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--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -10,6 +10,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
+#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <linux/bio.h>
@@ -211,13 +212,14 @@ static void block2mtd_free_device(struct
/* FIXME: ensure that mtd->size % erase_size == 0 */
-static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
+static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname, int timeout)
{
const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
- struct block_device *bdev;
+ struct block_device *bdev = ERR_PTR(-ENODEV);
struct block2mtd_dev *dev;
struct mtd_partition *part;
char *name;
+ int i;
if (!devname)
return NULL;
@@ -228,15 +230,20 @@ static struct block2mtd_dev *add_device(
/* Get a handle on the device */
bdev = blkdev_get_by_path(devname, mode, dev);
+
#ifndef MODULE
- if (IS_ERR(bdev)) {
+ for (i = 0; IS_ERR(bdev) && i <= timeout; i++) {
+ dev_t devt;
- /* We might not have rootfs mounted at this point. Try
- to resolve the device name by other means. */
+ if (i)
+ msleep(1000);
+ wait_for_device_probe();
+
+ devt = name_to_dev_t(devname);
+ if (!devt)
+ continue;
- dev_t devt = name_to_dev_t(devname);
- if (devt)
- bdev = blkdev_get_by_dev(devt, mode, dev);
+ bdev = blkdev_get_by_dev(devt, mode, dev);
}
#endif
@@ -355,11 +362,12 @@ static char block2mtd_paramline[80 + 12]
static int block2mtd_setup2(const char *val)
{
- char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
+ char buf[80 + 12 + 80 + 8]; /* 80 for device, 12 for erase size, 80 for name, 8 for timeout */
char *str = buf;
- char *token[3];
+ char *token[4];
char *name;
size_t erase_size = PAGE_SIZE;
+ unsigned long timeout = 0;
int i, ret;
if (strnlen(val, sizeof(buf)) >= sizeof(buf)) {
@@ -370,7 +378,7 @@ static int block2mtd_setup2(const char *
strcpy(str, val);
kill_final_newline(str);
- for (i = 0; i < 3; i++)
+ for (i = 0; i < 4; i++)
token[i] = strsep(&str, ",");
if (str) {
@@ -399,7 +407,10 @@ static int block2mtd_setup2(const char *
if (token[2] && (strlen(token[2]) + 1 > 80))
pr_err("mtd device name too long\n");
- add_device(name, erase_size, token[2]);
+ if (token[3] && kstrtoul(token[3], 0, &timeout))
+ pr_err("invalid timeout\n");
+
+ add_device(name, erase_size, token[2], timeout);
return 0;
}
@@ -433,7 +444,7 @@ static int block2mtd_setup(const char *v
module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
-MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
+MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>[,<timeout>]]]\"");
static int __init block2mtd_init(void)
{
@@ -467,7 +478,7 @@ static void block2mtd_exit(void)
}
-module_init(block2mtd_init);
+late_initcall(block2mtd_init);
module_exit(block2mtd_exit);
MODULE_LICENSE("GPL");
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