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mwifiex: fix soft lockup during iperf UDP RX 

A soft lockup was observed on ARM multicore platform while UDP
RX iperf was running on station.

Reason for this is delay_main_task was not taken into consideration while
jumping to process_start. Now if delay_main_task is true, we would exit
mwifiex_main_process instead of going to process_start again.
This ensure other process is scheduled on this CPU and soft lockup is avoided.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kevin Gan <ganhy@marvell.com>
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Avinash Patil 2014-09-29 21:44:13 +05:30 committed by John W. Linville
parent b182427efa
commit f73e557bca
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/mwifiex/main.c
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@ -330,7 +330,8 @@ process_start:
} while (true);
spin_lock_irqsave(&adapter->main_proc_lock, flags);
if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) {
if (!adapter->delay_main_work &&
(adapter->int_status || IS_CARD_RX_RCVD(adapter))) {
spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
goto process_start;
}