linux-kernel - [PATCH] usb: gadget: midi2: Fix interpretation of is

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Message-ID: <20241127070213.8232-1-tiwai@suse.de>
Date: Wed, 27 Nov 2024 08:02:11 +0100
From: Takashi Iwai <tiwai@...e.de>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] usb: gadget: midi2: Fix interpretation of is_midi1 bits

The UMP Function Block info m1.0 field (represented by is_midi1 sysfs
entry) is an enumeration from 0 to 2, while the midi2 gadget driver
incorrectly copies it to the corresponding snd_ump_block_info.flags
bits as-is.  This made the wrong bit flags set when m1.0 = 2.

This patch corrects the wrong interpretation of is_midi1 bits.

Fixes: 29ee7a4dddd5 ("usb: gadget: midi2: Add configfs support")
Cc: <stable@...r.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
---
 drivers/usb/gadget/function/f_midi2.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/function/f_midi2.c b/drivers/usb/gadget/function/f_midi2.c
index 8285df9ed6fd..8c9d0074db58 100644
--- a/drivers/usb/gadget/function/f_midi2.c
+++ b/drivers/usb/gadget/function/f_midi2.c
@@ -1593,7 +1593,11 @@ static int f_midi2_create_card(struct f_midi2 *midi2)
 			fb->info.midi_ci_version = b->midi_ci_version;
 			fb->info.ui_hint = reverse_dir(b->ui_hint);
 			fb->info.sysex8_streams = b->sysex8_streams;
-			fb->info.flags |= b->is_midi1;
+			if (b->is_midi1 < 2)
+				fb->info.flags |= b->is_midi1;
+			else
+				fb->info.flags |= SNDRV_UMP_BLOCK_IS_MIDI1 |
+					SNDRV_UMP_BLOCK_IS_LOWSPEED;
 			strscpy(fb->info.name, ump_fb_name(b),
 				sizeof(fb->info.name));
 		}
-- 
2.43.0