From f12ad7d59ab77591e4ab2dacd6faa9ea9afffb99 Mon Sep 17 00:00:00 2001 From: Amol Lad Date: Sat, 30 Sep 2006 23:29:20 -0700 Subject: [PATCH] [PATCH] ioremap balanced with iounmap for drivers/serial/8250_acorn,c ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/serial/8250_acorn.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/serial/8250_acorn.c b/drivers/serial/8250_acorn.c index 32af3650e8b4..ef8cc8a70c60 100644 --- a/drivers/serial/8250_acorn.c +++ b/drivers/serial/8250_acorn.c @@ -35,6 +35,7 @@ struct serial_card_type { struct serial_card_info { unsigned int num_ports; int ports[MAX_PORTS]; + void __iomem *vaddr; }; static int __devinit @@ -44,7 +45,6 @@ serial_card_probe(struct expansion_card *ec, const struct ecard_id *id) struct serial_card_type *type = id->data; struct uart_port port; unsigned long bus_addr; - unsigned char __iomem *virt_addr; unsigned int i; info = kmalloc(sizeof(struct serial_card_info), GFP_KERNEL); @@ -55,8 +55,8 @@ serial_card_probe(struct expansion_card *ec, const struct ecard_id *id) info->num_ports = type->num_ports; bus_addr = ecard_resource_start(ec, type->type); - virt_addr = ioremap(bus_addr, ecard_resource_len(ec, type->type)); - if (!virt_addr) { + info->vaddr = ioremap(bus_addr, ecard_resource_len(ec, type->type)); + if (!info->vaddr) { kfree(info); return -ENOMEM; } @@ -72,7 +72,7 @@ serial_card_probe(struct expansion_card *ec, const struct ecard_id *id) port.dev = &ec->dev; for (i = 0; i < info->num_ports; i ++) { - port.membase = virt_addr + type->offset[i]; + port.membase = info->vaddr + type->offset[i]; port.mapbase = bus_addr + type->offset[i]; info->ports[i] = serial8250_register_port(&port); @@ -92,6 +92,7 @@ static void __devexit serial_card_remove(struct expansion_card *ec) if (info->ports[i] > 0) serial8250_unregister_port(info->ports[i]); + iounmap(info->vaddr); kfree(info); } -- 2.20.1