[PATCH 5.15.y 3/4] ALSA: emux: simplify snd_sf_list.callback handling

[Sasha Levin <sashal@kernel.org>]

From: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>

[ Upstream commit 4c4cbe66828f185903d2127aed6ac9b7302e9d3a ]

Both drivers provide both sample_new and sample_free, and it makes no
sense to pretend that they could not. In fact, load_data() would already
crash if sample_new was null. So remove the remaining null checks.

Contrary to that, the emu10k1 driver actually has a null sample_reset,
though I'm not convinced that this inconsistency is justified.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Message-ID: <20240406064830.1029573-18-oswald.buddenhagen@gmx.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Stable-dep-of: 8a5d87c2ba30 ("ALSA: emux: Stop voices before freeing zones in all cases")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/synth/emux/emux.c      |  6 ++----
 sound/synth/emux/soundfont.c | 12 +++++-------
 2 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/sound/synth/emux/emux.c b/sound/synth/emux/emux.c
index a870759d179ed..a02f952d74ba2 100644
--- a/sound/synth/emux/emux.c
+++ b/sound/synth/emux/emux.c
@@ -94,10 +94,8 @@ int snd_emux_register(struct snd_emux *emu, struct snd_card *card, int index, ch
 	/* create soundfont list */
 	memset(&sf_cb, 0, sizeof(sf_cb));
 	sf_cb.private_data = emu;
-	if (emu->ops.sample_new)
-		sf_cb.sample_new = sf_sample_new;
-	if (emu->ops.sample_free)
-		sf_cb.sample_free = sf_sample_free;
+	sf_cb.sample_new = sf_sample_new;
+	sf_cb.sample_free = sf_sample_free;
 	if (emu->ops.sample_reset)
 		sf_cb.sample_reset = sf_sample_reset;
 	emu->sflist = snd_sf_new(&sf_cb, emu->memhdr);
diff --git a/sound/synth/emux/soundfont.c b/sound/synth/emux/soundfont.c
index c8775c21bc6f2..c803c5c756114 100644
--- a/sound/synth/emux/soundfont.c
+++ b/sound/synth/emux/soundfont.c
@@ -1052,7 +1052,7 @@ load_guspatch(struct snd_sf_list *sflist, const char __user *data,
 	/*
 	 * load wave data
 	 */
-	if (smp->v.size > 0 && sflist->callback.sample_new) {
+	if (smp->v.size > 0) {
 		rc = sflist->callback.sample_new
 			(sflist->callback.private_data, smp, sflist->memhdr,
 			 data, count);
@@ -1417,9 +1417,8 @@ snd_sf_clear(struct snd_sf_list *sflist)
 		}
 		for (sp = sf->samples; sp; sp = nextsp) {
 			nextsp = sp->next;
-			if (sflist->callback.sample_free)
-				sflist->callback.sample_free(sflist->callback.private_data,
-							     sp, sflist->memhdr);
+			sflist->callback.sample_free(sflist->callback.private_data,
+						     sp, sflist->memhdr);
 			kfree(sp);
 		}
 		kfree(sf);
@@ -1521,9 +1520,8 @@ snd_soundfont_remove_unlocked(struct snd_sf_list *sflist)
 			nextsp = sp->next;
 			sf->samples = nextsp;
 			sflist->mem_used -= sp->v.truesize;
-			if (sflist->callback.sample_free)
-				sflist->callback.sample_free(sflist->callback.private_data,
-							     sp, sflist->memhdr);
+			sflist->callback.sample_free(sflist->callback.private_data,
+						     sp, sflist->memhdr);
 			kfree(sp);
 		}
 	}
-- 
2.53.0