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| author | Thomas Gleixner <tglx@cruncher.tec.linutronix.de> | 2006-05-29 14:56:39 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@cruncher.tec.linutronix.de> | 2006-05-29 15:06:51 +0200 |
| commit | 9a1fcdfd4bee27c418424cac47abf7c049541297 (patch) | |
| tree | 5baa5f1e1d1a296a319bf6a5a4b636668c107e00 /drivers/mtd/mtdchar.c | |
| parent | 8593fbc68b0df1168995de76d1af38eb62fd6b62 (diff) | |
| download | linux-9a1fcdfd4bee27c418424cac47abf7c049541297.tar.bz2 | |
[MTD] NAND Signal that a bitflip was corrected by ECC
Return -EUCLEAN on read when a bitflip was detected and corrected, so the
clients can react and eventually copy the affected block to a spare one.
Make all in kernel users aware of the change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/mtd/mtdchar.c')
| -rw-r--r-- | drivers/mtd/mtdchar.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 7522fc3a2827..a48210d58b92 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -199,10 +199,13 @@ static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t /* Nand returns -EBADMSG on ecc errors, but it returns * the data. For our userspace tools it is important * to dump areas with ecc errors ! + * For kernel internal usage it also might return -EUCLEAN + * to signal the caller that a bitflip has occured and has + * been corrected by the ECC algorithm. * Userspace software which accesses NAND this way * must be aware of the fact that it deals with NAND */ - if (!ret || (ret == -EBADMSG)) { + if (!ret || (ret == -EUCLEAN) || (ret == -EBADMSG)) { *ppos += retlen; if (copy_to_user(buf, kbuf, retlen)) { kfree(kbuf); |