From 2ba65367720d871f9d955ca3ef96358999182765 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Fri, 5 Oct 2007 15:55:03 -0400 Subject: [PATCH] [SCSI] sym53c8xx: Stop overriding scsi_done Instead of telling the reset routine that the command completed from sym_eh_done, do it from sym_xpt_done. The 'to_do' element of the ucmd is redundant -- it serves only to tell whether eh_done is valid or not, and we can tell this by checking to see if it's NULL. Signed-off-by: Matthew Wilcox Signed-off-by: James Bottomley --- drivers/scsi/sym53c8xx_2/sym_glue.c | 60 +++++++++-------------------- 1 file changed, 18 insertions(+), 42 deletions(-) diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c index b5e7c6478653..4de0692f5c4f 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.c +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -134,8 +134,6 @@ static struct scsi_transport_template *sym2_transport_template = NULL; * Driver private area in the SCSI command structure. */ struct sym_ucmd { /* Override the SCSI pointer structure */ - unsigned char to_do; /* For error handling */ - void (*old_done)(struct scsi_cmnd *); /* For error handling */ struct completion *eh_done; /* For error handling */ }; @@ -147,6 +145,12 @@ struct sym_ucmd { /* Override the SCSI pointer structure */ */ void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd) { + struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd); + BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd)); + + if (ucmd->eh_done) + complete(ucmd->eh_done); + scsi_dma_unmap(cmd); cmd->scsi_done(cmd); } @@ -585,26 +589,6 @@ static void sym53c8xx_timer(unsigned long npref) #define SYM_EH_BUS_RESET 2 #define SYM_EH_HOST_RESET 3 -/* - * What we will do regarding the involved SCSI command. - */ -#define SYM_EH_DO_IGNORE 0 -#define SYM_EH_DO_WAIT 2 - -/* - * scsi_done() alias when error recovery is in progress. - */ -static void sym_eh_done(struct scsi_cmnd *cmd) -{ - struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd); - BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd)); - - cmd->scsi_done = ucmd->old_done; - - if (ucmd->to_do == SYM_EH_DO_WAIT) - complete(ucmd->eh_done); -} - /* * Generic method for our eh processing. * The 'op' argument tells what we have to do. @@ -615,7 +599,7 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd) struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd); struct Scsi_Host *host = cmd->device->host; SYM_QUEHEAD *qp; - int to_do = SYM_EH_DO_IGNORE; + int cmd_queued = 0; int sts = -1; struct completion eh_done; @@ -626,19 +610,11 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd) FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) { struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); if (cp->cmd == cmd) { - to_do = SYM_EH_DO_WAIT; + cmd_queued = 1; break; } } - if (to_do == SYM_EH_DO_WAIT) { - init_completion(&eh_done); - ucmd->old_done = cmd->scsi_done; - ucmd->eh_done = &eh_done; - wmb(); - cmd->scsi_done = sym_eh_done; - } - /* Try to proceed the operation we have been asked for */ sts = -1; switch(op) { @@ -662,21 +638,21 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd) } /* On error, restore everything and cross fingers :) */ - if (sts) { - cmd->scsi_done = ucmd->old_done; - to_do = SYM_EH_DO_IGNORE; - } - - ucmd->to_do = to_do; - spin_unlock_irq(host->host_lock); + if (sts) + cmd_queued = 0; - if (to_do == SYM_EH_DO_WAIT) { + if (cmd_queued) { + init_completion(&eh_done); + ucmd->eh_done = &eh_done; + spin_unlock_irq(host->host_lock); if (!wait_for_completion_timeout(&eh_done, 5*HZ)) { - ucmd->to_do = SYM_EH_DO_IGNORE; - wmb(); + ucmd->eh_done = NULL; sts = -2; } + } else { + spin_unlock_irq(host->host_lock); } + dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname, sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed"); return sts ? SCSI_FAILED : SCSI_SUCCESS; -- GitLab