From 7a5abb4b48570c3552e33ff4c72ae1e8dac3ba15 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 6 Jun 2016 23:20:49 +0200
Subject: nvme: factor out a add nvme_is_write helper

Centralize the check if a given NVMe command reads or writes data.

Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Jay Freyensee <james.p.freyensee@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
 include/linux/nvme.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'include/linux/nvme.h')

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 2b82f05fe4ec..dc815cc6718d 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -590,6 +590,11 @@ struct nvme_command {
 	};
 };
 
+static inline bool nvme_is_write(struct nvme_command *cmd)
+{
+	return cmd->common.opcode & 1;
+}
+
 enum {
 	NVME_SC_SUCCESS			= 0x0,
 	NVME_SC_INVALID_OPCODE		= 0x1,
-- 
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