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mtd: rawnand: fsl_elbc: fix probe function error path 

An error after nand_scan_tail() should trigger a nand_cleanup().
The helper mtd_device_parse_register() returns an error code that should
be checked and nand_cleanup() called accordingly.

However, in this driver, fsl_elbc_chip_remove() which is called upon
error already triggers a nand_release() which is wrong, because a
nand_release() should be triggered only if an mtd_register() succeeded.

Move the nand_release() call out of the fsl_elbc_chip_remove() and put
it back in the *_remove() hook.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Miquel Raynal 2018-04-21 20:00:34 +02:00 committed by Boris Brezillon
parent 87ed67ba65
commit 39b77c586e
1 changed files with 9 additions and 4 deletions
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13
drivers/mtd/nand/raw/fsl_elbc_nand.c
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@ -813,8 +813,6 @@ static int fsl_elbc_chip_remove(struct fsl_elbc_mtd *priv)
struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
struct mtd_info *mtd = nand_to_mtd(&priv->chip);
nand_release(mtd);
kfree(mtd->name);
if (priv->vbase)
@ -926,15 +924,20 @@ static int fsl_elbc_nand_probe(struct platform_device *pdev)
/* First look for RedBoot table or partitions on the command
* line, these take precedence over device tree information */
mtd_device_parse_register(mtd, part_probe_types, NULL,
NULL, 0);
ret = mtd_device_parse_register(mtd, part_probe_types, NULL, NULL, 0);
if (ret)
goto cleanup_nand;
pr_info("eLBC NAND device at 0x%llx, bank %d\n",
(unsigned long long)res.start, priv->bank);
return 0;
cleanup_nand:
nand_cleanup(&priv->chip);
err:
fsl_elbc_chip_remove(priv);
return ret;
}
@ -942,7 +945,9 @@ static int fsl_elbc_nand_remove(struct platform_device *pdev)
{
struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = fsl_lbc_ctrl_dev->nand;
struct fsl_elbc_mtd *priv = dev_get_drvdata(&pdev->dev);
struct mtd_info *mtd = nand_to_mtd(&priv->chip);
nand_release(mtd);
fsl_elbc_chip_remove(priv);
mutex_lock(&fsl_elbc_nand_mutex);