fix trident.c lockup on module load 2.4.22-rc1

Hi Marcelo,

This patch fixes a kernel lockup with 2.4.22-rc1 when the trident.c driver is loaded and the driver attempts to initialize the card. The problem is that in ali_ac97_get() we lock the card->lock spinlock, but never release it on the good path, only on the error path. This patch adds the missing spin_unlock_irqrestore().

Patch is against 2.4.22-rc1-cvs, tested and works, and fixes a pretty severe lockup bug. Please apply.

Cheers,
Muli.

Index: drivers/sound/trident.c
===================================================================
RCS file: /home/cvs/linux-2.4/drivers/sound/trident.c,v retrieving revision 1.29

diff -u -r1.29 trident.c
@@ -3014,6 +3014,8 @@
 	}
 	
 	data = inl(TRID_REG(card, address));
+
+	spin_unlock_irqrestore(&card->lock, flags); 
 	
 	return ((u16) (data >> 16));