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authorMatthew Wilcox <matthew@wil.cx>2006-09-28 15:19:20 -0600
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-10-11 13:44:25 -0500
commit3e082a910d217b2e7b186077ebf5a1126a68c62f (patch)
treeb4ef4152b8ad0198283e36c74c990f38d90d27b7 /drivers/scsi/scsi_priv.h
parent53a5fbdc2dff55161a206ed1a1385a8fa8055c34 (diff)
downloadop-kernel-dev-3e082a910d217b2e7b186077ebf5a1126a68c62f.zip
op-kernel-dev-3e082a910d217b2e7b186077ebf5a1126a68c62f.tar.gz
[SCSI] Add ability to scan scsi busses asynchronously
Since it often takes around 20-30 seconds to scan a scsi bus, it's highly advantageous to do this in parallel with other things. The bulk of this patch is ensuring that devices don't change numbering, and that all devices are discovered prior to trying to start init. For those who build SCSI as modules, there's a new scsi_wait_scan module that will ensure all bus scans are finished. This patch only handles drivers which call scsi_scan_host. Fibre Channel, SAS, SATA, USB and Firewire all need additional work. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi_priv.h')
-rw-r--r--drivers/scsi/scsi_priv.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index 5d023d4..f458c2f 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -39,6 +39,9 @@ static inline void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
{ };
#endif
+/* scsi_scan.c */
+int scsi_complete_async_scans(void);
+
/* scsi_devinfo.c */
extern int scsi_get_device_flags(struct scsi_device *sdev,
const unsigned char *vendor,
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