From f8bbfc247efb0e5fa69094614380768ce79afe17 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 19 May 2006 21:07:05 +0900 Subject: [PATCH] [PATCH] SCSI: make scsi_implement_eh() generic API for SCSI transports libata implemented a feature to schedule EH without an associated EH by manipulating shost->host_eh_scheduled in ata_scsi_schedule_eh() directly. Move this function to scsi_error.c and rename it to scsi_schedule_eh(). It is now an exported API for SCSI transports and exported via new header file drivers/scsi/scsi_transport_api.h This patch also de-export scsi_eh_wakeup() which was exported specifically for ata_scsi_schedule_eh(). Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/scsi/libata-eh.c | 3 ++- drivers/scsi/libata-scsi.c | 24 ------------------------ drivers/scsi/scsi_error.c | 23 ++++++++++++++++++++++- drivers/scsi/scsi_priv.h | 1 + drivers/scsi/scsi_transport_api.h | 6 ++++++ include/scsi/scsi_eh.h | 1 - 6 files changed, 31 insertions(+), 27 deletions(-) create mode 100644 drivers/scsi/scsi_transport_api.h diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c index 750e734..71b45ad 100644 --- a/drivers/scsi/libata-eh.c +++ b/drivers/scsi/libata-eh.c @@ -39,6 +39,7 @@ #include #include #include +#include "scsi_transport_api.h" #include @@ -432,7 +433,7 @@ void ata_port_schedule_eh(struct ata_port *ap) WARN_ON(!ap->ops->error_handler); ap->flags |= ATA_FLAG_EH_PENDING; - ata_schedule_scsi_eh(ap->host); + scsi_schedule_eh(ap->host); DPRINTK("port EH scheduled\n"); } diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index f036ae4..2007b4b 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -2745,27 +2745,3 @@ void ata_scsi_scan_host(struct ata_port *ap) scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); } } - -/** - * ata_schedule_scsi_eh - schedule EH for SCSI host - * @shost: SCSI host to invoke error handling on. - * - * Schedule SCSI EH without scmd. This is a hack. - * - * LOCKING: - * spin_lock_irqsave(host_set lock) - **/ -void ata_schedule_scsi_eh(struct Scsi_Host *shost) -{ - unsigned long flags; - - spin_lock_irqsave(shost->host_lock, flags); - - if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 || - scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) { - shost->host_eh_scheduled++; - scsi_eh_wakeup(shost); - } - - spin_unlock_irqrestore(shost->host_lock, flags); -} diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 9ca71cb..346ab72 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -56,7 +56,28 @@ void scsi_eh_wakeup(struct Scsi_Host *shost) printk("Waking error handler thread\n")); } } -EXPORT_SYMBOL_GPL(scsi_eh_wakeup); + +/** + * scsi_schedule_eh - schedule EH for SCSI host + * @shost: SCSI host to invoke error handling on. + * + * Schedule SCSI EH without scmd. + **/ +void scsi_schedule_eh(struct Scsi_Host *shost) +{ + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + + if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 || + scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) { + shost->host_eh_scheduled++; + scsi_eh_wakeup(shost); + } + + spin_unlock_irqrestore(shost->host_lock, flags); +} +EXPORT_SYMBOL_GPL(scsi_schedule_eh); /** * scsi_eh_scmd_add - add scsi cmd to error handling. diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h index 0b39081..27c4827 100644 --- a/drivers/scsi/scsi_priv.h +++ b/drivers/scsi/scsi_priv.h @@ -63,6 +63,7 @@ extern int scsi_delete_timer(struct scsi_cmnd *); extern void scsi_times_out(struct scsi_cmnd *cmd); extern int scsi_error_handler(void *host); extern int scsi_decide_disposition(struct scsi_cmnd *cmd); +extern void scsi_eh_wakeup(struct Scsi_Host *shost); extern int scsi_eh_scmd_add(struct scsi_cmnd *, int); /* scsi_lib.c */ diff --git a/drivers/scsi/scsi_transport_api.h b/drivers/scsi/scsi_transport_api.h new file mode 100644 index 0000000..934f0e6 --- /dev/null +++ b/drivers/scsi/scsi_transport_api.h @@ -0,0 +1,6 @@ +#ifndef _SCSI_TRANSPORT_API_H +#define _SCSI_TRANSPORT_API_H + +void scsi_schedule_eh(struct Scsi_Host *shost); + +#endif /* _SCSI_TRANSPORT_API_H */ diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h index 212c983..d160880 100644 --- a/include/scsi/scsi_eh.h +++ b/include/scsi/scsi_eh.h @@ -35,7 +35,6 @@ static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr) } -extern void scsi_eh_wakeup(struct Scsi_Host *shost); extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd, struct list_head *done_q); extern void scsi_eh_flush_done_q(struct list_head *done_q); -- 2.7.4