[PATCH 09/61] ALSA: powermac - Fix Oops when conflicting with aoa driver

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
------------------

From: Takashi Iwai <tiwai@xxxxxxx>

[PATCH] ALSA: powermac - Fix Oops when conflicting with aoa driver

Fixed Oops when conflictin with aoa driver due to lack of
i2c initialization.

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>

---
 sound/ppc/keywest.c |    3 +++
 1 file changed, 3 insertions(+)

--- linux-2.6.18.1.orig/sound/ppc/keywest.c
+++ linux-2.6.18.1/sound/ppc/keywest.c
@@ -117,6 +117,9 @@ int __init snd_pmac_tumbler_post_init(vo
 {
 	int err;
 	
+	if (!keywest_ctx || !keywest_ctx->client)
+		return -ENXIO;
+
 	if ((err = keywest_ctx->init_client(keywest_ctx)) < 0) {
 		snd_printk(KERN_ERR "tumbler: %i :cannot initialize the MCS\n", err);
 		return err;

--
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