Duoming Zhou ffc9cab724 drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop() ... [ Upstream commit 806c7b5341 ] There is a deadlock in ieee80211_beacons_stop(), which is shown below: (Thread 1) | (Thread 2) | ieee80211_send_beacon() ieee80211_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | ieee80211_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ... We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, ieee80211_beacons_stop() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock. Signed-off-by: Duoming Zhou <duoming@zju.edu.cn> Link: https://lore.kernel.org/r/20220417135407.109536-1-duoming@zju.edu.cn Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-14 18:41:34 +02:00
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ieee80211	drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()	2022-06-14 18:41:34 +02:00
Kconfig	staging: rtl819x: select CONFIG_CRC32	2021-01-05 15:27:22 +01:00
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r819xU_cmdpkt.c	staging: r819xU_cmdpkt: Remove functionless method 'cmpk_handle_query_config_rx'	2021-05-10 11:19:23 +02:00
r819xU_cmdpkt.h	…
r819xU_firmware.c	…
r819xU_firmware.h	…
r819xU_firmware_img.c	…
r819xU_firmware_img.h	…
r819xU_phy.c	staging/rtl8192u: Prefer kcalloc over open coded arithmetic	2021-08-26 12:14:27 +02:00
r819xU_phy.h	…
r819xU_phyreg.h	…
r8180_93cx6.c	…
r8180_93cx6.h	…
r8190_rtl8256.c	staging: rtl8192u: remove unnecessary return in r8190_rtl8256.c	2021-03-10 09:25:26 +01:00
r8190_rtl8256.h	…
r8192U.h	staging: rtl: use eth_hw_addr_set()	2021-10-20 19:33:59 +02:00
r8192U_core.c	staging: rtl8192u: make array queuetopipe static const	2021-12-03 15:08:50 +01:00
r8192U_dm.c	staging: rtl8192u: Fixed warnings of coding style	2021-05-27 13:01:04 +02:00
r8192U_dm.h	…
r8192U_hw.h	staging: rtl8192u: fix spaces in r8192U_hw.h	2021-06-03 15:59:18 +02:00
r8192U_wx.c	r8192U_wx.c: style: avoid multiple blank lines	2021-03-26 15:01:16 +01:00
r8192U_wx.h	…