* [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace()
@ 2021-08-23 22:20 Nathan Chancellor
2021-08-24 1:45 ` Pkshih
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Nathan Chancellor @ 2021-08-23 22:20 UTC (permalink / raw)
To: Ping-Ke Shih, Kalle Valo
Cc: Colin Ian King, linux-wireless, netdev, linux-kernel,
clang-built-linux, llvm, Nathan Chancellor
Clang warns:
drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:6: warning:
variable 'place' is used uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]
if (chnl > 14) {
^~~~~~~~~
drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:909:9: note:
uninitialized use occurs here
return place;
^~~~~
drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:2: note: remove
the 'if' if its condition is always true
if (chnl > 14) {
^~~~~~~~~~~~~~~
drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:899:10: note:
initialize the variable 'place' to silence this warning
u8 place;
^
= '\0'
1 warning generated.
Commit 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable
initializations") removed the initialization of place but it appears
that this removal was in the wrong function.
_rtl92c_phy_get_rightchnlplace() returns place's value at the end of the
function so now if the if statement is false, place never gets
initialized. Add that initialization back to address the warning.
place's initialization is not necessary in
rtl92d_get_rightchnlplace_for_iqk() as place is only used within the if
statement so it can be removed, which is likely what was intended in the
first place.
Fixes: 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable initializations")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
index 8ae69d914312..9b83c710c9b8 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
@@ -896,7 +896,7 @@ static void _rtl92d_ccxpower_index_check(struct ieee80211_hw *hw,
static u8 _rtl92c_phy_get_rightchnlplace(u8 chnl)
{
- u8 place;
+ u8 place = chnl;
if (chnl > 14) {
for (place = 14; place < sizeof(channel5g); place++) {
@@ -1363,7 +1363,7 @@ static void _rtl92d_phy_switch_rf_setting(struct ieee80211_hw *hw, u8 channel)
u8 rtl92d_get_rightchnlplace_for_iqk(u8 chnl)
{
- u8 place = chnl;
+ u8 place;
if (chnl > 14) {
for (place = 14; place < sizeof(channel_all); place++) {
base-commit: 609c1308fbc6446fd6d8fec42b80e157768a5362
--
2.33.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* RE: [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace()
2021-08-23 22:20 [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace() Nathan Chancellor
@ 2021-08-24 1:45 ` Pkshih
2021-08-26 2:36 ` Kees Cook
2021-08-29 7:28 ` Kalle Valo
2 siblings, 0 replies; 4+ messages in thread
From: Pkshih @ 2021-08-24 1:45 UTC (permalink / raw)
To: Nathan Chancellor, Kalle Valo
Cc: Colin Ian King, linux-wireless, netdev, linux-kernel,
clang-built-linux, llvm
> -----Original Message-----
> From: Nathan Chancellor [mailto:nathan@kernel.org]
> Sent: Tuesday, August 24, 2021 6:20 AM
> To: Pkshih; Kalle Valo
> Cc: Colin Ian King; linux-wireless@vger.kernel.org; netdev@vger.kernel.org;
> linux-kernel@vger.kernel.org; clang-built-linux@googlegroups.com; llvm@lists.linux.dev; Nathan
> Chancellor
> Subject: [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace()
>
> Clang warns:
>
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:6: warning:
> variable 'place' is used uninitialized whenever 'if' condition is false
> [-Wsometimes-uninitialized]
> if (chnl > 14) {
> ^~~~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:909:9: note:
> uninitialized use occurs here
> return place;
> ^~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:2: note: remove
> the 'if' if its condition is always true
> if (chnl > 14) {
> ^~~~~~~~~~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:899:10: note:
> initialize the variable 'place' to silence this warning
> u8 place;
> ^
> = '\0'
> 1 warning generated.
>
> Commit 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable
> initializations") removed the initialization of place but it appears
> that this removal was in the wrong function.
Somehow, I also look into wrong function.
Thanks for the catch.
>
> _rtl92c_phy_get_rightchnlplace() returns place's value at the end of the
> function so now if the if statement is false, place never gets
> initialized. Add that initialization back to address the warning.
>
> place's initialization is not necessary in
> rtl92d_get_rightchnlplace_for_iqk() as place is only used within the if
> statement so it can be removed, which is likely what was intended in the
> first place.
>
> Fixes: 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable initializations")
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
> ---
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> index 8ae69d914312..9b83c710c9b8 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> @@ -896,7 +896,7 @@ static void _rtl92d_ccxpower_index_check(struct ieee80211_hw *hw,
>
> static u8 _rtl92c_phy_get_rightchnlplace(u8 chnl)
> {
> - u8 place;
> + u8 place = chnl;
>
> if (chnl > 14) {
> for (place = 14; place < sizeof(channel5g); place++) {
> @@ -1363,7 +1363,7 @@ static void _rtl92d_phy_switch_rf_setting(struct ieee80211_hw *hw, u8 channel)
>
> u8 rtl92d_get_rightchnlplace_for_iqk(u8 chnl)
> {
> - u8 place = chnl;
> + u8 place;
>
> if (chnl > 14) {
> for (place = 14; place < sizeof(channel_all); place++) {
>
> base-commit: 609c1308fbc6446fd6d8fec42b80e157768a5362
> --
> 2.33.0
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace()
2021-08-23 22:20 [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace() Nathan Chancellor
2021-08-24 1:45 ` Pkshih
@ 2021-08-26 2:36 ` Kees Cook
2021-08-29 7:28 ` Kalle Valo
2 siblings, 0 replies; 4+ messages in thread
From: Kees Cook @ 2021-08-26 2:36 UTC (permalink / raw)
To: Nathan Chancellor
Cc: Ping-Ke Shih, Kalle Valo, Colin Ian King, linux-wireless, netdev,
linux-kernel, clang-built-linux, llvm
On Mon, Aug 23, 2021 at 03:20:14PM -0700, Nathan Chancellor wrote:
> Clang warns:
>
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:6: warning:
> variable 'place' is used uninitialized whenever 'if' condition is false
> [-Wsometimes-uninitialized]
> if (chnl > 14) {
> ^~~~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:909:9: note:
> uninitialized use occurs here
> return place;
> ^~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:2: note: remove
> the 'if' if its condition is always true
> if (chnl > 14) {
> ^~~~~~~~~~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:899:10: note:
> initialize the variable 'place' to silence this warning
> u8 place;
> ^
> = '\0'
> 1 warning generated.
>
> Commit 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable
> initializations") removed the initialization of place but it appears
> that this removal was in the wrong function.
>
> _rtl92c_phy_get_rightchnlplace() returns place's value at the end of the
> function so now if the if statement is false, place never gets
> initialized. Add that initialization back to address the warning.
>
> place's initialization is not necessary in
> rtl92d_get_rightchnlplace_for_iqk() as place is only used within the if
> statement so it can be removed, which is likely what was intended in the
> first place.
>
> Fixes: 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable initializations")
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Thanks, I tripped over this too.
Reviewed-by: Kees Cook <keescook@chromium.org>
-Kees
> ---
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> index 8ae69d914312..9b83c710c9b8 100644
> --- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> +++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c
> @@ -896,7 +896,7 @@ static void _rtl92d_ccxpower_index_check(struct ieee80211_hw *hw,
>
> static u8 _rtl92c_phy_get_rightchnlplace(u8 chnl)
> {
> - u8 place;
> + u8 place = chnl;
>
> if (chnl > 14) {
> for (place = 14; place < sizeof(channel5g); place++) {
> @@ -1363,7 +1363,7 @@ static void _rtl92d_phy_switch_rf_setting(struct ieee80211_hw *hw, u8 channel)
>
> u8 rtl92d_get_rightchnlplace_for_iqk(u8 chnl)
> {
> - u8 place = chnl;
> + u8 place;
>
> if (chnl > 14) {
> for (place = 14; place < sizeof(channel_all); place++) {
>
> base-commit: 609c1308fbc6446fd6d8fec42b80e157768a5362
> --
> 2.33.0
>
--
Kees Cook
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace()
2021-08-23 22:20 [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace() Nathan Chancellor
2021-08-24 1:45 ` Pkshih
2021-08-26 2:36 ` Kees Cook
@ 2021-08-29 7:28 ` Kalle Valo
2 siblings, 0 replies; 4+ messages in thread
From: Kalle Valo @ 2021-08-29 7:28 UTC (permalink / raw)
To: Nathan Chancellor
Cc: Ping-Ke Shih, Colin Ian King, linux-wireless, netdev,
linux-kernel, clang-built-linux, llvm, Nathan Chancellor
Nathan Chancellor <nathan@kernel.org> wrote:
> Clang warns:
>
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:6: warning:
> variable 'place' is used uninitialized whenever 'if' condition is false
> [-Wsometimes-uninitialized]
> if (chnl > 14) {
> ^~~~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:909:9: note:
> uninitialized use occurs here
> return place;
> ^~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:901:2: note: remove
> the 'if' if its condition is always true
> if (chnl > 14) {
> ^~~~~~~~~~~~~~~
> drivers/net/wireless/realtek/rtlwifi/rtl8192de/phy.c:899:10: note:
> initialize the variable 'place' to silence this warning
> u8 place;
> ^
> = '\0'
> 1 warning generated.
>
> Commit 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable
> initializations") removed the initialization of place but it appears
> that this removal was in the wrong function.
>
> _rtl92c_phy_get_rightchnlplace() returns place's value at the end of the
> function so now if the if statement is false, place never gets
> initialized. Add that initialization back to address the warning.
>
> place's initialization is not necessary in
> rtl92d_get_rightchnlplace_for_iqk() as place is only used within the if
> statement so it can be removed, which is likely what was intended in the
> first place.
>
> Fixes: 369956ae5720 ("rtlwifi: rtl8192de: Remove redundant variable initializations")
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> Acked-by: Ping-Ke Shih <pkshih@realtek.com>
> Reviewed-by: Kees Cook <keescook@chromium.org>
Patch applied to wireless-drivers-next.git, thanks.
533ccdae76fa rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace()
--
https://patchwork.kernel.org/project/linux-wireless/patch/20210823222014.764557-1-nathan@kernel.org/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-08-29 7:28 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-23 22:20 [PATCH] rtlwifi: rtl8192de: Fix initialization of place in _rtl92c_phy_get_rightchnlplace() Nathan Chancellor
2021-08-24 1:45 ` Pkshih
2021-08-26 2:36 ` Kees Cook
2021-08-29 7:28 ` Kalle Valo
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).