linux-kernel - Re: [PATCH 05/10] vfio: ccw: Suppress unused event parameter

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Date:   Thu, 3 May 2018 12:34:21 +0200
From:   Pierre Morel <pmorel@...ux.vnet.ibm.com>
To:     Dong Jia Shi <bjsdjshi@...ux.vnet.ibm.com>
Cc:     pasic@...ux.vnet.ibm.com, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        cohuck@...hat.com
Subject: Re: [PATCH 05/10] vfio: ccw: Suppress unused event parameter

On 26/04/2018 09:36, Dong Jia Shi wrote:
> * Pierre Morel <pmorel@...ux.vnet.ibm.com> [2018-04-19 16:48:08 +0200]:
>
>> The fsm_func_t function type definition does not need the event
>> parameter since all functions are in a state/event table.
> Not sure if this will still be right after you addressed all of the
> comments on this version. But no hurt to point out some nits that I
> noticed below.
>
>> Signed-off-by: Pierre Morel <pmorel@...ux.vnet.ibm.com>
>> ---
>>   drivers/s390/cio/vfio_ccw_fsm.c     | 34 +++++++++++-----------------------
>>   drivers/s390/cio/vfio_ccw_private.h |  5 ++---
>>   2 files changed, 13 insertions(+), 26 deletions(-)
>>
>> diff --git a/drivers/s390/cio/vfio_ccw_fsm.c b/drivers/s390/cio/vfio_ccw_fsm.c
>> index f9855cd..f8ded70 100644
>> --- a/drivers/s390/cio/vfio_ccw_fsm.c
>> +++ b/drivers/s390/cio/vfio_ccw_fsm.c
>> @@ -55,8 +55,7 @@ static int fsm_io_helper(struct vfio_ccw_private *private)
>>   	}
>>   }
>>
>> -static int fsm_notoper(struct vfio_ccw_private *private,
>> -			enum vfio_ccw_event event)
>> +static int fsm_notoper(struct vfio_ccw_private *private)
>>   {
>>   	struct subchannel *sch = private->sch;
>>
>> @@ -65,36 +64,31 @@ static int fsm_notoper(struct vfio_ccw_private *private,
>>   	 * Probably we should send the machine check to the guest.
>>   	 */
>>   	css_sched_sch_todo(sch, SCH_TODO_UNREG);
>> -	private->state = VFIO_CCW_STATE_NOT_OPER;
>> -	return private->state;
>> +	return VFIO_CCW_STATE_NOT_OPER;
> This change should belong to a former patch.
>
> [...]
>
>> @@ -109,17 +103,14 @@ static int fsm_disabled_irq(struct vfio_ccw_private *private,
>>   /*
>>    * Deal with the ccw command request from the userspace.
>>    */
>> -static int fsm_io_request(struct vfio_ccw_private *private,
>> -			   enum vfio_ccw_event event)
>> +static int fsm_io_request(struct vfio_ccw_private *private)
>>   {
>> -	union orb *orb;
>>   	struct ccw_io_region *io_region = &private->io_region;
>> +	union orb *orb = (union orb *)io_region->orb_area;
>>   	struct mdev_device *mdev = private->mdev;
>>
>>   	private->state = VFIO_CCW_STATE_BOXED;
>>
>> -	orb = (union orb *)io_region->orb_area;
>> -
> Irrelevant change for this patch.
>
>>   	io_region->ret_code = cp_init(&private->cp, mdev_dev(mdev), orb);
>>   	if (io_region->ret_code)
>>   		goto err_out;
>> @@ -139,15 +130,13 @@ static int fsm_io_request(struct vfio_ccw_private *private,
>>   	return VFIO_CCW_STATE_BUSY;
>>
>>   err_out:
>> -	private->state = VFIO_CCW_STATE_IDLE;
>> -	return private->state;
>> +	return VFIO_CCW_STATE_IDLE;
> Should move to other patch.
>
> [...]
>
OK, I will move these changes in patch 4/10.

-- 
Pierre Morel
Linux/KVM/QEMU in Böblingen - Germany