[ATM] s/uni driver overwrites 8-/16-bit mode.

drivers/atm/suni.c

@@ -297,7 +297,7 @@ int suni_init(struct atm_dev *dev)
 	mri = GET(MRI); /* reset SUNI */
 	PUT(mri | SUNI_MRI_RESET,MRI);
 	PUT(mri,MRI);
-	PUT(0,MT); /* disable all tests */
+	PUT((GET(MT) & SUNI_MT_DS27_53),MT); /* disable all tests */
 	REG_CHANGE(SUNI_TPOP_APM_S,SUNI_TPOP_APM_S_SHIFT,SUNI_TPOP_S_SONET,
 	    TPOP_APM); /* use SONET */
 	REG_CHANGE(SUNI_TACP_IUCHP_CLP,0,SUNI_TACP_IUCHP_CLP,

drivers/atm/suni.h

@@ -198,6 +198,7 @@
 #define SUNI_MT_IOTST		0x04	/* RW, enable test mode */
 #define SUNI_MT_DBCTRL		0x08	/* W, control data bus by CSB pin */
 #define SUNI_MT_PMCTST		0x10	/* W, PMC test mode */
+#define SUNI_MT_DS27_53		0x80	/* RW, select between 8- or 16- bit */
 
 
 #define SUNI_IDLE_PATTERN       0x6a    /* idle pattern */