From: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
KASAN testing revealed the following issue assocated with freeing an IRQ.
[50006.466686] Call Trace:
[50006.466691] <IRQ>
[50006.489538] dump_stack+0x5c/0x80
[50006.493475] print_address_description.constprop.6+0x1a/0x150
[50006.499872] ? irdma_sc_process_ceq+0x483/0x790 [irdma]
[50006.505742] ? irdma_sc_process_ceq+0x483/0x790 [irdma]
[50006.511644] kasan_report.cold.11+0x7f/0x118
[50006.516572] ? irdma_sc_process_ceq+0x483/0x790 [irdma]
[50006.522473] irdma_sc_process_ceq+0x483/0x790 [irdma]
[50006.528232] irdma_process_ceq+0xb2/0x400 [irdma]
[50006.533601] ? irdma_hw_flush_wqes_callback+0x370/0x370 [irdma]
[50006.540298] irdma_ceq_dpc+0x44/0x100 [irdma]
[50006.545306] tasklet_action_common.isra.14+0x148/0x2c0
[50006.551096] __do_softirq+0x1d0/0xaf8
[50006.555396] irq_exit_rcu+0x219/0x260
[50006.559670] irq_exit+0xa/0x20
[50006.563320] smp_apic_timer_interrupt+0x1bf/0x690
[50006.568645] apic_timer_interrupt+0xf/0x20
[50006.573341] </IRQ>
The issue is that a tasklet could be pending on another core racing
the delete of the irq.
Fix by insuring any scheduled tasklet is killed after deleting the
irq.
Fixes: 44d9e52977a1 ("RDMA/irdma: Implement device initialization definitions")
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
Signed-off-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
Signed-off-by: Sindhu Devale <sindhu.devale@xxxxxxxxx>
---
drivers/infiniband/hw/irdma/hw.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c
index bd4b2b896444..2f8d18d8be3b 100644
--- a/drivers/infiniband/hw/irdma/hw.c
+++ b/drivers/infiniband/hw/irdma/hw.c
@@ -570,6 +570,13 @@ static void irdma_destroy_irq(struct irdma_pci_f *rf,
dev->irq_ops->irdma_dis_irq(dev, msix_vec->idx);
irq_update_affinity_hint(msix_vec->irq, NULL);
free_irq(msix_vec->irq, dev_id);
+ if (rf == dev_id) {
+ tasklet_kill(&rf->dpc_tasklet);
+ } else {
+ struct irdma_ceq *iwceq = (struct irdma_ceq *)dev_id;
+
+ tasklet_kill(&iwceq->dpc_tasklet);
+ }
}
/**
--
2.42.0
