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serial: earlycon: Extend earlycon command line option to support 64-bit addresses

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earlycon implementation used "unsigned long" internally, but there are systems
(ARM with LPAE) where sizeof(unsigned long) == 4 and uart is mapped beyond 4GiB
address range.

Switch to resource_size_t internally and replace obsoleted simple_strtoul() with
kstrtoull().

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Sverdlin 2016-09-02 13:20:21 +02:00 committed by Greg Kroah-Hartman
parent 8f975fe49d
commit 46e36683f4
4 changed files with 14 additions and 9 deletions
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2
drivers/tty/serial/8250/8250_core.c
View File

@ -639,7 +639,7 @@ static int univ8250_console_match(struct console *co, char *name, int idx,
{
char match[] = "uart"; /* 8250-specific earlycon name */
unsigned char iotype;
unsigned long addr;
resource_size_t addr;
int i;
if (strncmp(name, match, 4) != 0)

7
drivers/tty/serial/earlycon.c
View File

@ -38,7 +38,7 @@ static struct earlycon_device early_console_dev = {
.con = &early_con,
};
static void __iomem * __init earlycon_map(unsigned long paddr, size_t size)
static void __iomem * __init earlycon_map(resource_size_t paddr, size_t size)
{
void __iomem *base;
#ifdef CONFIG_FIX_EARLYCON_MEM
@ -49,8 +49,7 @@ static void __iomem * __init earlycon_map(unsigned long paddr, size_t size)
base = ioremap(paddr, size);
#endif
if (!base)
pr_err("%s: Couldn't map 0x%llx\n", __func__,
(unsigned long long)paddr);
pr_err("%s: Couldn't map %pa\n", __func__, &paddr);
return base;
}
@ -92,7 +91,7 @@ static int __init parse_options(struct earlycon_device *device, char *options)
{
struct uart_port *port = &device->port;
int length;
unsigned long addr;
resource_size_t addr;
if (uart_parse_earlycon(options, &port->iotype, &addr, &options))
return -EINVAL;

12
drivers/tty/serial/serial_core.c
View File

@ -1892,11 +1892,14 @@ uart_get_console(struct uart_port *ports, int nr, struct console *co)
* console=<name>,0x<addr>,<options>
* is also accepted; the returned @iotype will be UPIO_MEM.
*
* Returns 0 on success or -EINVAL on failure
* Returns 0 on success, -EINVAL or -ERANGE on failure
*/
int uart_parse_earlycon(char *p, unsigned char *iotype, unsigned long *addr,
int uart_parse_earlycon(char *p, unsigned char *iotype, resource_size_t *addr,
char **options)
{
int ret;
unsigned long long tmp;
if (strncmp(p, "mmio,", 5) == 0) {
*iotype = UPIO_MEM;
p += 5;
@ -1922,7 +1925,10 @@ int uart_parse_earlycon(char *p, unsigned char *iotype, unsigned long *addr,
return -EINVAL;
}
*addr = simple_strtoul(p, NULL, 0);
ret = kstrtoull(p, 0, &tmp);
if (ret)
return ret;
*addr = tmp;
p = strchr(p, ',');
if (p)
p++;

2
include/linux/serial_core.h
View File

@ -374,7 +374,7 @@ extern int of_setup_earlycon(const struct earlycon_id *match,
struct uart_port *uart_get_console(struct uart_port *ports, int nr,
struct console *c);
int uart_parse_earlycon(char *p, unsigned char *iotype, unsigned long *addr,
int uart_parse_earlycon(char *p, unsigned char *iotype, resource_size_t *addr,
char **options);
void uart_parse_options(char *options, int *baud, int *parity, int *bits,
int *flow);