diff options
| -rw-r--r-- | drivers/block/cciss.c | 86 |
1 files changed, 45 insertions, 41 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 1c4df22dfd2a..7b0eca703a67 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -1233,6 +1233,50 @@ static inline void complete_buffers(struct bio *bio, int status) } } +static void cciss_check_queues(ctlr_info_t *h) +{ + int start_queue = h->next_to_run; + int i; + + /* check to see if we have maxed out the number of commands that can + * be placed on the queue. If so then exit. We do this check here + * in case the interrupt we serviced was from an ioctl and did not + * free any new commands. + */ + if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS) + return; + + /* We have room on the queue for more commands. Now we need to queue + * them up. We will also keep track of the next queue to run so + * that every queue gets a chance to be started first. + */ + for (i = 0; i < h->highest_lun + 1; i++) { + int curr_queue = (start_queue + i) % (h->highest_lun + 1); + /* make sure the disk has been added and the drive is real + * because this can be called from the middle of init_one. + */ + if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads)) + continue; + blk_start_queue(h->gendisk[curr_queue]->queue); + + /* check to see if we have maxed out the number of commands + * that can be placed on the queue. + */ + if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS) { + if (curr_queue == start_queue) { + h->next_to_run = + (start_queue + 1) % (h->highest_lun + 1); + break; + } else { + h->next_to_run = curr_queue; + break; + } + } else { + curr_queue = (curr_queue + 1) % (h->highest_lun + 1); + } + } +} + static void cciss_softirq_done(struct request *rq) { CommandList_struct *cmd = rq->completion_data; @@ -1264,6 +1308,7 @@ static void cciss_softirq_done(struct request *rq) spin_lock_irqsave(&h->lock, flags); end_that_request_last(rq, rq->errors); cmd_free(h, cmd, 1); + cciss_check_queues(h); spin_unlock_irqrestore(&h->lock, flags); } @@ -2528,8 +2573,6 @@ static irqreturn_t do_cciss_intr(int irq, void *dev_id, struct pt_regs *regs) CommandList_struct *c; unsigned long flags; __u32 a, a1, a2; - int j; - int start_queue = h->next_to_run; if (interrupt_not_for_us(h)) return IRQ_NONE; @@ -2588,45 +2631,6 @@ static irqreturn_t do_cciss_intr(int irq, void *dev_id, struct pt_regs *regs) } } - /* check to see if we have maxed out the number of commands that can - * be placed on the queue. If so then exit. We do this check here - * in case the interrupt we serviced was from an ioctl and did not - * free any new commands. - */ - if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS) - goto cleanup; - - /* We have room on the queue for more commands. Now we need to queue - * them up. We will also keep track of the next queue to run so - * that every queue gets a chance to be started first. - */ - for (j = 0; j < h->highest_lun + 1; j++) { - int curr_queue = (start_queue + j) % (h->highest_lun + 1); - /* make sure the disk has been added and the drive is real - * because this can be called from the middle of init_one. - */ - if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads)) - continue; - blk_start_queue(h->gendisk[curr_queue]->queue); - - /* check to see if we have maxed out the number of commands - * that can be placed on the queue. - */ - if ((find_first_zero_bit(h->cmd_pool_bits, NR_CMDS)) == NR_CMDS) { - if (curr_queue == start_queue) { - h->next_to_run = - (start_queue + 1) % (h->highest_lun + 1); - goto cleanup; - } else { - h->next_to_run = curr_queue; - goto cleanup; - } - } else { - curr_queue = (curr_queue + 1) % (h->highest_lun + 1); - } - } - - cleanup: spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags); return IRQ_HANDLED; } |