110 lines
3 KiB
Diff
110 lines
3 KiB
Diff
--- a/drivers/mtd/devices/block2mtd.c
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+++ b/drivers/mtd/devices/block2mtd.c
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@@ -10,6 +10,7 @@
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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+#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/blkdev.h>
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#include <linux/bio.h>
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@@ -210,13 +211,16 @@ static void block2mtd_free_device(struct
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}
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-static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname)
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+static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname, int timeout)
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{
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const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL;
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- struct block_device *bdev;
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+ struct block_device *bdev = ERR_PTR(-ENODEV);
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struct block2mtd_dev *dev;
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struct mtd_partition *part;
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char *name;
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+#ifndef MODULE
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+ int i;
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+#endif
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if (!devname)
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return NULL;
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@@ -227,15 +231,20 @@ static struct block2mtd_dev *add_device(
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/* Get a handle on the device */
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bdev = blkdev_get_by_path(devname, mode, dev);
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+
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#ifndef MODULE
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- if (IS_ERR(bdev)) {
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+ for (i = 0; IS_ERR(bdev) && i <= timeout; i++) {
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+ dev_t devt;
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- /* We might not have rootfs mounted at this point. Try
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- to resolve the device name by other means. */
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+ if (i)
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+ msleep(1000);
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+ wait_for_device_probe();
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+
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+ devt = name_to_dev_t(devname);
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+ if (!devt)
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+ continue;
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- dev_t devt = name_to_dev_t(devname);
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- if (devt)
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- bdev = blkdev_get_by_dev(devt, mode, dev);
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+ bdev = blkdev_get_by_dev(devt, mode, dev);
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}
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#endif
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@@ -361,11 +370,12 @@ static char block2mtd_paramline[80 + 12]
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static int block2mtd_setup2(const char *val)
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{
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- char buf[80 + 12 + 80]; /* 80 for device, 12 for erase size, 80 for name */
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+ char buf[80 + 12 + 80 + 8]; /* 80 for device, 12 for erase size, 80 for name, 8 for timeout */
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char *str = buf;
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- char *token[3];
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+ char *token[4];
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char *name;
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size_t erase_size = PAGE_SIZE;
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+ unsigned long timeout = 0;
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int i, ret;
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if (strnlen(val, sizeof(buf)) >= sizeof(buf)) {
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@@ -376,7 +386,7 @@ static int block2mtd_setup2(const char *
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strcpy(str, val);
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kill_final_newline(str);
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- for (i = 0; i < 3; i++)
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+ for (i = 0; i < 4; i++)
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token[i] = strsep(&str, ",");
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if (str) {
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@@ -405,7 +415,10 @@ static int block2mtd_setup2(const char *
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if (token[2] && (strlen(token[2]) + 1 > 80))
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pr_err("mtd device name too long\n");
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- add_device(name, erase_size, token[2]);
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+ if (token[3] && kstrtoul(token[3], 0, &timeout))
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+ pr_err("invalid timeout\n");
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+
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+ add_device(name, erase_size, token[2], timeout);
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return 0;
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}
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@@ -439,7 +452,7 @@ static int block2mtd_setup(const char *v
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module_param_call(block2mtd, block2mtd_setup, NULL, NULL, 0200);
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-MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>]]\"");
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+MODULE_PARM_DESC(block2mtd, "Device to use. \"block2mtd=<dev>[,<erasesize>[,<name>[,<timeout>]]]\"");
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static int __init block2mtd_init(void)
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{
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@@ -474,7 +487,7 @@ static void block2mtd_exit(void)
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}
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-module_init(block2mtd_init);
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+late_initcall(block2mtd_init);
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module_exit(block2mtd_exit);
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MODULE_LICENSE("GPL");
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