This series consists of three patches which are fixing existing behavior (meaning: it either affects PCIe or USB or both) in the rtw88 driver. We previously had discussed patches for these locking issues while working on SDIO support, but the problem never ocurred while testing USB cards. It turns out that these are still needed and I think that they also fix the same problems for USB users (it's not clear how often it happens there though) - and possibly even PCIe card users. The issue fixed by the second and third patches have been spotted by a user who tested rtw88 SDIO support. Everything is working fine for him but there are warnings [1] and [2] in the kernel log stating "Voluntary context switch within RCU read-side critical section!". The solution in the third and fourth patch was actually suggested by Ping-Ke in [3]. Thanks again! These fixes are indepdent of my other series adding SDIO support to the rtw88 driver, meaning they can be added to the wireless driver tree on top of Linux 6.2-rc1 or linux-next. Changes since v1 at [4]: - Keep the u8 bitfields in patch 1 but split the res2 field into res2_1 and res2_2 as suggested by Ping-Ke - Added Ping-Ke's reviewed-by to patches 2-4 - thank you! - Added a paragraph in the cover-letter to avoid confusion whether these patches depend on the rtw88 SDIO support series Changes since v2 at [5]: - Added Ping-Ke's Reviewed-by and Sascha's Tested-by (thanks to both of you!) - Dropped patch 1/4 "rtw88: Add packed attribute to the eFuse structs" This requires more discussion. I'll send a separate patch for this. - Updated cover letter title so it's clear that this is independent of SDIO support code [0] https://lore.kernel.org/linux-wireless/695c976e02ed44a2b2345a3ceb226fc4@xxxxxxxxxxx/ [1] https://github.com/LibreELEC/LibreELEC.tv/pull/7301#issuecomment-1366421445 [2] https://github.com/LibreELEC/LibreELEC.tv/pull/7301#issuecomment-1366610249 [3] https://lore.kernel.org/lkml/e0aa1ba4336ab130712e1fcb425e6fd0adca4145.camel@xxxxxxxxxxx/ [4] https://lore.kernel.org/linux-wireless/20221228133547.633797-1-martin.blumenstingl@xxxxxxxxxxxxxx/ [5] https://lore.kernel.org/linux-wireless/20221229124845.1155429-1-martin.blumenstingl@xxxxxxxxxxxxxx/ Martin Blumenstingl (3): wifi: rtw88: Move register access from rtw_bf_assoc() outside the RCU wifi: rtw88: Use rtw_iterate_vifs() for rtw_vif_watch_dog_iter() wifi: rtw88: Use non-atomic sta iterator in rtw_ra_mask_info_update() drivers/net/wireless/realtek/rtw88/bf.c | 13 +++++++------ drivers/net/wireless/realtek/rtw88/mac80211.c | 4 +++- drivers/net/wireless/realtek/rtw88/main.c | 6 ++++-- 3 files changed, 14 insertions(+), 9 deletions(-) -- 2.39.0
