From 4f5099af4f3d5f999d8ab7784472d93e810e3912 Mon Sep 17 00:00:00 2001 From: Keith Busch Date: Mon, 3 Mar 2014 16:39:13 -0700 Subject: NVMe: IOCTL path RCU protect queue access This adds rcu protected access to a queue in the nvme IOCTL path to fix potential races between a surprise removal and queue usage in nvme_submit_sync_cmd. The fix holds the rcu_read_lock() here to prevent the nvme_queue from freeing while this path is executing so it can't sleep, and so this path will no longer wait for a available command id should they all be in use at the time a passthrough IOCTL request is received. Signed-off-by: Keith Busch Signed-off-by: Matthew Wilcox --- include/linux/nvme.h | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'include/linux') diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 98d367b06f9c..7c3f85bc10f1 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -151,10 +151,7 @@ struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, unsigned long addr, unsigned length); void nvme_unmap_user_pages(struct nvme_dev *dev, int write, struct nvme_iod *iod); -struct nvme_queue *get_nvmeq(struct nvme_dev *dev); -void put_nvmeq(struct nvme_queue *nvmeq); -int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, - u32 *result, unsigned timeout); +int nvme_submit_io_cmd(struct nvme_dev *, struct nvme_command *, u32 *); int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns); int nvme_submit_admin_cmd(struct nvme_dev *, struct nvme_command *, u32 *result); -- cgit v1.2.1