On 10/06/2015 02:40 AM, Christoph Hellwig wrote:
>> struct Scsi_Host *scsi_host_lookup(unsigned short hostnum)
>> {
>> - struct device *cdev;
>> - struct Scsi_Host *shost = NULL;
>> -
>> - cdev = class_find_device(&shost_class, NULL, &hostnum,
>> - __scsi_host_match);
>> - if (cdev) {
>> - shost = scsi_host_get(class_to_shost(cdev));
>> - put_device(cdev);
>> - }
>> + struct Scsi_Host *shost;
>> +
>> + spin_lock(&host_index_lock);
>> + shost = idr_find(&host_index_idr, hostnum);
>> + spin_unlock(&host_index_lock);
>> +
>> return shost;
>
> How does this actually grab a reference to the host?
Good catch -- I should have noticed that.
I will resubmit the patch.
--
Lee Duncan
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