| Message ID | 20210226142215.3482168-1-arnd@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] mt76: mt7915: fix unused 'mode' variable | expand |
+ linux-wireless Arnd Bergmann <arnd@kernel.org> writes: > From: Arnd Bergmann <arnd@arndb.de> > > clang points out a possible corner case in the mt7915_tm_set_tx_cont() > function if called with invalid arguments: > > drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:593:2: warning: variable 'mode' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized] > default: > ^~~~~~~ > drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:597:13: note: uninitialized use occurs here > rateval = mode << 6 | rate_idx; > ^~~~ > drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:506:37: note: initialize the variable 'mode' to silence this warning > u8 rate_idx = td->tx_rate_idx, mode; > ^ > > Change it to return an error instead of continuing with invalid data > here. > > Fixes: 3f0caa3cbf94 ("mt76: mt7915: add support for continuous tx in testmode") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > v2: remove the extra 'break;' after return. > --- > drivers/net/wireless/mediatek/mt76/mt7915/testmode.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) You forgot to Cc linux-wireless and hence patchwork didn't see this, so I applied this manually instead: c490492f15f6 mt76: mt7915: fix unused 'mode' variable
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/testmode.c b/drivers/net/wireless/mediatek/mt76/mt7915/testmode.c index 7fb2170a9561..bd798df748ba 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/testmode.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/testmode.c @@ -543,7 +543,7 @@ mt7915_tm_set_tx_cont(struct mt7915_phy *phy, bool en) tx_cont->bw = CMD_CBW_20MHZ; break; default: - break; + return -EINVAL; } if (!en) { @@ -591,7 +591,7 @@ mt7915_tm_set_tx_cont(struct mt7915_phy *phy, bool en) mode = MT_PHY_TYPE_HE_MU; break; default: - break; + return -EINVAL; } rateval = mode << 6 | rate_idx;