Amitkumar Karwar ec815dd2a5 mwifiex: prevent register accesses after host is sleeping ... Following is mwifiex driver-firmware host sleep handshake. It involves three threads. suspend handler, interrupt handler, interrupt processing in main work queue. 1) Enter suspend handler 2) Download HS_CFG command 3) Response from firmware for HS_CFG 4) Suspend thread waits until handshake completes(i.e hs_activate becomes true) 5) SLEEP from firmware 6) SLEEP confirm downloaded to firmware. 7) SLEEP confirm response from firmware 8) Driver processes SLEEP confirm response and set hs_activate to wake up suspend thread 9) Exit suspend handler 10) Read sleep cookie in loop and wait until it indicates firmware is sleep. 11) After processing SLEEP confirm response, we are at the end of interrupt processing routine. Recheck if there are interrupts received while we were processing them. During suspend-resume stress test, it's been observed that we may end up acessing PCIe hardware(in 10 and 11) when PCIe bus is closed which leads to a kernel crash. This patch solves the problem with below changes. a) action 10 above can be done before 8 b) Skip 11 if hs_activated is true. SLEEP confirm response is the last interrupt from firmware. No need to recheck for pending interrupts. c) Add flush_workqueue() in suspend handler. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Reviewed-by: Brian Norris <briannorris@chromium.org> Tested-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>		2016-11-09 03:33:24 +02:00
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libertas	net: deprecate eth_change_mtu, remove usage	2016-10-13 09:36:57 -04:00
libertas_tf	net: wireless: marvell: libertas_tf: if_usb: don't print error when allocating urb fails	2016-08-13 14:53:41 -07:00
mwifiex	mwifiex: prevent register accesses after host is sleeping	2016-11-09 03:33:24 +02:00
Kconfig
Makefile
mwl8k.c	cfg80211: remove enum ieee80211_band	2016-04-12 15:56:15 +02:00