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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-08-22 16:53:31 -0500 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-10-03 11:46:13 -0500 |
| commit | 6f4267e3bd1211b3d09130e626b0b3d885077610 (patch) | |
| tree | e9350f919238866c3bcd9c340ffea639a0c5de1d /include/scsi/scsi_device.h | |
| parent | 0f1d87a2acb8fd1f2ef8af109a785123ddc1a6cb (diff) | |
| download | linux-6f4267e3bd1211b3d09130e626b0b3d885077610.tar.gz linux-6f4267e3bd1211b3d09130e626b0b3d885077610.tar.bz2 linux-6f4267e3bd1211b3d09130e626b0b3d885077610.zip | |
[SCSI] Update the SCSI state model to allow blocking in the created state
Brian King <brking@linux.vnet.ibm.com> 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 <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'include/scsi/scsi_device.h')
| -rw-r--r-- | include/scsi/scsi_device.h | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index cc46652e4658..b49e725be039 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 */ |