[alsa-devel] [PATCH] ASoC: Ensure we generate a driver name

[Mark Brown]

Commit 873bd4c (ASoC: Don't set invalid name string to snd_card->driver
field) broke generation of a driver name for all ASoC cards relying on the
automatic generation of one. Fix this by using the old default with spaces
replaced by underscores.

Signed-off-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
 sound/soc/soc-core.c |   17 ++++++++++++++---
 1 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 10e5cde..3096c0d 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -30,6 +30,7 @@
 #include <linux/bitops.h>
 #include <linux/debugfs.h>
 #include <linux/platform_device.h>
+#include <linux/ctype.h>
 #include <linux/slab.h>
 #include <sound/ac97_codec.h>
 #include <sound/core.h>
@@ -1432,9 +1433,19 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
 		 "%s", card->name);
 	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
 		 "%s", card->long_name ? card->long_name : card->name);
-	if (card->driver_name)
-		strlcpy(card->snd_card->driver, card->driver_name,
-			sizeof(card->snd_card->driver));
+	snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
+		 "%s", card->driver_name ? card->driver_name : card->name);
+	for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
+		switch (card->snd_card->driver[i]) {
+		case '_':
+		case '-':
+			break;
+		default:
+			if (!isalnum(card->snd_card->driver[i]))
+				card->snd_card->driver[i] = '_';
+			break;
+		}
+	}
 
 	if (card->late_probe) {
 		ret = card->late_probe(card);
-- 
1.7.6.3