linux-kernel - Re: [PATCH] mmc,sdio: Fix the panic due to devname NULL when calling pm_runtime_set

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Date:	Fri, 16 Nov 2012 21:33:18 +0200
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Chuansheng Liu <chuansheng.liu@...el.com>
Cc:	Chris Ball <cjb@...top.org>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc,sdio: Fix the panic due to devname NULL when calling pm_runtime_set_active()

Hi Liu,

On Fri, Nov 16, 2012 at 2:54 PM, Chuansheng Liu
<chuansheng.liu@...el.com> wrote:
> So when calling pm_runtime_set_active(), it will hit the strlen(devname==0)
> which trigger the panic.

Can you please point to the exact line of code that triggers this panic ?

> Here before calling pm_runtime_set_active(), set the dev name, although
> it is duplicated with mmc_add_card(), but it do not break the original
> design(commit 81968561b).

Normally we'd like to avoid such a solution, so let's first make sure
we understand the problem.

Have you tried thinking how come this shows up only now - has any of
the relevant code been changed lately ? Are you using a vanilla Linux
tree ?

Thanks,
Ohad.
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