From: Greg KH <gregkh@linuxfoundation.org>
To: Rupesh Gujare <rupesh.gujare@atmel.com>
Cc: devel@linuxdriverproject.org, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/4] staging: ozwpan: Increment port number for new device.
Date: Mon, 12 Aug 2013 14:57:56 -0700 [thread overview]
Message-ID: <20130812215756.GA28233@kroah.com> (raw)
In-Reply-To: <1375724415-10801-3-git-send-email-rupesh.gujare@atmel.com>
On Mon, Aug 05, 2013 at 06:40:13PM +0100, Rupesh Gujare wrote:
> This patch fixes crash issue when there is quick cycle of
> de-enumeration & enumeration due to loss of wireless link.
>
> It is found that sometimes new device (or coming back device)
> returns very fast, even before USB core read out hub status,
> resulting in allocation of same port, which results in unstable
> system & crash.
>
> Above issue is resolved by making sure that we always assign
> new port to new device, making sure that USB core reads correct
> hub status.
>
> Signed-off-by: Rupesh Gujare <rupesh.gujare@atmel.com>
> ---
> drivers/staging/ozwpan/ozhcd.c | 16 +++++++++++-----
> 1 file changed, 11 insertions(+), 5 deletions(-)
No, don't paper over this, fix it correctly with reference counting as
Dan has suggested.
thanks,
greg k-h
next prev parent reply other threads:[~2013-08-12 21:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-05 17:40 [PATCH 0/4] staging: ozwpan: Fix crash issues Rupesh Gujare
2013-08-05 17:40 ` [PATCH 1/4] staging: ozwpan: Fixes crash due to invalid port aceess Rupesh Gujare
2013-08-05 18:20 ` Dan Carpenter
2013-08-05 17:40 ` [PATCH 2/4] staging: ozwpan: Increment port number for new device Rupesh Gujare
2013-08-05 17:53 ` Dan Carpenter
2013-08-05 18:43 ` Rupesh Gujare
2013-08-05 20:23 ` Dan Carpenter
2013-08-05 20:33 ` Dan Carpenter
2013-08-06 10:26 ` Rupesh Gujare
2013-08-06 10:41 ` Dan Carpenter
2013-08-12 21:57 ` Greg KH [this message]
2013-08-05 17:40 ` [PATCH 3/4] staging: ozwpan: Reset port configuration number Rupesh Gujare
2013-08-05 18:21 ` Dan Carpenter
2013-08-05 18:58 ` Rupesh Gujare
2013-08-05 17:40 ` [PATCH 4/4] staging: ozwpan: Return correct hub status Rupesh Gujare
2013-08-05 18:56 ` Dan Carpenter
2013-08-05 19:00 ` Rupesh Gujare
2013-08-05 19:28 ` Dan Carpenter
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