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ramoops: use module parameters instead of platform data if not available

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Use generic module parameters instead of platform data, if platform data
are not available.  This limitation has been introduced with commit
c3b92ce9e7 ("ramoops: use the platform data structure instead of module
params").

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Américo Wang <xiyou.wangcong@gmail.com>
Reported-by: Stevie Trujillo <stevie.trujillo@gmail.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Marco Stornelli 2011-07-26 16:08:57 -07:00 committed by Linus Torvalds
parent beda94da38
commit 13aefd7293
1 changed files with 35 additions and 12 deletions
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47
drivers/char/ramoops.c
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@ -26,6 +26,7 @@
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/ramoops.h>
#define RAMOOPS_KERNMSG_HDR "===="
@ -56,6 +57,9 @@ static struct ramoops_context {
int max_count;
} oops_cxt;
static struct platform_device *dummy;
static struct ramoops_platform_data *dummy_data;
static void ramoops_do_dump(struct kmsg_dumper *dumper,
enum kmsg_dump_reason reason, const char *s1, unsigned long l1,
const char *s2, unsigned long l2)
@ -106,27 +110,22 @@ static int __init ramoops_probe(struct platform_device *pdev)
struct ramoops_context *cxt = &oops_cxt;
int err = -EINVAL;
if (pdata) {
mem_size = pdata->mem_size;
mem_address = pdata->mem_address;
}
if (!mem_size) {
if (!pdata->mem_size) {
printk(KERN_ERR "ramoops: invalid size specification");
goto fail3;
}
rounddown_pow_of_two(mem_size);
rounddown_pow_of_two(pdata->mem_size);
if (mem_size < RECORD_SIZE) {
if (pdata->mem_size < RECORD_SIZE) {
printk(KERN_ERR "ramoops: size too small");
goto fail3;
}
cxt->max_count = mem_size / RECORD_SIZE;
cxt->max_count = pdata->mem_size / RECORD_SIZE;
cxt->count = 0;
cxt->size = mem_size;
cxt->phys_addr = mem_address;
cxt->size = pdata->mem_size;
cxt->phys_addr = pdata->mem_address;
if (!request_mem_region(cxt->phys_addr, cxt->size, "ramoops")) {
printk(KERN_ERR "ramoops: request mem region failed");
@ -179,12 +178,36 @@ static struct platform_driver ramoops_driver = {
static int __init ramoops_init(void)
{
return platform_driver_probe(&ramoops_driver, ramoops_probe);
int ret;
ret = platform_driver_probe(&ramoops_driver, ramoops_probe);
if (ret == -ENODEV) {
/*
* If we didn't find a platform device, we use module parameters
* building platform data on the fly.
*/
dummy_data = kzalloc(sizeof(struct ramoops_platform_data),
GFP_KERNEL);
if (!dummy_data)
return -ENOMEM;
dummy_data->mem_size = mem_size;
dummy_data->mem_address = mem_address;
dummy = platform_create_bundle(&ramoops_driver, ramoops_probe,
NULL, 0, dummy_data,
sizeof(struct ramoops_platform_data));
if (IS_ERR(dummy))
ret = PTR_ERR(dummy);
else
ret = 0;
}
return ret;
}
static void __exit ramoops_exit(void)
{
platform_driver_unregister(&ramoops_driver);
kfree(dummy_data);
}
module_init(ramoops_init);