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[PATCH 4/7] s390/vfio_ap: verify ZAPQ completion after return of response code zero

Tony Krowiak posted 7 patches 2 years, 9 months ago
There is a newer version of this series
[PATCH 4/7] s390/vfio_ap: verify ZAPQ completion after return of response code zero
Posted by Tony Krowiak 2 years, 9 months ago 
Verification that the asynchronous ZAPQ function has completed only needs
to be done when the response code indicates the function was successfully
initiated; so, let's call the apq_reset_check function immediately after
the response code zero is returned from the ZAPQ.

Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
---
 drivers/s390/crypto/vfio_ap_ops.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 5bf2d93ae8af..c0cf5050be59 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -1645,6 +1645,9 @@ static int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q)
 	switch (status.response_code) {
 	case AP_RESPONSE_NORMAL:
 		ret = 0;
+		/* if the reset has not completed, wait for it to take effect */
+		if (!status.queue_empty || status.irq_enabled)
+			ret = apq_reset_check(q);
 		break;
 	case AP_RESPONSE_RESET_IN_PROGRESS:
 		/*
@@ -1674,10 +1677,6 @@ static int vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q)
 		return -EIO;
 	}
 
-	/* wait for the reset to take effect */
-	if (!status.queue_empty && status.irq_enabled)
-		ret = apq_reset_check(q);
-
 free_resources:
 	vfio_ap_free_aqic_resources(q);
 
-- 
2.31.1
Re: [PATCH 4/7] s390/vfio_ap: verify ZAPQ completion after return of response code zero
Posted by Harald Freudenberger 2 years, 9 months ago 
On 2022-12-13 16:44, Tony Krowiak wrote:
> Verification that the asynchronous ZAPQ function has completed only 
> needs
> to be done when the response code indicates the function was 
> successfully
> initiated; so, let's call the apq_reset_check function immediately 
> after
> the response code zero is returned from the ZAPQ.
> 
> Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
> ---
>  drivers/s390/crypto/vfio_ap_ops.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/s390/crypto/vfio_ap_ops.c
> b/drivers/s390/crypto/vfio_ap_ops.c
> index 5bf2d93ae8af..c0cf5050be59 100644
> --- a/drivers/s390/crypto/vfio_ap_ops.c
> +++ b/drivers/s390/crypto/vfio_ap_ops.c
> @@ -1645,6 +1645,9 @@ static int vfio_ap_mdev_reset_queue(struct
> vfio_ap_queue *q)
>  	switch (status.response_code) {
>  	case AP_RESPONSE_NORMAL:
>  		ret = 0;
> +		/* if the reset has not completed, wait for it to take effect */
> +		if (!status.queue_empty || status.irq_enabled)
> +			ret = apq_reset_check(q);
>  		break;
>  	case AP_RESPONSE_RESET_IN_PROGRESS:
>  		/*
> @@ -1674,10 +1677,6 @@ static int vfio_ap_mdev_reset_queue(struct
> vfio_ap_queue *q)
>  		return -EIO;
>  	}
> 
> -	/* wait for the reset to take effect */
> -	if (!status.queue_empty && status.irq_enabled)
> -		ret = apq_reset_check(q);
> -
>  free_resources:
>  	vfio_ap_free_aqic_resources(q);

Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Re: [PATCH 4/7] s390/vfio_ap: verify ZAPQ completion after return of response code zero
Posted by Anthony Krowiak 2 years, 9 months ago 
On 12/15/22 5:54 AM, Harald Freudenberger wrote:
> On 2022-12-13 16:44, Tony Krowiak wrote:
>> Verification that the asynchronous ZAPQ function has completed only 
>> needs
>> to be done when the response code indicates the function was 
>> successfully
>> initiated; so, let's call the apq_reset_check function immediately after
>> the response code zero is returned from the ZAPQ.
>>
>> Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
>> ---
>>  drivers/s390/crypto/vfio_ap_ops.c | 7 +++----
>>  1 file changed, 3 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/s390/crypto/vfio_ap_ops.c
>> b/drivers/s390/crypto/vfio_ap_ops.c
>> index 5bf2d93ae8af..c0cf5050be59 100644
>> --- a/drivers/s390/crypto/vfio_ap_ops.c
>> +++ b/drivers/s390/crypto/vfio_ap_ops.c
>> @@ -1645,6 +1645,9 @@ static int vfio_ap_mdev_reset_queue(struct
>> vfio_ap_queue *q)
>>      switch (status.response_code) {
>>      case AP_RESPONSE_NORMAL:
>>          ret = 0;
>> +        /* if the reset has not completed, wait for it to take 
>> effect */
>> +        if (!status.queue_empty || status.irq_enabled)
>> +            ret = apq_reset_check(q);
>>          break;
>>      case AP_RESPONSE_RESET_IN_PROGRESS:
>>          /*
>> @@ -1674,10 +1677,6 @@ static int vfio_ap_mdev_reset_queue(struct
>> vfio_ap_queue *q)
>>          return -EIO;
>>      }
>>
>> -    /* wait for the reset to take effect */
>> -    if (!status.queue_empty && status.irq_enabled)
>> -        ret = apq_reset_check(q);
>> -
>>  free_resources:
>>      vfio_ap_free_aqic_resources(q);
>
> Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>


Thanks for the review.

Patchew 2.1-devel-b67e4c2

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