[PATCH] missing checks in acorn drivers

Adds missing return values checking of
misc_register(), scsi_register(), request_region()
and does some code cleanup in the process..

drivers/acorn/char/mouse_ps2.c

@@ -271,9 +271,15 @@ int __init psaux_init(void)
 	iomd_writeb(0, IOMD_MSECTL);
 	iomd_writeb(8, IOMD_MSECTL);
   
-	if (misc_register(&psaux_mouse))
-		return -ENODEV;
 	queue = (struct aux_queue *) kmalloc(sizeof(*queue), GFP_KERNEL);
+	if (queue == NULL)
+		return -ENOMEM;
+
+	if (misc_register(&psaux_mouse)) {
+		kfree(queue);
+		return -ENODEV;
+	}
+
 	memset(queue, 0, sizeof(*queue));
 	queue->head = queue->tail = 0;
 	init_waitqueue_head(&queue->proc_list);

drivers/acorn/net/etherh.c

@@ -553,15 +553,15 @@ static struct net_device * __init etherh_init_one(struct expansion_card *ec)
 
 	ecard_claim(ec);
 	
-	dev = init_etherdev(NULL, 0);
+	dev = init_etherdev(NULL, sizeof(struct etherh_priv));
 	if (!dev)
 		goto out;
 
-	eh = kmalloc(sizeof(struct etherh_priv), GFP_KERNEL);
-	if (!eh)
-		goto out_nopriv;
+	/*
+	 * init_etherdev allocs and zeros dev->priv
+	 */
+	eh = dev->priv;
 
-	memset(eh, 0, sizeof(struct etherh_priv));
 	spin_lock_init(&eh->eidev.page_lock);
 
 	SET_MODULE_OWNER(dev);
@@ -695,9 +695,8 @@ static struct net_device * __init etherh_init_one(struct expansion_card *ec)
 release:
 	release_region(dev->base_addr, 16);
 free:
-	kfree(eh);
-out_nopriv:
 	unregister_netdev(dev);
+	kfree(dev->priv);
 	kfree(dev);
 out:
 	ecard_release(ec);

drivers/acorn/scsi/acornscsi.c

@@ -2877,6 +2877,11 @@ int acornscsi_detect(Scsi_Host_Template * tpnt)
 	ecard_claim(ecs[count]); /* Must claim here - card produces irq on reset */
 
 	instance = scsi_register(tpnt, sizeof(AS_Host));
+	if (!instance) {
+		ecard_release(ecs[count]);
+		break;
+	}
+
 	host = (AS_Host *)instance->hostdata;
 
 	instance->io_port = ecard_address(ecs[count], ECARD_MEMC, 0);

drivers/acorn/scsi/cumana_1.c

@@ -140,6 +140,8 @@ int cumanascsi_detect(Scsi_Host_Template * tpnt)
     		break;
 
         instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+	if (!instance)
+		break;
         instance->io_port = CUMANA_ADDRESS(ecs[count]);
 	instance->irq = CUMANA_IRQ(ecs[count]);
 
@@ -147,7 +149,11 @@ int cumanascsi_detect(Scsi_Host_Template * tpnt)
 	ecard_claim(ecs[count]);
 
 	instance->n_io_port = 255;
-	request_region (instance->io_port, instance->n_io_port, "CumanaSCSI-1");
+	if ( !(request_region (instance->io_port, instance->n_io_port, "CumanaSCSI-1")) ) {
+		ecard_release(ecs[count]);
+		scsi_unregister(instance);
+		break;
+	}
 
         ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0;
         outb(0x00, instance->io_port - 577);

drivers/acorn/scsi/ecoscsi.c

@@ -103,39 +103,33 @@ int ecoscsi_detect(Scsi_Host_Template * tpnt)
 	tpnt->proc_name = "ecoscsi";
 
 	instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+	if (!instance)
+		return 0;
+
 	instance->io_port = 0x80ce8000;
 	instance->n_io_port = 144;
 	instance->irq = IRQ_NONE;
 
-    if (check_region (instance->io_port, instance->n_io_port)) {
-	scsi_unregister (instance);
-	return 0;
-    }
+	if ( !(request_region(instance->io_port, instance->n_io_port, "ecoscsi")) )
+		goto unregister_scsi;
 
 	ecoscsi_write (instance, MODE_REG, 0x20);		/* Is it really SCSI? */
-    if (ecoscsi_read (instance, MODE_REG) != 0x20) {	/* Write to a reg.    */
-        scsi_unregister(instance);
-        return 0;					/* and try to read    */
-    }
+	if (ecoscsi_read (instance, MODE_REG) != 0x20) /* Write to a reg.    */
+		goto release_reg;
+
 	ecoscsi_write( instance, MODE_REG, 0x00 );		/* it back.	      */
-    if (ecoscsi_read (instance, MODE_REG) != 0x00) {
-        scsi_unregister(instance);
-        return 0;
-    }
+	if (ecoscsi_read (instance, MODE_REG) != 0x00)
+		goto release_reg;
 
 	NCR5380_init(instance, 0);
-    if (request_region (instance->io_port, instance->n_io_port, "ecoscsi") == NULL)
-    	{
-	scsi_unregister(instance);
-	return 0;
-	}
 
-    if (instance->irq != IRQ_NONE)
+	if (instance->irq != IRQ_NONE) {
 		if (request_irq(instance->irq, do_ecoscsi_intr, SA_INTERRUPT, "ecoscsi", NULL)) {
 			printk("scsi%d: IRQ%d not free, interrupts disabled\n",
 			instance->host_no, instance->irq);
 			instance->irq = IRQ_NONE;
 		}
+	}
 
 	if (instance->irq != IRQ_NONE) {
 		printk("scsi%d: eek! Interrupts enabled, but I don't think\n", instance->host_no);
@@ -152,7 +146,14 @@ int ecoscsi_detect(Scsi_Host_Template * tpnt)
 	printk("\nscsi%d:", instance->host_no);
 	NCR5380_print_options(instance);
 	printk("\n");
+
 	return 1;
+
+release_reg:
+	release_region(instance->io_port, instance->n_io_port);
+unregister_scsi:
+	scsi_unregister(instance);
+	return 0
 }
 
 int ecoscsi_release (struct Scsi_Host *shpnt)

drivers/acorn/scsi/oak.c

@@ -126,6 +126,8 @@ int oakscsi_detect(Scsi_Host_Template * tpnt)
             break;
 
         instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+	if (!instance)
+		break;
         instance->io_port = OAK_ADDRESS(ecs[count]);
         instance->irq = OAK_IRQ(ecs[count]);
 
@@ -133,8 +135,11 @@ int oakscsi_detect(Scsi_Host_Template * tpnt)
 	ecard_claim(ecs[count]);
 
 	instance->n_io_port = 255;
-	if (!request_region (instance->io_port, instance->n_io_port, "Oak SCSI"))
+	if (!request_region (instance->io_port, instance->n_io_port, "Oak SCSI")) {
+		ecard_release(ecs[count]);
+		scsi_unregister(instance);
 		break;
+	}
 
 	if (instance->irq != IRQ_NONE)
 	    if (request_irq(instance->irq, do_oakscsi_intr, SA_INTERRUPT, "Oak SCSI", NULL)) {