[MTD] [NAND] fsl_elbc_nand: fix mtd name

Currently fsl_elbc_nand doesn't initialize mtd->name, and this causes
nand_get_flash_type() to assign name that is equal to chip type, like
this:

   root@b1:~# cat /proc/mtd
   dev:    size   erasesize  name
   mtd0: 00800000 00010000 "fe000000.flash"
   mtd1: 02000000 00004000 "NAND 32MiB 3,3V 8-bit"

mtd0 is physmap_of flash (normal name), and mtd1 is fsl_elbc_nand.

Despite inconsistency, with mtd name like this specifying paritions
from the kernel command line becomes a torture (though, I didn't tried
and not sure if mtdparts= can handle spaces at all). Plus, this causes
real bugs when multiple fsl_elbc_nand chips registered.

With this patch applied fsl_elbc_nand chip will have proper name:

   root@b1:~# cat /proc/mtd
   dev:    size   erasesize  name
   mtd0: 00800000 00010000 "fe000000.flash"
   mtd1: 02000000 00004000 "e0600000.flash"

p.s. We can't use priv->dev->bus_id as in physmap_of, because
fsl_elbc_nand pretends to be a localbus controller, so its bus_id is
"address.localbus", which is incorrect and thus will also not work
for multiple chips.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index b9f9f22..cb12b67 100644 (file)
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -780,6 +780,8 @@ static int fsl_elbc_chip_remove(struct fsl_elbc_mtd *priv)
 
        nand_release(&priv->mtd);
 
+       kfree(priv->mtd.name);
+
        if (priv->vbase)
                iounmap(priv->vbase);
 
@@ -840,6 +842,12 @@ static int fsl_elbc_chip_probe(struct fsl_elbc_ctrl *ctrl,
                goto err;
        }
 
+       priv->mtd.name = kasprintf(GFP_KERNEL, "%x.flash", res.start);
+       if (!priv->mtd.name) {
+               ret = -ENOMEM;
+               goto err;
+       }
+
        ret = fsl_elbc_chip_init(priv);
        if (ret)
                goto err;