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From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, linux-ide@vger.kernel.org,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org
Cc: Sathya Prakash <sathya.prakash@broadcom.com>,
	Sreekanth Reddy <sreekanth.reddy@broadcom.com>,
	Suganath Prabu Subramani  <suganath-prabu.subramani@broadcom.com>
Subject: Re: [PATCH v2 2/9] libata: fix ata_host_start()
Date: Fri, 6 Aug 2021 23:33:50 +0900	[thread overview]
Message-ID: <5ff8b910-7fef-fa5b-a6b5-8094e3e73ae0@opensource.wdc.com> (raw)
In-Reply-To: <1dca71ad49be897f9544d0de59204e42a5b56a50.camel@HansenPartnership.com>

On 2021/08/06 23:31, James Bottomley wrote:
> On Fri, 2021-08-06 at 16:42 +0900, Damien Le Moal wrote:
>> The loop on entry of ata_host_start() may not initialize host->ops to
>> a non NULL value. The test on the host_stop field of host->ops must
>> then be preceded by a check that host->ops is not NULL.
>>
>> Reported-by: kernel test robot <lkp@intel.com>
>> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
>> ---
>>  drivers/ata/libata-core.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
>> index ea8b91297f12..fe49197caf99 100644
>> --- a/drivers/ata/libata-core.c
>> +++ b/drivers/ata/libata-core.c
>> @@ -5573,7 +5573,7 @@ int ata_host_start(struct ata_host *host)
>>  			have_stop = 1;
>>  	}
>>  
>> -	if (host->ops->host_stop)
>> +	if (host->ops && host->ops->host_stop)
> 
> since have_stop was already set by the port ops, surely this entire if
> is redundant?

Will check.

> 
> James
> 
> 


-- 
Damien Le Moal
Western Digital Research

  reply	other threads:[~2021-08-06 14:33 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-06  7:42 [PATCH v2 0/9] libata cleanups and improvements Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 1/9] libata: fix ata_host_alloc_pinfo() Damien Le Moal
2021-08-06  8:49   ` Hannes Reinecke
2021-08-06 14:25   ` James Bottomley
2021-08-06 14:31     ` Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 2/9] libata: fix ata_host_start() Damien Le Moal
2021-08-06  8:50   ` Hannes Reinecke
2021-08-06 14:31   ` James Bottomley
2021-08-06 14:33     ` Damien Le Moal [this message]
2021-08-07  3:32     ` Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 3/9] libata: cleanup device sleep capability detection Damien Le Moal
2021-08-06  8:50   ` Hannes Reinecke
2021-08-06  7:42 ` [PATCH v2 4/9] libata: cleanup ata_dev_configure() Damien Le Moal
2021-08-06  9:07   ` Hannes Reinecke
2021-08-06  9:12     ` Damien Le Moal
2021-08-06  9:28       ` Hannes Reinecke
2021-08-06  9:32         ` Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 5/9] libata: cleanup NCQ priority handling Damien Le Moal
2021-08-06  9:09   ` Hannes Reinecke
2021-08-06  7:42 ` [PATCH v2 6/9] libata: fix ata_read_log_page() warning Damien Le Moal
2021-08-06  9:10   ` Hannes Reinecke
2021-08-06  7:42 ` [PATCH v2 7/9] libata: print feature list on device scan Damien Le Moal
2021-08-06  9:11   ` Hannes Reinecke
2021-08-06  7:42 ` [PATCH v2 8/9] libahci: Introduce ncq_prio_supported sysfs sttribute Damien Le Moal
2021-08-06  7:42 ` [PATCH v2 9/9] scsi: mpt3sas: Introduce sas_ncq_prio_supported " Damien Le Moal
2021-08-06  9:12   ` Hannes Reinecke
2021-08-06  9:16     ` Damien Le Moal

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