From b49e345e61a2e0c4decbe9b1bd670ed5599fac6e Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 28 Nov 2011 16:53:13 +0300 Subject: [PATCH] mtd: docg3: dereferencing an ERR_PTR() in docg3_probe() If doc_probe_device() returned an ERR_PTR, then we accidentally saved that to docg3_floors[floor] = mtd; which gets derefenced in the error handling when we call doc_release_device(). I've reworked the error handling to take care of that and hopefully make it a little simpler. Signed-off-by: Dan Carpenter Acked-by: Robert Jarzmik Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/devices/docg3.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c index d7df311..f7490a014 100644 --- a/drivers/mtd/devices/docg3.c +++ b/drivers/mtd/devices/docg3.c @@ -2027,21 +2027,24 @@ static int __init docg3_probe(struct platform_device *pdev) if (!docg3_bch) goto nomem2; - ret = 0; for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++) { mtd = doc_probe_device(base, floor, dev); - if (floor == 0 && !mtd) - goto notfound; - if (!IS_ERR_OR_NULL(mtd)) - ret = mtd_device_parse_register(mtd, part_probes, - NULL, NULL, 0); - else + if (IS_ERR(mtd)) { ret = PTR_ERR(mtd); + goto err_probe; + } + if (!mtd) { + if (floor == 0) + goto notfound; + else + continue; + } docg3_floors[floor] = mtd; + ret = mtd_device_parse_register(mtd, part_probes, NULL, NULL, + 0); if (ret) goto err_probe; - if (mtd) - found++; + found++; } ret = doc_register_sysfs(pdev, docg3_floors); -- 2.7.4