diff options
| -rw-r--r-- | drivers/scsi/advansys.c | 120 |
1 files changed, 24 insertions, 96 deletions
diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c index cd17f28fd3ba..90f05c52be7e 100644 --- a/drivers/scsi/advansys.c +++ b/drivers/scsi/advansys.c @@ -2852,7 +2852,6 @@ typedef struct asc_board { } dvc_cfg; ushort asc_n_io_port; /* Number I/O ports. */ asc_queue_t active; /* Active command queue */ - asc_queue_t done; /* Done command queue */ ADV_SCSI_BIT_ID_TYPE init_tidmask; /* Target init./valid mask */ struct scsi_device *device[ADV_MAX_TID + 1]; /* Mid-Level Scsi Device */ ushort reqcnt[ADV_MAX_TID + 1]; /* Starvation request count */ @@ -3258,6 +3257,23 @@ static const char *advansys_info(struct Scsi_Host *shost) return info; } +static void asc_scsi_done(struct scsi_cmnd *scp) +{ + struct asc_board *boardp = ASC_BOARDP(scp->device->host); + + if (scp->use_sg) + dma_unmap_sg(boardp->dev, + (struct scatterlist *)scp->request_buffer, + scp->use_sg, scp->sc_data_direction); + else if (scp->request_bufflen) + dma_unmap_single(boardp->dev, scp->SCp.dma_handle, + scp->request_bufflen, scp->sc_data_direction); + + ASC_STATS(scp->device->host, done); + + scp->scsi_done(scp); +} + /* * advansys_queuecommand() - interrupt-driven I/O entrypoint. * @@ -3270,7 +3286,6 @@ advansys_queuecommand(struct scsi_cmnd *scp, void (*done) (struct scsi_cmnd *)) struct Scsi_Host *shost; asc_board_t *boardp; ulong flags; - struct scsi_cmnd *done_scp; int asc_res, result = 0; shost = scp->device->host; @@ -3291,9 +3306,8 @@ advansys_queuecommand(struct scsi_cmnd *scp, void (*done) (struct scsi_cmnd *)) break; case ASC_ERROR: default: - done_scp = asc_dequeue_list(&boardp->done, NULL, ASC_TID_ALL); /* Interrupts could be enabled here. */ - asc_scsi_done_list(done_scp); + asc_scsi_done(scp); break; } spin_unlock_irqrestore(&boardp->lock, flags); @@ -3410,12 +3424,6 @@ static int advansys_reset(struct scsi_cmnd *scp) /* Board lock is held. */ /* - * Dequeue all board 'done' requests. A pointer to the last request - * is returned in 'last_scp'. - */ - done_scp = asc_dequeue_list(&boardp->done, &last_scp, ASC_TID_ALL); - - /* * Dequeue all board 'active' requests for all devices and set * the request status to DID_RESET. A pointer to the last request * is returned in 'last_scp'. @@ -3548,8 +3556,6 @@ static struct scsi_host_template advansys_template = { static irqreturn_t advansys_interrupt(int irq, void *dev_id) { unsigned long flags; - struct scsi_cmnd *done_scp = NULL, *last_scp = NULL; - struct scsi_cmnd *new_last_scp; struct Scsi_Host *shost = dev_id; asc_board_t *boardp = ASC_BOARDP(shost); irqreturn_t result = IRQ_NONE; @@ -3577,49 +3583,13 @@ static irqreturn_t advansys_interrupt(int irq, void *dev_id) } } - /* - * Create a list of completed requests. - * - * If a reset request is being performed for the board, the reset - * handler will complete pending requests after it has completed. - */ - if ((boardp->flags & ASC_HOST_IN_RESET) == 0) { - ASC_DBG2(1, "advansys_interrupt: done_scp 0x%p, " - "last_scp 0x%p\n", done_scp, last_scp); - - /* - * Add to the list of requests that must be completed. - * - * 'done_scp' will always be NULL on the first iteration of - * this loop. 'last_scp' is set at the same time as 'done_scp'. - */ - if (done_scp == NULL) { - done_scp = asc_dequeue_list(&boardp->done, - &last_scp, ASC_TID_ALL); - } else { - ASC_ASSERT(last_scp != NULL); - last_scp->host_scribble = - (unsigned char *)asc_dequeue_list(&boardp-> - done, - &new_last_scp, - ASC_TID_ALL); - if (new_last_scp != NULL) { - ASC_ASSERT(REQPNEXT(last_scp) != NULL); - last_scp = new_last_scp; - } - } - } spin_unlock_irqrestore(&boardp->lock, flags); /* * If interrupts were enabled on entry, then they * are now enabled here. - * - * Complete all requests on the done list. */ - asc_scsi_done_list(done_scp); - ASC_DBG(1, "advansys_interrupt: end\n"); return result; } @@ -3836,27 +3806,11 @@ static void asc_scsi_done_list(struct scsi_cmnd *scp) ASC_DBG(2, "asc_scsi_done_list: begin\n"); while (scp != NULL) { - asc_board_t *boardp; - ASC_DBG1(3, "asc_scsi_done_list: scp 0x%lx\n", (ulong)scp); tscp = REQPNEXT(scp); scp->host_scribble = NULL; - boardp = ASC_BOARDP(scp->device->host); - - if (scp->use_sg) - dma_unmap_sg(boardp->dev, - (struct scatterlist *)scp->request_buffer, - scp->use_sg, scp->sc_data_direction); - else if (scp->request_bufflen) - dma_unmap_single(boardp->dev, scp->SCp.dma_handle, - scp->request_bufflen, - scp->sc_data_direction); - - ASC_STATS(scp->device->host, done); - ASC_ASSERT(scp->scsi_done != NULL); - - scp->scsi_done(scp); + asc_scsi_done(scp); scp = tscp; } @@ -3904,8 +3858,8 @@ static void asc_scsi_done_list(struct scsi_cmnd *scp) * on the board's 'active' queue and will be completed from the * interrupt handler. * - * If this function returns ASC_NOERROR the request has been enqueued - * on the board's 'done' queue and must be completed by the caller. + * If this function returns ASC_ERROR the host error code has been set, + * and the called must call asc_scsi_done. * * If ASC_BUSY is returned the request will be returned to the midlayer * and re-tried later. @@ -3972,7 +3926,6 @@ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp) boardp->id, asc_dvc_varp->err_code); ASC_STATS(scp->device->host, exe_error); scp->result = HOST_BYTE(DID_ERROR); - asc_enqueue(&boardp->done, scp, ASC_BACK); break; default: ASC_PRINT2("asc_execute_scsi_cmnd: board %d: " @@ -3980,7 +3933,6 @@ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp) boardp->id, asc_dvc_varp->err_code); ASC_STATS(scp->device->host, exe_unknown); scp->result = HOST_BYTE(DID_ERROR); - asc_enqueue(&boardp->done, scp, ASC_BACK); break; } } else { @@ -4011,11 +3963,6 @@ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp) */ return ASC_BUSY; case ASC_ERROR: - /* - * If an error is returned, then the request has been - * queued on the board done queue. It will be completed - * by the caller. - */ default: ASC_DBG(1, "asc_execute_scsi_cmnd: adv_build_req " "ASC_ERROR\n"); @@ -4048,7 +3995,6 @@ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp) boardp->id, adv_dvc_varp->err_code); ASC_STATS(scp->device->host, exe_error); scp->result = HOST_BYTE(DID_ERROR); - asc_enqueue(&boardp->done, scp, ASC_BACK); break; default: ASC_PRINT2("asc_execute_scsi_cmnd: board %d: " @@ -4056,7 +4002,6 @@ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp) boardp->id, adv_dvc_varp->err_code); ASC_STATS(scp->device->host, exe_unknown); scp->result = HOST_BYTE(DID_ERROR); - asc_enqueue(&boardp->done, scp, ASC_BACK); break; } } @@ -4071,8 +4016,7 @@ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp) * The global structures 'asc_scsi_q' and 'asc_sg_head' are * used to build the request. * - * If an error occurs, then queue the request on the board done - * queue and return ASC_ERROR. + * If an error occurs, then return ASC_ERROR. */ static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp) { @@ -4098,7 +4042,6 @@ static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp) "ASC_MAX_CDB_LEN %d\n", boardp->id, scp->cmd_len, ASC_MAX_CDB_LEN); scp->result = HOST_BYTE(DID_ERROR); - asc_enqueue(&boardp->done, scp, ASC_BACK); return ASC_ERROR; } asc_scsi_q.cdbptr = &scp->cmnd[0]; @@ -4167,7 +4110,6 @@ static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp) dma_unmap_sg(boardp->dev, slp, scp->use_sg, scp->sc_data_direction); scp->result = HOST_BYTE(DID_ERROR); - asc_enqueue(&boardp->done, scp, ASC_BACK); return ASC_ERROR; } @@ -4274,7 +4216,6 @@ adv_build_req(asc_board_t *boardp, struct scsi_cmnd *scp, ("adv_build_req: board %d: cmd_len %d > ADV_MAX_CDB_LEN %d\n", boardp->id, scp->cmd_len, ADV_MAX_CDB_LEN); scp->result = HOST_BYTE(DID_ERROR); - asc_enqueue(&boardp->done, scp, ASC_BACK); return ASC_ERROR; } scsiqp->cdb_len = scp->cmd_len; @@ -4342,7 +4283,6 @@ adv_build_req(asc_board_t *boardp, struct scsi_cmnd *scp, dma_unmap_sg(boardp->dev, slp, scp->use_sg, scp->sc_data_direction); scp->result = HOST_BYTE(DID_ERROR); - asc_enqueue(&boardp->done, scp, ASC_BACK); /* * Free the 'adv_req_t' structure by adding it back @@ -4628,13 +4568,7 @@ static void asc_isr_callback(ASC_DVC_VAR *asc_dvc_varp, ASC_QDONE_INFO *qdonep) boardp->init_tidmask |= ADV_TID_TO_TIDMASK(scp->device->id); } - /* - * Because interrupts may be enabled by the 'struct scsi_cmnd' done - * function, add the command to the end of the board's done queue. - * The done function for the command will be called from - * advansys_interrupt(). - */ - asc_enqueue(&boardp->done, scp, ASC_BACK); + asc_scsi_done(scp); return; } @@ -4790,13 +4724,7 @@ static void adv_isr_callback(ADV_DVC_VAR *adv_dvc_varp, ADV_SCSI_REQ_Q *scsiqp) boardp->init_tidmask |= ADV_TID_TO_TIDMASK(scp->device->id); } - /* - * Because interrupts may be enabled by the 'struct scsi_cmnd' done - * function, add the command to the end of the board's done queue. - * The done function for the command will be called from - * advansys_interrupt(). - */ - asc_enqueue(&boardp->done, scp, ASC_BACK); + asc_scsi_done(scp); /* * Free all 'adv_sgblk_t' structures allocated for the request. |