linux-kernel - Re: [PATCH v2 RESEND 21/23] qla2xxx: Use pci_enable_msix_range() instead of pci_enable

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Message-ID: <alpine.OSX.2.00.1408111407050.1722@administrators-macbook-pro.local>
Date:	Mon, 11 Aug 2014 14:07:52 -0400
From:	Chad Dupuis <chad.dupuis@...gic.com>
To:	Alexander Gordeev <agordeev@...hat.com>
CC:	<qla2xxx-upstream@...gic.com>, <linux-scsi@...r.kernel.org>,
	<linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 RESEND 21/23] qla2xxx: Use pci_enable_msix_range()
 instead of pci_enable_msix()



On Mon, 11 Aug 2014, Alexander Gordeev wrote:

> On Wed, Jul 16, 2014 at 08:05:25PM +0200, Alexander Gordeev wrote:
>> As result of deprecation of MSI-X/MSI enablement functions
>> pci_enable_msix() and pci_enable_msi_block() all drivers
>> using these two interfaces need to be updated to use the
>> new pci_enable_msi_range()  or pci_enable_msi_exact()
>> and pci_enable_msix_range() or pci_enable_msix_exact()
>> interfaces.
>>
>> Log message code 0x00c6 preserved, although it is reported
>> after successful call to pci_enable_msix_range(), not before
>> possibly unsuccessful call to pci_enable_msix(). Consumers
>> of the error code should not notice the difference.
>
> Hello,
>
> Please, anyone (from QLogic especially) review this patch.
>
> Thanks!

Looks good.

Ack-by: Chad Dupuis <chad.dupuis@...gic.com>

>
>> Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
>> Cc: qla2xxx-upstream@...gic.com
>> Cc: linux-scsi@...r.kernel.org
>> Cc: linux-pci@...r.kernel.org
>> ---
>>  drivers/scsi/qla2xxx/qla_isr.c |   27 +++++++++++----------------
>>  1 files changed, 11 insertions(+), 16 deletions(-)
>>
>> diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
>> index a56825c..52d420f 100644
>> --- a/drivers/scsi/qla2xxx/qla_isr.c
>> +++ b/drivers/scsi/qla2xxx/qla_isr.c
>> @@ -2923,27 +2923,22 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
>>  	for (i = 0; i < ha->msix_count; i++)
>>  		entries[i].entry = i;
>>
>> -	ret = pci_enable_msix(ha->pdev, entries, ha->msix_count);
>> -	if (ret) {
>> -		if (ret < MIN_MSIX_COUNT)
>> -			goto msix_failed;
>> -
>> +	ret = pci_enable_msix_range(ha->pdev,
>> +				    entries, MIN_MSIX_COUNT, ha->msix_count);
>> +	if (ret < 0) {
>> +		ql_log(ql_log_fatal, vha, 0x00c7,
>> +		    "MSI-X: Failed to enable support, "
>> +		    "giving   up -- %d/%d.\n",
>> +		    ha->msix_count, ret);
>> +		goto msix_out;
>> +	} else if (ret < ha->msix_count) {
>>  		ql_log(ql_log_warn, vha, 0x00c6,
>>  		    "MSI-X: Failed to enable support "
>>  		    "-- %d/%d\n Retry with %d vectors.\n",
>>  		    ha->msix_count, ret, ret);
>> -		ha->msix_count = ret;
>> -		ret = pci_enable_msix(ha->pdev, entries, ha->msix_count);
>> -		if (ret) {
>> -msix_failed:
>> -			ql_log(ql_log_fatal, vha, 0x00c7,
>> -			    "MSI-X: Failed to enable support, "
>> -			    "giving   up -- %d/%d.\n",
>> -			    ha->msix_count, ret);
>> -			goto msix_out;
>> -		}
>> -		ha->max_rsp_queues = ha->msix_count - 1;
>>  	}
>> +	ha->msix_count = ret;
>> +	ha->max_rsp_queues = ha->msix_count - 1;
>>  	ha->msix_entries = kzalloc(sizeof(struct qla_msix_entry) *
>>  				ha->msix_count, GFP_KERNEL);
>>  	if (!ha->msix_entries) {
>> --
>> 1.7.7.6
>>
>
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