->flags))
force_fg_scan = 1; force_fg_scan = 1;
vif->scan_req = request;
if (test_bit(ATH6KL_FW_CAPABILITY_STA_P2PDEV_DUPLEX, if (test_bit(ATH6KL_FW_CAPABILITY_STA_P2PDEV_DUPLEX,
ar->fw_capabilities)) { ar->fw_capabilities)) {
/* /*
@ -963,10 +965,10 @@ static int ath6kl_cfg80211_scan(struct wiphy *wiphy, struct net_device *ndev,
ATH6KL_FG_SCAN_INTERVAL, ATH6KL_FG_SCAN_INTERVAL,
n_channels, channels); n_channels, channels);
} }
if (ret) if (ret) {
ath6kl_err("wmi_startscan_cmd failed\n"); ath6kl_err("wmi_startscan_cmd failed\n");
else vif->scan_req = NULL;
vif->scan_req = request; }
kfree(channels); kfree(channels);