Denis Kenzior
e7441c9274
mac80211: disable BHs/preemption in ieee80211_tx_control_port()
...
On pre-emption enabled kernels the following print was being seen due to
missing local_bh_disable/local_bh_enable calls. mac80211 assumes that
pre-emption is disabled in the data path.
BUG: using smp_processor_id() in preemptible [00000000] code: iwd/517
caller is __ieee80211_subif_start_xmit+0x144/0x210 [mac80211]
[...]
Call Trace:
dump_stack+0x5c/0x80
check_preemption_disabled.cold.0+0x46/0x51
__ieee80211_subif_start_xmit+0x144/0x210 [mac80211]
Fixes: 911806491425 ("mac80211: Add support for tx_control_port")
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
[commit message rewrite, fixes tag]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-06-29 09:39:08 +02:00
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