linux-kernel - Re: [PATCH 1/3] drivers: base: add support for stmp-style devices

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Message-ID: <CAOMZO5C9EDi_Hy-8=iphr+154gyPgBLnjSVV0seLgi+HoK4zRw@mail.gmail.com>
Date:	Wed, 7 Mar 2012 19:40:22 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Wolfram Sang <w.sang@...gutronix.de>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>, Greg KH <gregkh@...e.de>,
	linux-kernel@...r.kernel.org, Huang Shijie <b32955@...escale.com>,
	Shawn Guo <shawn.guo@...aro.org>
Subject: Re: [PATCH 1/3] drivers: base: add support for stmp-style devices

On Wed, Mar 7, 2012 at 7:28 PM, Wolfram Sang <w.sang@...gutronix.de> wrote:
...
> +static int stmp_clear_poll_bit(void __iomem *addr, u32 mask)
> +{
> +       int timeout = 0x400;

Could you please add a proper timeout mechanism here?

Something like: http://patchwork.ozlabs.org/patch/137365/

,as you suggested in the first place ;-)

> +
> +       writel(mask, addr + STMP_OFFSET_REG_CLR);
> +       udelay(1);
> +       while ((readl(addr) & mask) && --timeout)
> +               /* nothing */;
> +
> +       return !timeout;
> +}
> +
> +int stmp_reset_block(void __iomem *reset_addr)
> +{
> +       int ret;
> +       int timeout = 0x400;

Same here.

Regards,

Fabio Estevam
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