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qla2x00t-32gbit: treewide: Convert del_timer*() to timer_shutdown*()

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Due to several bugs caused by timers being re-armed after they are
shutdown and just before they are freed, a new state of timers was added
called "shutdown".  After a timer is set to this state, then it can no
longer be re-armed.

The following script was run to find all the trivial locations where
del_timer() or del_timer_sync() is called in the same function that the
object holding the timer is freed.  It also ignores any locations where
the timer->function is modified between the del_timer*() and the free(),
as that is not considered a "trivial" case.

This was created by using a coccinelle script and the following
commands:

    $ cat timer.cocci
    @@
    expression ptr, slab;
    identifier timer, rfield;
    @@
    (
    -       del_timer(&ptr->timer);
    +       timer_shutdown(&ptr->timer);
    |
    -       del_timer_sync(&ptr->timer);
    +       timer_shutdown_sync(&ptr->timer);
    )
      ... when strict
          when != ptr->timer
    (
            kfree_rcu(ptr, rfield);
    |
            kmem_cache_free(slab, ptr);
    |
            kfree(ptr);
    )

    $ spatch timer.cocci . > /tmp/t.patch
    $ patch -p1 < /tmp/t.patch

Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Pavel Machek <pavel@ucw.cz> [ LED ]
Acked-by: Kalle Valo <kvalo@kernel.org> [ wireless ]
Acked-by: Paolo Abeni <pabeni@redhat.com> [ networking ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

[ commit 292a089d78d3e2f7944e60bb897c977785a321e3 upstream ]
This commit is contained in:
Steven Rostedt (Google)
2026-10-19 17:38:13 +03:00
committed by Gleb Chesnokov
parent ff01678c00
commit d86f62d3ed
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
qla2x00t-32gbit/qla_edif.c
+2 -2
View File
@@ -416,7 +416,7 @@ static void __qla2x00_release_all_sadb(struct scsi_qla_host *vha,
*/
if (edif_entry->delete_sa_index !=
INVALID_EDIF_SA_INDEX) {
timer_delete(&edif_entry->timer);
timer_shutdown(&edif_entry->timer);
/* build and send the aen */
fcport->edif.rx_sa_set = 1;
@@ -2873,7 +2873,7 @@ qla28xx_sa_update_iocb_entry(scsi_qla_host_t *v, struct req_que *req,
"%s: removing edif_entry %p, new sa_index: 0x%x\n",
__func__, edif_entry, pkt->sa_index);
qla_edif_list_delete_sa_index(sp->fcport, edif_entry);
timer_delete(&edif_entry->timer);
timer_shutdown(&edif_entry->timer);
ql_dbg(ql_dbg_edif, vha, 0x5033,
"%s: releasing edif_entry %p, new sa_index: 0x%x\n",