[CCing the regression list, as it should be in the loop for regressions: https://docs.kernel.org/admin-guide/reporting-regressions.html] On 31.03.23 14:59, Sascha Hauer wrote: > On Sun, Jan 08, 2023 at 10:13:22PM +0100, Martin Blumenstingl wrote: >> USB and (upcoming) SDIO support may sleep in the read/write handlers. >> Shrink the RCU critical section so it only cover the call to >> ieee80211_find_sta() and finding the ic_vht_cap/vht_cap based on the >> found station. This moves the chip's BFEE configuration outside the >> rcu_read_lock section and thus prevent "scheduling while atomic" or >> "Voluntary context switch within RCU read-side critical section!" >> warnings when accessing the registers using an SDIO card (which is >> where this issue has been spotted in the real world - but it also >> affects USB cards). > > Unfortunately this introduces a regression on my RTW8821CU chip. With > this it constantly looses connection to the AP and reconnects shortly > after: Thanks for the report. To be sure the issue doesn't fall through the cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression tracking bot: #regzbot ^introduced c7eca79def44 #regzbot title net: wifi: rtw88: RTW8821CU constantly looses connection to the AP and reconnects shortly after #regzbot ignore-activity This isn't a regression? This issue or a fix for it are already discussed somewhere else? It was fixed already? You want to clarify when the regression started to happen? Or point out I got the title or something else totally wrong? Then just reply and tell me -- ideally while also telling regzbot about it, as explained by the page listed in the footer of this mail. Developers: When fixing the issue, remember to add 'Link:' tags pointing to the report (the parent of this mail). See page linked in footer for details. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you.
