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tty/serial: fix generic earlycon option parsing

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Commit 9aac588759 (tty/serial: add generic serial earlycon) moved
console option parsing from 8250_early.c and converted to kstrto*
functions from simple_strtoul along the way. However, kstrto* functions
are not equivalent in that they do not allow non-convertible characters
at the end such as "115200n8". Fix this by changing back to
simple_strtoul and ignore what checkpatch.pl says.

Reported-by: Yinghai Lu <yinghai@kernel.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: linux-serial@vger.kernel.org

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rob Herring 2014-04-30 19:48:29 -05:00 committed by Greg Kroah-Hartman
parent fe1cf8af91
commit e26f1db9b8
1 changed files with 5 additions and 13 deletions
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18
drivers/tty/serial/earlycon.c
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@ -53,7 +53,7 @@ static int __init parse_options(struct earlycon_device *device,
char *options)
{
struct uart_port *port = &device->port;
int mmio, mmio32, length, ret;
int mmio, mmio32, length;
unsigned long addr;
if (!options)
@ -64,25 +64,19 @@ static int __init parse_options(struct earlycon_device *device,
if (mmio || mmio32) {
port->iotype = (mmio ? UPIO_MEM : UPIO_MEM32);
options += mmio ? 5 : 7;
ret = kstrtoul(options, 0, &addr);
if (ret)
return ret;
addr = simple_strtoul(options, NULL, 0);
port->mapbase = addr;
if (mmio32)
port->regshift = 2;
} else if (!strncmp(options, "io,", 3)) {
port->iotype = UPIO_PORT;
options += 3;
ret = kstrtoul(options, 0, &addr);
if (ret)
return ret;
addr = simple_strtoul(options, NULL, 0);
port->iobase = addr;
mmio = 0;
} else if (!strncmp(options, "0x", 2)) {
port->iotype = UPIO_MEM;
ret = kstrtoul(options, 0, &addr);
if (ret)
return ret;
addr = simple_strtoul(options, NULL, 0);
port->mapbase = addr;
} else {
return -EINVAL;
@ -93,9 +87,7 @@ static int __init parse_options(struct earlycon_device *device,
options = strchr(options, ',');
if (options) {
options++;
ret = kstrtouint(options, 0, &device->baud);
if (ret)
return ret;
device->baud = simple_strtoul(options, NULL, 0);
length = min(strcspn(options, " ") + 1,
(size_t)(sizeof(device->options)));
strlcpy(device->options, options, length);