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SubjectRe: [PATCH] usb/gadget/snps_udc_core: Convert timers to use timer_setup()
Date
On Mon, Oct 16 2017, Kees Cook wrote:
> In preparation for unconditionally passing the struct timer_list pointer to
> all timer callbacks, switch to using the new timer_setup() and from_timer()
> to pass the timer pointer explicitly.
>
> If the probe fails, udc_remove() will not be called, so there is no
> reason to make del_timer_sync() calls conditional. As a result, use of
> the .data field can be dropped, in support of making removing this field
> entirely from struct timer_list.
>
> Cc: Felipe Balbi <balbi@kernel.org>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Raviteja Garimella <raviteja.garimella@broadcom.com>
> Cc: Michal Nazarewicz <mina86@mina86.com>

Acked-by: Michal Nazarewicz <mina86@mina86.com>

> Cc: "Gustavo A. R. Silva" <garsilva@embeddedor.com>
> Cc: linux-usb@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>
> ---
> drivers/usb/gadget/udc/snps_udc_core.c | 19 ++++++-------------
> 1 file changed, 6 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/usb/gadget/udc/snps_udc_core.c b/drivers/usb/gadget/udc/snps_udc_core.c
> index 47df99dbaef4..2f5e788dd978 100644
> --- a/drivers/usb/gadget/udc/snps_udc_core.c
> +++ b/drivers/usb/gadget/udc/snps_udc_core.c
> @@ -1733,7 +1733,7 @@ static void udc_soft_reset(struct udc *dev)
> }
>
> /* RDE timer callback to set RDE bit */
> -static void udc_timer_function(unsigned long v)
> +static void udc_timer_function(struct timer_list *unused)
> {
> u32 tmp;
>
> @@ -1813,7 +1813,7 @@ static void udc_handle_halt_state(struct udc_ep *ep)
> }
>
> /* Stall timer callback to poll S bit and set it again after */
> -static void udc_pollstall_timer_function(unsigned long v)
> +static void udc_pollstall_timer_function(struct timer_list *unused)
> {
> struct udc_ep *ep;
> int halted = 0;
> @@ -3067,14 +3067,12 @@ void udc_remove(struct udc *dev)
> stop_timer++;
> if (timer_pending(&udc_timer))
> wait_for_completion(&on_exit);
> - if (udc_timer.data)
> - del_timer_sync(&udc_timer);
> + del_timer_sync(&udc_timer);
> /* remove pollstall timer */
> stop_pollstall_timer++;
> if (timer_pending(&udc_pollstall_timer))
> wait_for_completion(&on_pollstall_exit);
> - if (udc_pollstall_timer.data)
> - del_timer_sync(&udc_pollstall_timer);
> + del_timer_sync(&udc_pollstall_timer);
> udc = NULL;
> }
> EXPORT_SYMBOL_GPL(udc_remove);
> @@ -3164,10 +3162,6 @@ int udc_probe(struct udc *dev)
> u32 reg;
> int retval;
>
> - /* mark timer as not initialized */
> - udc_timer.data = 0;
> - udc_pollstall_timer.data = 0;
> -
> /* device struct setup */
> dev->gadget.ops = &udc_ops;
>
> @@ -3207,9 +3201,8 @@ int udc_probe(struct udc *dev)
> goto finished;
>
> /* timer init */
> - setup_timer(&udc_timer, udc_timer_function, 1);
> - /* timer pollstall init */
> - setup_timer(&udc_pollstall_timer, udc_pollstall_timer_function, 1);
> + timer_setup(&udc_timer, udc_timer_function, 0);
> + timer_setup(&udc_pollstall_timer, udc_pollstall_timer_function, 0);
>
> /* set SD */
> reg = readl(&dev->regs->ctl);
> --
> 2.7.4

--
Best regards
ミハウ “𝓶𝓲𝓷𝓪86” ナザレヴイツ
«If at first you don’t succeed, give up skydiving»

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