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Date: Mon, 28 Apr 2014 18:20:53 -0500
From: Rob Herring <robherring2@...il.com>
To: Yinghai Lu <yinghai@...nel.org>
Cc: "linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jslaby@...e.cz>,
Catalin Marinas <catalin.marinas@....com>,
Russell King <linux@....linux.org.uk>,
Will Deacon <will.deacon@....com>,
Arnd Bergmann <arnd@...db.de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 3/7] tty/serial: convert 8250 to generic earlycon
On Sat, Apr 26, 2014 at 1:19 AM, Yinghai Lu <yinghai@...nel.org> wrote:
> On Fri, Apr 18, 2014 at 3:19 PM, Rob Herring <robherring2@...il.com> wrote:
>> From: Rob Herring <robh@...nel.org>
>>
>> With the generic earlycon infrastructure in place, convert the 8250
>> early console to use it.
>>
>> Signed-off-by: Rob Herring <robh@...nel.org>
>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> Cc: Jiri Slaby <jslaby@...e.cz>
>> ---
>> drivers/tty/serial/8250/8250_early.c | 138 ++++-------------------------------
>> drivers/tty/serial/8250/Kconfig | 1 +
>> 2 files changed, 16 insertions(+), 123 deletions(-)
>
> Hi Greg, Rob
>
> This one in tty-next breaks booting: "console=uart8250,io,0x3f8,115200".
> No early console and regular console anymore.
>
> It should produce "early con and regular con".
This is what I get for running checkpatch and converting
simple_strtoul to kstrto* which are not so equivalent. kstrto* will
not convert things such as 115200n8 to a number.
Greg, Do you want a fix or for me to respin the series? The fix looks like this:
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c
index 73bf1e2..c92e830 100644
--- a/drivers/tty/serial/earlycon.c
+++ b/drivers/tty/serial/earlycon.c
@@ -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);
--
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