From 6f4267e3bd1211b3d09130e626b0b3d885077610 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Fri, 22 Aug 2008 16:53:31 -0500 Subject: [SCSI] Update the SCSI state model to allow blocking in the created state Brian King reported that fibre channel devices can oops during scanning if their ports block (because the device goes from CREATED -> BLOCK -> RUNNING rather than CREATED -> BLOCK -> CREATED). Fix this by adding a new state: CREATED_BLOCK which can only transition back to CREATED and disallow the CREATED -> BLOCK transition. Now both the created and blocked states that the mid-layer recognises can include CREATED_BLOCK. Signed-off-by: James Bottomley --- include/scsi/scsi_device.h | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index cc46652e465..b49e725be03 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -42,9 +42,11 @@ enum scsi_device_state { * originate in the mid-layer) */ SDEV_OFFLINE, /* Device offlined (by error handling or * user request */ - SDEV_BLOCK, /* Device blocked by scsi lld. No scsi - * commands from user or midlayer should be issued - * to the scsi lld. */ + SDEV_BLOCK, /* Device blocked by scsi lld. No + * scsi commands from user or midlayer + * should be issued to the scsi + * lld. */ + SDEV_CREATED_BLOCK, /* same as above but for created devices */ }; enum scsi_device_event { @@ -393,11 +395,13 @@ static inline int scsi_device_online(struct scsi_device *sdev) } static inline int scsi_device_blocked(struct scsi_device *sdev) { - return sdev->sdev_state == SDEV_BLOCK; + return sdev->sdev_state == SDEV_BLOCK || + sdev->sdev_state == SDEV_CREATED_BLOCK; } static inline int scsi_device_created(struct scsi_device *sdev) { - return sdev->sdev_state == SDEV_CREATED; + return sdev->sdev_state == SDEV_CREATED || + sdev->sdev_state == SDEV_CREATED_BLOCK; } /* accessor functions for the SCSI parameters */ -- cgit v1.2.3