| Message ID | tencent_03969636CA4BC874A7763F66D23D15366009@qq.com (mailing list archive) |
|---|---|
| State | Awaiting Upstream |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | wifi: plfxlc: remove assert for mac->lock | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Not a local patch |
Edward Adam Davis <eadavis@qq.com> writes: > syzbot report WARNING in plfxlc_mac_release, according to the context, > there is not need assert for mac->lock. The commit message should explain _why_ the assert is not needed. Otherwise it looks that you are randomly removing it to get rid of the warning.
On Tue, 30 Jul 2024 13:35:07 +0300, Kalle Valo wrote: > > syzbot report WARNING in plfxlc_mac_release, according to the context, > > there is not need assert for mac->lock. > > The commit message should explain _why_ the assert is not needed. > Otherwise it looks that you are randomly removing it to get rid of the > warning. mac->lock is used to protect mac data, but after calling plfxlc_mac_release(), there are two functions:ieee80211_unregister_hw() and ieee80211_free_hw(), there is no action to operate on mac data in these two functions, so mac->lock is not required. On the other hand, there is no holding action for mac->lock before calling plfxlc_mac_release. -- Edward
diff --git a/drivers/net/wireless/purelifi/plfxlc/mac.c b/drivers/net/wireless/purelifi/plfxlc/mac.c index 641f847d47ab..f603fddead90 100644 --- a/drivers/net/wireless/purelifi/plfxlc/mac.c +++ b/drivers/net/wireless/purelifi/plfxlc/mac.c @@ -102,7 +102,6 @@ int plfxlc_mac_init_hw(struct ieee80211_hw *hw) void plfxlc_mac_release(struct plfxlc_mac *mac) { plfxlc_chip_release(&mac->chip); - lockdep_assert_held(&mac->lock); } int plfxlc_op_start(struct ieee80211_hw *hw)
syzbot report WARNING in plfxlc_mac_release, according to the context, there is not need assert for mac->lock. Fixes: 68d57a07bfe5 ("wireless: add plfxlc driver for pureLiFi X, XL, XC devices") Reported-and-tested-by: syzbot+51a42f7c2e399392ea82@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=51a42f7c2e399392ea82 Signed-off-by: Edward Adam Davis <eadavis@qq.com> --- drivers/net/wireless/purelifi/plfxlc/mac.c | 1 - 1 file changed, 1 deletion(-)