Luciano Coelho <[email protected]> wrote: > From: Luca Coelho <[email protected]> > > Work queues cannot be allocated when a mutex is held because the mutex > may be in use and that would make it sleep. Doing so generates the > following splat with 4.13+: > > [ 19.513298] ====================================================== > [ 19.513429] WARNING: possible circular locking dependency detected > [ 19.513557] 4.13.0-rc5+ #6 Not tainted > [ 19.513638] ------------------------------------------------------ > [ 19.513767] cpuhp/0/12 is trying to acquire lock: > [ 19.513867] (&tz->lock){+.+.+.}, at: [<ffffffff924afebb>] > thermal_zone_get_temp+0x5b/0xb0 > [ 19.514047] > [ 19.514047] but task is already holding lock: > [ 19.514166] (cpuhp_state){+.+.+.}, at: [<ffffffff91cc4baa>] > cpuhp_thread_fun+0x3a/0x210 > [ 19.514338] > [ 19.514338] which lock already depends on the new lock. > > This lock dependency already existed with previous kernel versions, > but it was not detected until commit 49dfe2a67797 ("cpuhotplug: Link > lock stacks for hotplug callbacks") was introduced. > > Reported-by: David Weinehall <[email protected]> > Reported-by: Jiri Kosina <[email protected]> > Signed-off-by: Luca Coelho <[email protected]>
Patch applied to wireless-drivers.git, thanks. 10a54d8196d1 iwlwifi: pcie: move rx workqueue initialization to iwl_trans_pcie_alloc() -- https://patchwork.kernel.org/patch/9914349/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
