linux-kernel - [PATCH AUTOSEL 4.9 56/62] ALSA: hda: Fix implicit PCM format type conversion

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Date:   Sun, 2 Sep 2018 13:15:11 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Takashi Iwai <tiwai@...e.de>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.9 56/62] ALSA: hda: Fix implicit PCM format type
 conversion

From: Takashi Iwai <tiwai@...e.de>

[ Upstream commit a6ea5fe95ab4a1a7af6d57429fe3ecde9acf5b5a ]

The PCM format type is defined with __bitwise, hence it can't be
passed as integer but needs an explicit cast.  In this patch, instead
of the messy cast flood, define the format argument of
snd_hdac_calc_stream_format() to be the proper snd_pcm_format_t type.

This fixes sparse warnings like:
  sound/hda/hdac_device.c:760:38: warning: incorrect type in argument 1 (different base types)

Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 include/sound/hdaudio.h | 3 ++-
 sound/hda/hdac_device.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 56004ec8d441..4b93a9c1ae87 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -9,6 +9,7 @@
 #include <linux/interrupt.h>
 #include <linux/timecounter.h>
 #include <sound/core.h>
+#include <sound/pcm.h>
 #include <sound/memalloc.h>
 #include <sound/hda_verbs.h>
 #include <drm/i915_component.h>
@@ -132,7 +133,7 @@ int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 			   hda_nid_t *start_id);
 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 					 unsigned int channels,
-					 unsigned int format,
+					 snd_pcm_format_t format,
 					 unsigned int maxbps,
 					 unsigned short spdif_ctls);
 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
index 03c9872c31cf..18509478d4e4 100644
--- a/sound/hda/hdac_device.c
+++ b/sound/hda/hdac_device.c
@@ -759,7 +759,7 @@ static struct hda_rate_tbl rate_bits[] = {
  */
 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 					 unsigned int channels,
-					 unsigned int format,
+					 snd_pcm_format_t format,
 					 unsigned int maxbps,
 					 unsigned short spdif_ctls)
 {
-- 
2.17.1