This is a note to let you know that I've just added the patch titled
IB/hfi1: Fix possible panic during hotplug remove
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ib-hfi1-fix-possible-panic-during-hotplug-remove.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4fdfaef71fced490835145631a795497646f4555 Mon Sep 17 00:00:00 2001
From: Douglas Miller <doug.miller@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 2 Aug 2023 13:32:41 -0400
Subject: IB/hfi1: Fix possible panic during hotplug remove
From: Douglas Miller <doug.miller@xxxxxxxxxxxxxxxxxxxx>
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 <doug.miller@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/169099756100.3927190.15284930454106475280.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/hfi1/chip.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -12178,6 +12178,7 @@ static void free_cntrs(struct hfi1_devda
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);
Patches currently in stable-queue which might be from doug.miller@xxxxxxxxxxxxxxxxxxxx are
queue-4.19/ib-hfi1-fix-possible-panic-during-hotplug-remove.patch
