diff options
Diffstat (limited to 'target/linux/generic/pending-3.18/441-block2mtd_probe.patch')
| -rw-r--r-- | target/linux/generic/pending-3.18/441-block2mtd_probe.patch | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/target/linux/generic/pending-3.18/441-block2mtd_probe.patch b/target/linux/generic/pending-3.18/441-block2mtd_probe.patch new file mode 100644 index 0000000000..6836a48e39 --- /dev/null +++ b/target/linux/generic/pending-3.18/441-block2mtd_probe.patch @@ -0,0 +1,110 @@ +--- 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> +@@ -210,13 +211,16 @@ static void block2mtd_free_device(struct + } + + +-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; ++#ifndef MODULE ++ int i; ++#endif + + if (!devname) + return NULL; +@@ -227,15 +231,20 @@ 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 + +@@ -361,11 +370,12 @@ 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)) { +@@ -376,7 +386,7 @@ 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) { +@@ -405,7 +415,10 @@ 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; + } +@@ -439,7 +452,7 @@ 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) + { +@@ -474,7 +487,7 @@ static void block2mtd_exit(void) + } + + +-module_init(block2mtd_init); ++late_initcall(block2mtd_init); + module_exit(block2mtd_exit); + + MODULE_LICENSE("GPL"); |