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staging: rtl8723bs: Fix possible usage of NULL pointer in core/rtw_debug.c
Smatch reports the following: CHECK drivers/staging/rtl8723bs/core/rtw_debug.c drivers/staging/rtl8723bs/core/rtw_debug.c:454 proc_get_survey_info() error: we previously assumed 'phead' could be null (see line 453) drivers/staging/rtl8723bs/core/rtw_debug.c:455 proc_get_survey_info() warn: variable dereferenced before check 'phead' (see line 454) In the code, there are two successive calls to get_head(). The second is removed. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -451,7 +451,6 @@ int proc_get_survey_info(struct seq_file *m, void *v)
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spin_lock_bh(&(pmlmepriv->scanned_queue.lock));
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spin_lock_bh(&(pmlmepriv->scanned_queue.lock));
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phead = get_list_head(queue);
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phead = get_list_head(queue);
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plist = phead ? get_next(phead) : NULL;
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plist = phead ? get_next(phead) : NULL;
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plist = get_next(phead);
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if ((!phead) || (!plist)) {
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if ((!phead) || (!plist)) {
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spin_unlock_bh(&(pmlmepriv->scanned_queue.lock));
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spin_unlock_bh(&(pmlmepriv->scanned_queue.lock));
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return 0;
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return 0;
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