Messages in this thread | | | Subject | Re: [v2] iwlwifi: pcie: move rx workqueue initialization to iwl_trans_pcie_alloc() | From | Kalle Valo <> | Date | Thu, 24 Aug 2017 13:50:23 +0000 (UTC) |
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Luciano Coelho <luca@coelho.fi> wrote:
> From: Luca Coelho <luciano.coelho@intel.com> > > 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 <david.weinehall@intel.com> > Reported-by: Jiri Kosina <jikos@kernel.org> > Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
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
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