dma-buf: Correct the documentation of name and exp_name symbols

Fix the documentation of struct dma_buf members name and exp_name
as to how these members are to be used and accessed.

Signed-off-by: Ramesh Errabolu <[e-mail]>
Reviewed-by: Christian König <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Signed-off-by: Christian König <[e-mail]>

include/linux/dma-buf.h

···
 	/**
 	 * @exp_name:
 	 *
-	 * Name of the exporter; useful for debugging. See the
-	 * DMA_BUF_SET_NAME IOCTL.
+	 * Name of the exporter; useful for debugging. Must not be NULL
 	 */
 	const char *exp_name;
 
 	/**
 	 * @name:
 	 *
-	 * Userspace-provided name; useful for accounting and debugging,
-	 * protected by dma_resv_lock() on @resv and @name_lock for read access.
+	 * Userspace-provided name. Default value is NULL. If not NULL,
+	 * length cannot be longer than DMA_BUF_NAME_LEN, including NIL
+	 * char. Useful for accounting and debugging. Read/Write accesses
+	 * are protected by @name_lock
+	 *
+	 * See the IOCTLs DMA_BUF_SET_NAME or DMA_BUF_SET_NAME_A/B
 	 */
 	const char *name;