diff options
| author | Alan Cox <alan@redhat.com> | 2009-01-11 20:52:19 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-01-11 20:56:46 +0100 |
| commit | 5f877607cdfe8b60bf96fb96e527e0ce2a21e68b (patch) | |
| tree | 5e13766a4d7df3e7032b1b26e498099c04b06c16 | |
| parent | [MTD] [LPDDR] qinfo_probe depends on lpddr (diff) | |
| download | linux-5f877607cdfe8b60bf96fb96e527e0ce2a21e68b.tar.xz linux-5f877607cdfe8b60bf96fb96e527e0ce2a21e68b.zip | |
[MTD] map_rom has NULL erase pointer
Which means if inftl or similar are loaded with it (which is a dumb thing
to do admittedly) it may oops.
Closes #8108
[dwmw2: change error to -EROFS to match write-protected flash]
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| -rw-r--r-- | drivers/mtd/chips/map_rom.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c index 821d0ed6bae3..c76d6e5f47ee 100644 --- a/drivers/mtd/chips/map_rom.c +++ b/drivers/mtd/chips/map_rom.c @@ -19,6 +19,7 @@ static int maprom_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int maprom_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *); static void maprom_nop (struct mtd_info *); static struct mtd_info *map_rom_probe(struct map_info *map); +static int maprom_erase (struct mtd_info *mtd, struct erase_info *info); static struct mtd_chip_driver maprom_chipdrv = { .probe = map_rom_probe, @@ -42,6 +43,7 @@ static struct mtd_info *map_rom_probe(struct map_info *map) mtd->read = maprom_read; mtd->write = maprom_write; mtd->sync = maprom_nop; + mtd->erase = maprom_erase; mtd->flags = MTD_CAP_ROM; mtd->erasesize = map->size; mtd->writesize = 1; @@ -71,6 +73,12 @@ static int maprom_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *re return -EIO; } +static int maprom_erase (struct mtd_info *mtd, struct erase_info *info) +{ + /* We do our best 8) */ + return -EROFS; +} + static int __init map_rom_init(void) { register_mtd_chip_driver(&maprom_chipdrv); |