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rtlwifi: rtl8192cu: Remove uninitialized_var() usage

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Using uninitialized_var() is dangerous as it papers over real bugs[1]
(or can in the future), and suppresses unrelated compiler warnings (e.g.
"unused variable"). If the compiler thinks it is uninitialized, either
simply initialize the variable or make compiler changes. As a precursor
to removing[2] this[3] macro[4], just initialize this variable to NULL,
and avoid sending garbage by returning.

[1] https://lore.kernel.org/lkml/20200603174714.192027-1-glider@google.com/
[2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@mail.gmail.com/
[3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@mail.gmail.com/
[4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/

Fixes: dc0313f466 ("rtlwifi: rtl8192cu: Add routine hw")
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2020-06-03 13:28:45 -07:00
parent e909ec1018
commit b898ef6d15
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/realtek/rtlwifi/rtl8192cu/hw.c
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@ -592,7 +592,7 @@ static void _rtl92cu_init_chipn_one_out_ep_priority(struct ieee80211_hw *hw,
bool wmm_enable,
u8 queue_sel)
{
u16 uninitialized_var(value);
u16 value;
switch (queue_sel) {
case TX_SELE_HQ:
@ -606,7 +606,7 @@ static void _rtl92cu_init_chipn_one_out_ep_priority(struct ieee80211_hw *hw,
break;
default:
WARN_ON(1); /* Shall not reach here! */
break;
return;
}
_rtl92c_init_chipn_reg_priority(hw, value, value, value, value,
value, value);