"kernel: BUG: scheduling while atomic:" errors with linux kernel 4.6

[Bob Copeland]

+linux-wireless

On Thu, May 19, 2016 at 03:11:16PM -0600, James Feeney wrote:
> Arch linux 4.6-1
> wpa_supplicant 1:2.5-3
> Toshiba Satellite, circa 2011, with a Pentium Dual-Core Mobile
> Error is not seen on other machines.
> 
> kernel: BUG: scheduling while atomic: wpa_supplicant/375/0x00000002

This is a kernel bug, not a wpa_supplicant bug.  The linux-wireless mailing
list would be a more appropriate venue for this bug report.


> May 19 10:26:07 lapis kernel: BUG: scheduling while atomic: wpa_supplicant/627/0x00000002
[...]
> May 19 10:26:07 lapis kernel:  [<ffffffff815c2b39>] __schedule+0x899/0xad0
> May 19 10:26:07 lapis kernel:  [<ffffffff815c2dac>] schedule+0x3c/0x90
> May 19 10:26:07 lapis kernel:  [<ffffffff815c5bb2>] schedule_hrtimeout_range_clock+0xa2/0x120
> May 19 10:26:07 lapis kernel:  [<ffffffff810e8b80>] ? hrtimer_init+0x120/0x120
> May 19 10:26:07 lapis kernel:  [<ffffffff815c5ba6>] ? schedule_hrtimeout_range_clock+0x96/0x120
> May 19 10:26:07 lapis kernel:  [<ffffffff815c5c43>] schedule_hrtimeout_range+0x13/0x20
> May 19 10:26:07 lapis kernel:  [<ffffffff815c568f>] usleep_range+0x4f/0x70
> May 19 10:26:07 lapis kernel:  [<ffffffffa0667218>] rtl_rfreg_delay+0x38/0x50 [rtlwifi]
> May 19 10:26:07 lapis kernel:  [<ffffffffa06dd0e7>] rtl92c_phy_config_rf_with_headerfile+0xc7/0xe0 [rtl8192ce]

[Probably due to this kernel change:

commit 49f86ec21c01b654f6ec47f2f4567f4f9ebaa26b
Author: Larry Finger <Larry.Finger at lwfinger.net>
Date:   Mon Feb 15 16:12:07 2016 -0600

    rtlwifi: Change long delays to sleeps


...apparently this function isn't in sleepable context after all.]

-- 
Bob Copeland %% http://bobcopeland.com/