From 918c1e6843b7e81d0e5cf7994f41f28dc34c98b0 Mon Sep 17 00:00:00 2001 From: Douglas Miller Date: Wed, 2 Aug 2023 13:32:41 -0400 Subject: [PATCH] IB/hfi1: Fix possible panic during hotplug remove commit 4fdfaef71fced490835145631a795497646f4555 upstream. During hotplug remove it is possible that the update counters work might be pending, and may run after memory has been freed. Cancel the update counters work before freeing memory. Fixes: 7724105686e7 ("IB/hfi1: add driver files") Signed-off-by: Douglas Miller Signed-off-by: Dennis Dalessandro Link: https://lore.kernel.org/r/169099756100.3927190.15284930454106475280.stgit@awfm-02.cornelisnetworks.com Signed-off-by: Leon Romanovsky Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/hw/hfi1/chip.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c index 689921dc3d4a..b69dd618146e 100644 --- a/drivers/infiniband/hw/hfi1/chip.c +++ b/drivers/infiniband/hw/hfi1/chip.c @@ -12306,6 +12306,7 @@ static void free_cntrs(struct hfi1_devdata *dd) if (dd->synth_stats_timer.function) del_timer_sync(&dd->synth_stats_timer); + cancel_work_sync(&dd->update_cntr_work); ppd = (struct hfi1_pportdata *)(dd + 1); for (i = 0; i < dd->num_pports; i++, ppd++) { kfree(ppd->cntrs);