linux-kernel - RE: [PATCH] USB: gadget: f_mass_storage: fix in fsg_common

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Date:	Wed, 12 May 2010 13:59:02 +0530
From:	Viral Mehta <Viral.Mehta@...infotech.com>
To:	Michal Nazarewicz <m.nazarewicz@...sung.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
CC:	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] USB: gadget: f_mass_storage: fix in fsg_common_init()
 error recovery

Hi,
________________________________________
>From: linux-usb-owner@...r.kernel.org [linux-usb-owner@...r.kernel.org] On Behalf Of Michal Nazarewicz [m.nazarewicz@...sung.com]
>Sent: Wednesday, May 12, 2010 1:46 PM
>To: linux-usb@...r.kernel.org
>Cc: Kyungmin Park; Marek Szyprowski; linux-kernel@...r.kernel.org
>Subject: [PATCH] USB: gadget: f_mass_storage: fix in fsg_common_init() error recovery

>In to places in fsg_common_init() an unconditional call to kfree()
>on common was performed in error recovery which is not a valid

If I am not wrong, common can not be NULL since it was already checked above.

2685         if (!common) {
2686                 common = kzalloc(sizeof *common, GFP_KERNEL);
2687                 if (!common)
2688                         return ERR_PTR(-ENOMEM);
2689                 common->free_storage_on_release = 1;


>behaviour since fsg_common structure is not always allocated by
>fsg_common_init().

>To fix, the calls has been replaced with a goto to a proper error
>recovery which does the correct thing.
---

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