From 39b77c586e179db03d8cdbc448d4a0fc22f8b13a Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Sat, 21 Apr 2018 20:00:34 +0200 Subject: [PATCH] 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 Signed-off-by: Boris Brezillon --- drivers/mtd/nand/raw/fsl_elbc_nand.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/nand/raw/fsl_elbc_nand.c b/drivers/mtd/nand/raw/fsl_elbc_nand.c index d28df991c73c..51f0b340bc0d 100644 --- a/drivers/mtd/nand/raw/fsl_elbc_nand.c +++ b/drivers/mtd/nand/raw/fsl_elbc_nand.c @@ -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); -- 2.45.2