From 89f48c4d67dd875cf2216d4402bf77eda41fbdd9 Mon Sep 17 00:00:00 2001 From: Luben Tuikov Date: Mon, 15 May 2006 20:57:18 +0900 Subject: [PATCH] SCSI: Introduce scsi_req_abort_cmd (REPOST) Introduce scsi_req_abort_cmd(struct scsi_cmnd *). This function requests that SCSI Core start recovery for the command by deleting the timer and adding the command to the eh queue. It can be called by either LLDDs or SCSI Core. LLDDs who implement their own error recovery MAY ignore the timeout event if they generated scsi_req_abort_cmd. First post: http://marc.theaimsgroup.com/?l=linux-scsi&m=113833937421677&w=2 Signed-off-by: Luben Tuikov Signed-off-by: Tejun Heo --- include/scsi/scsi_cmnd.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 1ace1b9fe53..88c6c4da6c0 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -151,5 +151,6 @@ extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t); extern void scsi_put_command(struct scsi_cmnd *); extern void scsi_io_completion(struct scsi_cmnd *, unsigned int, unsigned int); extern void scsi_finish_command(struct scsi_cmnd *cmd); +extern void scsi_req_abort_cmd(struct scsi_cmnd *cmd); #endif /* _SCSI_SCSI_CMND_H */ -- cgit v1.2.3 From ee7863bc68fa6ad6fe7cfcc0e5ebe9efe0c0664e Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 15 May 2006 20:57:20 +0900 Subject: [PATCH] SCSI: implement shost->host_eh_scheduled libata needs to invoke EH without scmd. This patch adds shost->host_eh_scheduled to implement such behavior. Currently the only user of this feature is libata and no general interface is defined. This patch simply adds handling for host_eh_scheduled where needed and exports scsi_eh_wakeup() to modules. The rest is upto libata. This is the result of the following discussion. http://thread.gmane.org/gmane.linux.scsi/23853/focus=9760 In short, SCSI host is not supposed to know about exceptions unrelated to specific device or command. Such exceptions should be handled by transport layer proper. However, the distinction is not essential to ATA and libata is planning to depart from SCSI, so, for the time being, libata will be using SCSI EH to handle such exceptions. Signed-off-by: Tejun Heo --- include/scsi/scsi_eh.h | 1 + include/scsi/scsi_host.h | 1 + 2 files changed, 2 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h index d160880b2a8..212c983a6a1 100644 --- a/include/scsi/scsi_eh.h +++ b/include/scsi/scsi_eh.h @@ -35,6 +35,7 @@ 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); diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index de6ce541a04..a42efd6e4be 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -472,6 +472,7 @@ struct Scsi_Host { */ unsigned int host_busy; /* commands actually active on low-level */ unsigned int host_failed; /* commands that failed. */ + unsigned int host_eh_scheduled; /* EH scheduled without command */ unsigned short host_no; /* Used for IOCTL_GET_IDLUN, /proc/scsi et al. */ int resetting; /* if set, it means that last_reset is a valid value */ -- cgit v1.2.3