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qcacmn: Fix DFS kernel panic

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Analysis:
dfs_nol_timer_cleanup() calls dfs_nol_update(), which internally
calls a legacy function to update the scan channel list and sends
a WMI command to FW. However, from WIN side dfs_nol_timer_cleanup()
is also called after target stop, which leads to a kernel panic.

Solution:
Call dfs_nol_update() prior to target stop.

Initalize precac channel list during dfs reset.

Change-Id: If856d436ad215efa46cfc166d95bf3ccb4e7bf99
CRs-Fixed: 2096256
This commit is contained in:
Shashikala Prabhu
2017-08-19 12:20:17 +05:30
committed by snandini
parent 33d5173722
commit c2fc6d09c6
3 changed files with 3 additions and 2 deletions
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1
umac/dfs/core/src/misc/dfs.c
View File

@@ -331,7 +331,6 @@ int dfs_attach(struct wlan_dfs *dfs)
void dfs_stop(struct wlan_dfs *dfs) void dfs_stop(struct wlan_dfs *dfs)
{ {
dfs_init_precac_list(dfs);
dfs_nol_timer_cleanup(dfs); dfs_nol_timer_cleanup(dfs);
dfs_clear_nolhistory(dfs); dfs_clear_nolhistory(dfs);
} }

1
umac/dfs/core/src/misc/dfs_nol.c
View File

@@ -495,7 +495,6 @@ void dfs_nol_timer_cleanup(struct wlan_dfs *dfs)
} }
} }
dfs->dfs_nol = NULL; dfs->dfs_nol = NULL;
dfs_nol_update(dfs);
} }
int dfs_get_rn_use_nol(struct wlan_dfs *dfs) int dfs_get_rn_use_nol(struct wlan_dfs *dfs)

3
umac/dfs/dispatcher/src/wlan_dfs_utils_api.c
View File

@@ -46,6 +46,8 @@ QDF_STATUS utils_dfs_reset(struct wlan_objmgr_pdev *pdev)
return QDF_STATUS_E_FAILURE; return QDF_STATUS_E_FAILURE;
dfs_reset(dfs); dfs_reset(dfs);
dfs_nol_update(dfs);
dfs_init_precac_list(dfs);
return QDF_STATUS_SUCCESS; return QDF_STATUS_SUCCESS;
} }
@@ -662,6 +664,7 @@ void dfs_clear_nol_channels(struct wlan_objmgr_pdev *pdev)
/* clear local cache first */ /* clear local cache first */
dfs_nol_timer_cleanup(dfs); dfs_nol_timer_cleanup(dfs);
dfs_nol_update(dfs);
/* /*
* update platform driver nol list with local cache which is zero, * update platform driver nol list with local cache which is zero,