netdev - Re: [PATCH v4a 00/38] timers: Use timer_shutdown*() before freeing timers

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Message-ID: <20221105104730.2bfd6740@rorschach.local.home>
Date:   Sat, 5 Nov 2022 10:47:30 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Anna-Maria Gleixner <anna-maria@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>, rcu@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-s390@...r.kernel.org,
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        linux-acpi@...r.kernel.org,
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Subject: Re: [PATCH v4a 00/38] timers: Use timer_shutdown*() before freeing
 timers

On Sat, 5 Nov 2022 07:18:17 -0700
Guenter Roeck <linux@...ck-us.net> wrote:

> Just in case you didn't notice:
> 
> Looking through the resulting code, I think some of the remaining
> calls to del_singleshot_timer_sync() can be converted as well.
> 
> The calls in drivers/staging/wlan-ng/prism2usb.c:prism2sta_disconnect_usb()
> are obvious (the containing data structure is freed in the same function).
> For drivers/char/tpm/tpm-dev-common.c:tpm_common_release(), the containing
> data structure is freed in the calling code.

Well, actually it is. In patch 5/38:

-#define del_singleshot_timer_sync(t) del_timer_sync(t)
+#define del_singleshot_timer_sync(t) timer_shutdown_sync(t)

This was the reason for patch 1. It was the only user of that function
that reused the timer after calling that function.

-- Steve