nvmet: don't override treq upon modification.

Only override the allowed parts of it.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
[hch: slight tweak to the NVME_TREQ_SECURE_CHANNEL_MASK definition]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index e7d7317..4fc4807 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -61,6 +61,8 @@ enum {
 	NVMF_TREQ_NOT_SPECIFIED	= 0,	/* Not specified */
 	NVMF_TREQ_REQUIRED	= 1,	/* Required */
 	NVMF_TREQ_NOT_REQUIRED	= 2,	/* Not Required */
+#define NVME_TREQ_SECURE_CHANNEL_MASK \
+	(NVMF_TREQ_REQUIRED | NVMF_TREQ_NOT_REQUIRED)
 };
 
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