linux-kernel - [PATCH] intel_th: msu: fix kernel-doc warnings

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Message-ID: <20231206055528.10176-1-rdunlap@infradead.org>
Date:   Tue,  5 Dec 2023 21:55:28 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [PATCH] intel_th: msu: fix kernel-doc warnings

Correct function comments to prevent kernel-doc warnings
found when using "W=1".

msu.c:77: warning: Function parameter or member 'msc' not described in 'msc_window'
msu.c:122: warning: bad line: 
msu.c:760: warning: No description found for return value of 'msc_configure'
msu.c:1309: warning: Function parameter or member 'nr_pages' not described in 'msc_buffer_alloc'
msu.c:1309: warning: Function parameter or member 'nr_wins' not described in 'msc_buffer_alloc'
msu.c:1309: warning: Excess function parameter 'size' description in 'msc_buffer_alloc'
msu.c:1376: warning: No description found for return value of 'msc_buffer_free_unless_used'
msu.c:1444: warning: No description found for return value of 'msc_win_to_user'

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
---
 drivers/hwtracing/intel_th/msu.c |   12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff -- a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c
--- a/drivers/hwtracing/intel_th/msu.c
+++ b/drivers/hwtracing/intel_th/msu.c
@@ -61,6 +61,7 @@ enum lockout_state {
  * @lo_lock:	lockout state serialization
  * @nr_blocks:	number of blocks (pages) in this window
  * @nr_segs:	number of segments in this window (<= @nr_blocks)
+ * @msc:	pointer to the MSC device
  * @_sgt:	array of block descriptors
  * @sgt:	array of block descriptors
  */
@@ -119,7 +120,6 @@ struct msc_iter {
  * @user_count:		number of users of the buffer
  * @mmap_count:		number of mappings
  * @buf_mutex:		mutex to serialize access to buffer-related bits
-
  * @enabled:		MSC is enabled
  * @wrap:		wrapping is enabled
  * @mode:		MSC operating mode
@@ -755,6 +755,8 @@ unlock:
  * Program storage mode, wrapping, burst length and trace buffer address
  * into a given MSC. Then, enable tracing and set msc::enabled.
  * The latter is serialized on msc::buf_mutex, so make sure to hold it.
+ *
+ * Returns: %0 for success or a negative error code otherwise.
  */
 static int msc_configure(struct msc *msc)
 {
@@ -1291,7 +1293,8 @@ static void msc_buffer_free(struct msc *
 /**
  * msc_buffer_alloc() - allocate a buffer for MSC
  * @msc:	MSC device
- * @size:	allocation size in bytes
+ * @nr_pages:	number of pages for each window
+ * @nr_wins:	number of windows
  *
  * Allocate a storage buffer for MSC, depending on the msc::mode, it will be
  * either done via msc_buffer_contig_alloc() for SINGLE operation mode or
@@ -1370,6 +1373,9 @@ static int msc_buffer_unlocked_free_unle
  * @msc:	MSC device
  *
  * This is a locked version of msc_buffer_unlocked_free_unless_used().
+ *
+ * Return:	0 on successful deallocation or if there was no buffer to
+ *		deallocate, -EBUSY if there are active users.
  */
 static int msc_buffer_free_unless_used(struct msc *msc)
 {
@@ -1438,6 +1444,8 @@ struct msc_win_to_user_struct {
  * @data:	callback's private data
  * @src:	source buffer
  * @len:	amount of data to copy from the source buffer
+ *
+ * Returns: >= %0 for success or -errno for error.
  */
 static unsigned long msc_win_to_user(void *data, void *src, size_t len)
 {