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| author | Santosh Sivaraj <santosh@fossix.org> | 2019-08-20 13:43:46 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-21 22:23:03 +1000 |
| commit | b5bda6263cad9a927e1a4edb7493d542da0c1410 (patch) | |
| tree | cb8af56489d70756a61dc329c0b1bf37494fed69 /arch/powerpc/kernel/mce.c | |
| parent | ccfb5bd71d3d1228090a8633800ae7cdf42a94ac (diff) | |
| download | lwn-b5bda6263cad9a927e1a4edb7493d542da0c1410.tar.gz lwn-b5bda6263cad9a927e1a4edb7493d542da0c1410.zip | |
powerpc/mce: Schedule work from irq_work
schedule_work() cannot be called from MCE exception context as MCE can
interrupt even in interrupt disabled context.
Fixes: 733e4a4c4467 ("powerpc/mce: hookup memory_failure for UE errors")
Cc: stable@vger.kernel.org # v4.15+
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190820081352.8641-2-santosh@fossix.org
Diffstat (limited to 'arch/powerpc/kernel/mce.c')
| -rw-r--r-- | arch/powerpc/kernel/mce.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c index b18df633eae9..cff31d4a501f 100644 --- a/arch/powerpc/kernel/mce.c +++ b/arch/powerpc/kernel/mce.c @@ -33,6 +33,7 @@ static DEFINE_PER_CPU(struct machine_check_event[MAX_MC_EVT], mce_ue_event_queue); static void machine_check_process_queued_event(struct irq_work *work); +static void machine_check_ue_irq_work(struct irq_work *work); void machine_check_ue_event(struct machine_check_event *evt); static void machine_process_ue_event(struct work_struct *work); @@ -40,6 +41,10 @@ static struct irq_work mce_event_process_work = { .func = machine_check_process_queued_event, }; +static struct irq_work mce_ue_event_irq_work = { + .func = machine_check_ue_irq_work, +}; + DECLARE_WORK(mce_ue_event_work, machine_process_ue_event); static void mce_set_error_info(struct machine_check_event *mce, @@ -199,6 +204,10 @@ void release_mce_event(void) get_mce_event(NULL, true); } +static void machine_check_ue_irq_work(struct irq_work *work) +{ + schedule_work(&mce_ue_event_work); +} /* * Queue up the MCE event which then can be handled later. @@ -216,7 +225,7 @@ void machine_check_ue_event(struct machine_check_event *evt) memcpy(this_cpu_ptr(&mce_ue_event_queue[index]), evt, sizeof(*evt)); /* Queue work to process this event later. */ - schedule_work(&mce_ue_event_work); + irq_work_queue(&mce_ue_event_irq_work); } /* |