linux-kernel - Re: [PATCH 5/5] staging: hv: Gracefully handle SCSI resets

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Message-ID: <20100830235133.GB22941@kroah.com>
Date:	Mon, 30 Aug 2010 16:51:33 -0700
From:	Greg KH <greg@...ah.com>
To:	Hank Janssen <hjanssen@...rosoft.com>
Cc:	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"'devel@...verdev.osuosl.org'" <devel@...verdev.osuosl.org>,
	"'virtualization@...ts.osdl.org'" <virtualization@...ts.osdl.org>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	"'gregkh@...e.de'" <gregkh@...e.de>
Subject: Re: [PATCH 5/5] staging: hv: Gracefully handle SCSI resets

On Thu, Aug 05, 2010 at 07:30:37PM +0000, Hank Janssen wrote:
> From: Hank Janssen <hjanssen@...rosoft.com>
> 
> If we get a SCSI host bus reset we now gracefully handle it, and we take the
> device offline. This before sometimes caused hangs.
> 
> Signed-off-by:Hank Janssen <hjanssen@...rosoft.com>
> Signed-off-by:Haiyang Zhang <haiyangz@...rosoft.com>
> Cc: stable <stable@...nel.org>
> 
> ---
>  drivers/staging/hv/storvsc.c |   36 +++++++++++++++++++++++++++++++++++-
>  1 files changed, 35 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/staging/hv/storvsc.c b/drivers/staging/hv/storvsc.c index 6bd2ff1..5f222cf 100644
> --- a/drivers/staging/hv/storvsc.c
> +++ b/drivers/staging/hv/storvsc.c
> @@ -48,7 +48,9 @@ struct storvsc_device {
>  
>  	/* 0 indicates the device is being destroyed */
>  	atomic_t RefCount;
> -
> +	
> +	int reset;
> +	spinlock_t lock;
>  	atomic_t NumOutstandingRequests;
>  
>  	/*
> @@ -93,6 +95,9 @@ static inline struct storvsc_device *AllocStorDevice(struct hv_device *Device)
>  	atomic_cmpxchg(&storDevice->RefCount, 0, 2);
>  
>  	storDevice->Device = Device;
> +	storDevice->reset  = 0;
> +	spin_lock_init(&storDevice->lock);
> +
>  	Device->Extension = storDevice;
>  
>  	return storDevice;
> @@ -101,6 +106,7 @@ static inline struct storvsc_device *AllocStorDevice(struct hv_device *Device)  static inline void FreeStorDevice(struct storvsc_device *Device)  {
>  	/* ASSERT(atomic_read(&Device->RefCount) == 0); */

This patch is corrupted as well, something odd is going on in your email
system :(

care to resend it?

thanks,

greg k-h
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