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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.patch110
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");