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qcacld-3.0: cleanup scan queue in case of SSR

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When the SSR and interface down happen in parallel,
the driver rejects the interface down since the
recovery is in progress. Kernel ignores the -EAGAIN
request from the driver and as part of NET_DOWN notification
in cfg80211_netdown_notifer the kernel invokes the
___cfg80211_scan_done to free the request but dosen't not send
scan_result indication, since it expects the scan_done work to
get scheduled and then broadcast the request to upperlayer.

Change-Id: Id698044ebe30cf555300e909a916d74be1f8b94f
CRs-Fixed: 2115392
This commit is contained in:
Arunk Khandavalli 2017-12-07 10:18:50 +05:30 • committed by snandini
commit f0c0d76d72
3 changed files with 13 additions and 1 deletions
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5
core/hdd/src/wlan_hdd_driver_ops.c
View file

@ -1466,6 +1466,7 @@ static void wlan_hdd_set_the_pld_uevent(struct pld_uevent_data *uevent)
static void wlan_hdd_handle_the_pld_uevent(struct pld_uevent_data *uevent)
{
enum cds_driver_state driver_state;
struct hdd_context *hdd_ctx;
driver_state = cds_get_driver_state();
@ -1482,6 +1483,10 @@ static void wlan_hdd_handle_the_pld_uevent(struct pld_uevent_data *uevent)
case PLD_FW_DOWN:
qdf_complete_wait_events();
cds_set_target_ready(false);
hdd_ctx = cds_get_context(QDF_MODULE_ID_HDD);
if (hdd_ctx != NULL)
wlan_cfg80211_cleanup_scan_queue(
hdd_ctx->hdd_pdev);
break;
case PLD_FW_READY:
default:

7
core/hdd/src/wlan_hdd_main.c
View file

@ -552,6 +552,13 @@ static int __hdd_netdev_notifier_call(struct notifier_block *nb,
cds_flush_work(&adapter->scan_block_work);
hdd_debug("Scan is not Pending from user");
}
/*
* After NETDEV_GOING_DOWN, kernel calls hdd_stop.Irrespective
* of return status of hdd_stop call, kernel resets the IFF_UP
* flag after which driver does not send the cfg80211_scan_done.
* Ensure to cleanup the scan queue in NETDEV_GOING_DOWN
*/
wlan_cfg80211_cleanup_scan_queue(hdd_ctx->hdd_pdev);
break;
default:

2
core/hdd/src/wlan_hdd_power.c
View file

@ -82,6 +82,7 @@
#include "scheduler_api.h"
#include "cds_utils.h"
#include "wlan_hdd_packet_filter_api.h"
#include "wlan_cfg80211_scan.h"
/* Preprocessor definitions and constants */
#ifdef QCA_WIFI_NAPIER_EMULATION
@ -1272,7 +1273,6 @@ QDF_STATUS hdd_wlan_shutdown(void)
hdd_debug("Invoking packetdump deregistration API");
wlan_deregister_txrx_packetdump();
wlan_cfg80211_cleanup_scan_queue(hdd_ctx->hdd_pdev);
hdd_reset_all_adapters(hdd_ctx);
/* Flush cached rx frame queue */