From 3e00ed0e984bbec47f5e531bad3cf36885aa5d83 Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Mon, 1 Jun 2015 16:17:19 -0700 Subject: [PATCH] mtd: fixup corner case error handling in mtd_device_parse_register() Since commit 3efe41be224c ("mtd: implement common reboot notifier boilerplate"), we might try to register a reboot notifier for an MTD that failed to register. Let's avoid this by making the error path clearer. Signed-off-by: Brian Norris Reviewed-by: Richard Weinberger --- drivers/mtd/mtdcore.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index bbcba0dbd5c3..a2e76ac9f1dc 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -588,9 +588,15 @@ int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types, else ret = nr_parts; } + /* Didn't come up with either parsed OR fallback partitions */ + if (ret < 0) { + pr_info("mtd: failed to find partitions\n"); + goto out; + } - if (ret >= 0) - ret = mtd_add_device_partitions(mtd, real_parts, ret); + ret = mtd_add_device_partitions(mtd, real_parts, ret); + if (ret) + goto out; /* * FIXME: some drivers unfortunately call this function more than once. @@ -605,6 +611,7 @@ int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types, register_reboot_notifier(&mtd->reboot_notifier); } +out: kfree(real_parts); return ret; } -- 2.30.2