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| author | Christof Schmitt <christof.schmitt@de.ibm.com> | 2009-10-30 17:59:29 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 12:00:52 -0600 |
| commit | 65d430fa99cbd0e88d09a3343f697c51fc8a7009 (patch) | |
| tree | d0e7f7353bb227ff7585ff77cc682611acd1680b /drivers/scsi/scsi_transport_fc.c | |
| parent | 03b147083a2f9a2a3fbbd2505fa88ffa3c6ab194 (diff) | |
| download | kernel-common-65d430fa99cbd0e88d09a3343f697c51fc8a7009.tar.gz kernel-common-65d430fa99cbd0e88d09a3343f697c51fc8a7009.tar.bz2 kernel-common-65d430fa99cbd0e88d09a3343f697c51fc8a7009.zip | |
[SCSI] scsi_transport_fc: Introduce helper function for blocking scsi_eh
Move the duplicated code from FC LLDs to SCSI FC transport class.
Acked-by: James Smart <james.smart@emulex.com>
Acked-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Acked-by: Abhijeet Joglekar <abjoglek@cisco.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/scsi_transport_fc.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_fc.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c index f436e033adaf..3ce56b3b2cd7 100644 --- a/drivers/scsi/scsi_transport_fc.c +++ b/drivers/scsi/scsi_transport_fc.c @@ -27,6 +27,7 @@ */ #include <linux/module.h> #include <linux/init.h> +#include <linux/delay.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_transport.h> @@ -3144,6 +3145,31 @@ fc_scsi_scan_rport(struct work_struct *work) spin_unlock_irqrestore(shost->host_lock, flags); } +/** + * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport + * @cmnd: SCSI command that scsi_eh is trying to recover + * + * This routine can be called from a FC LLD scsi_eh callback. It + * blocks the scsi_eh thread until the fc_rport leaves the + * FC_PORTSTATE_BLOCKED. This is necessary to avoid the scsi_eh + * failing recovery actions for blocked rports which would lead to + * offlined SCSI devices. + */ +void fc_block_scsi_eh(struct scsi_cmnd *cmnd) +{ + struct Scsi_Host *shost = cmnd->device->host; + struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + while (rport->port_state == FC_PORTSTATE_BLOCKED) { + spin_unlock_irqrestore(shost->host_lock, flags); + msleep(1000); + spin_lock_irqsave(shost->host_lock, flags); + } + spin_unlock_irqrestore(shost->host_lock, flags); +} +EXPORT_SYMBOL(fc_block_scsi_eh); /** * fc_vport_setup - allocates and creates a FC virtual port. |