diff options
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index f98581f9e..88d6e981e 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -708,7 +708,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id) goto fail_id; q->backing_dev_info.ra_pages = - (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE; + (VM_MAX_READAHEAD * 1024) / PAGE_SIZE; q->backing_dev_info.capabilities = BDI_CAP_CGROUP_WRITEBACK; q->backing_dev_info.name = "block"; q->node = node_id; @@ -3534,6 +3534,30 @@ void blk_post_runtime_resume(struct request_queue *q, int err) spin_unlock_irq(q->queue_lock); } EXPORT_SYMBOL(blk_post_runtime_resume); + +/** + * blk_set_runtime_active - Force runtime status of the queue to be active + * @q: the queue of the device + * + * If the device is left runtime suspended during system suspend the resume + * hook typically resumes the device and corrects runtime status + * accordingly. However, that does not affect the queue runtime PM status + * which is still "suspended". This prevents processing requests from the + * queue. + * + * This function can be used in driver's resume hook to correct queue + * runtime PM status and re-enable peeking requests from the queue. It + * should be called before first request is added to the queue. + */ +void blk_set_runtime_active(struct request_queue *q) +{ + spin_lock_irq(q->queue_lock); + q->rpm_status = RPM_ACTIVE; + pm_runtime_mark_last_busy(q->dev); + pm_request_autosuspend(q->dev); + spin_unlock_irq(q->queue_lock); +} +EXPORT_SYMBOL(blk_set_runtime_active); #endif int __init blk_dev_init(void) |