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Groups > linux.kernel > #1240320
| From | Christoph Hellwig <hch@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index management |
| Date | 2015-10-06 11:50 +0200 |
| Message-ID | <qgx2G-2ob-7@gated-at.bofh.it> (permalink) |
| References | <qgn3j-4Wl-1@gated-at.bofh.it> <qgn3j-4Wl-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
> 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?
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[PATCHv2 0/1] Update SCSI hosts to use idr for host number mgmt Lee Duncan <lduncan@suse.com> - 2015-10-06 01:10 +0200
[PATCHv2 1/1] SCSI: update hosts module to use idr index management Lee Duncan <lduncan@suse.com> - 2015-10-06 01:10 +0200
Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index management Christoph Hellwig <hch@infradead.org> - 2015-10-06 11:50 +0200
Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index management James Bottomley <James.Bottomley@HansenPartnership.com> - 2015-10-06 19:20 +0200
Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index management Hannes Reinecke <hare@suse.com> - 2015-10-07 22:30 +0200
Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index management James Bottomley <James.Bottomley@HansenPartnership.com> - 2015-10-08 01:40 +0200
Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index management Lee Duncan <lduncan@suse.com> - 2015-10-06 19:20 +0200
Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index management Hannes Reinecke <hare@suse.com> - 2015-10-06 15:10 +0200
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