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Message-ID: <20200716072823.GA971895@kroah.com>
Date: Thu, 16 Jul 2020 09:28:23 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Kees Cook <keescook@...omium.org>
Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Oscar Carter <oscar.carter@....com>,
Mitchell Blank Jr <mitch@...oth.com>,
kernel-hardening@...ts.openwall.com,
Peter Zijlstra <peterz@...radead.org>,
kgdb-bugreport@...ts.sourceforge.net,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
alsa-devel@...a-project.org, Allen Pais <allen.lkml@...il.com>,
Christian Gromm <christian.gromm@...rochip.com>,
Will Deacon <will@...nel.org>, devel@...verdev.osuosl.org,
Jonathan Corbet <corbet@....net>,
Daniel Thompson <daniel.thompson@...aro.org>,
"David S. Miller" <davem@...emloft.net>,
Masahiro Yamada <masahiroy@...nel.org>,
Takashi Iwai <tiwai@...e.com>, Julian Wiedmann <jwi@...ux.ibm.com>,
"Matthew Wilcox (Oracle)" <willy@...radead.org>,
Christian Borntraeger <borntraeger@...ibm.com>,
Nishka Dasgupta <nishkadg.linux@...il.com>,
Jiri Slaby <jslaby@...e.com>, Jakub Kicinski <kuba@...nel.org>,
Guenter Roeck <linux@...ck-us.net>,
Wambui Karuga <wambui.karugax@...il.com>,
Vasily Gorbik <gor@...ux.ibm.com>, linux-s390@...r.kernel.org,
linux-kernel@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>,
linux-input@...r.kernel.org, Ursula Braun <ubraun@...ux.ibm.com>,
Stephen Boyd <swboyd@...omium.org>,
Chris Packham <chris.packham@...iedtelesis.co.nz>,
Harald Freudenberger <freude@...ux.ibm.com>,
Thomas Gleixner <tglx@...utronix.de>,
Jaroslav Kysela <perex@...ex.cz>, Felipe Balbi <balbi@...nel.org>,
Kyungtae Kim <kt0755@...il.com>, netdev@...r.kernel.org,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Douglas Anderson <dianders@...omium.org>,
Kevin Curtis <kevin.curtis@...site.co.uk>,
linux-usb@...r.kernel.org,
Jason Wessel <jason.wessel@...driver.com>,
Romain Perier <romain.perier@...il.com>,
Karsten Graul <kgraul@...ux.ibm.com>
Subject: Re: [PATCH 1/3] usb: gadget: udc: Avoid tasklet passing a global
On Wed, Jul 15, 2020 at 08:08:45PM -0700, Kees Cook wrote:
> There's no reason for the tasklet callback to set an argument since it
> always uses a global. Instead, use the global directly, in preparation
> for converting the tasklet subsystem to modern callback conventions.
>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
> drivers/usb/gadget/udc/snps_udc_core.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/gadget/udc/snps_udc_core.c b/drivers/usb/gadget/udc/snps_udc_core.c
> index 3fcded31405a..afdd28f332ce 100644
> --- a/drivers/usb/gadget/udc/snps_udc_core.c
> +++ b/drivers/usb/gadget/udc/snps_udc_core.c
> @@ -96,9 +96,7 @@ static int stop_pollstall_timer;
> static DECLARE_COMPLETION(on_pollstall_exit);
>
> /* tasklet for usb disconnect */
> -static DECLARE_TASKLET(disconnect_tasklet, udc_tasklet_disconnect,
> - (unsigned long) &udc);
> -
> +static DECLARE_TASKLET(disconnect_tasklet, udc_tasklet_disconnect, 0);
>
> /* endpoint names used for print */
> static const char ep0_string[] = "ep0in";
> @@ -1661,7 +1659,7 @@ static void usb_disconnect(struct udc *dev)
> /* Tasklet for disconnect to be outside of interrupt context */
> static void udc_tasklet_disconnect(unsigned long par)
> {
> - struct udc *dev = (struct udc *)(*((struct udc **) par));
> + struct udc *dev = udc;
> u32 tmp;
>
> DBG(dev, "Tasklet disconnect\n");
Feel free to just take this in your tree, no need to wait for the USB
stuff to land.
Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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