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| author | H Hartley Sweeten <hartleys@visionengravers.com> | 2009-10-20 12:23:33 -0400 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-10-21 06:29:27 +0900 |
| commit | 8ce110ac19bc88b82e3feacfbb3a2ee08a07fe22 (patch) | |
| tree | 942c3de936655fb78a9e356a4cea6b056687c7da /drivers/mtd/maps | |
| parent | 1cc523999e0acd0c21f83bf89b7a44b4ab6f7bd8 (diff) | |
| download | linux-3.10-8ce110ac19bc88b82e3feacfbb3a2ee08a07fe22.tar.gz linux-3.10-8ce110ac19bc88b82e3feacfbb3a2ee08a07fe22.tar.bz2 linux-3.10-8ce110ac19bc88b82e3feacfbb3a2ee08a07fe22.zip | |
mtd: Fix compile failure and error path in physmap.c
Commit 4b56ffcacee937a85bf39e14872dd141e23ee85f ("mtd: Fix kernel NULL
pointer dereference in physmap.c") introduced a couple of bugs.
It neglected to run the loop of map_destroy() calls in
physmap_flash_remove(), if !info->cmtd, which would happen if that
function was called to clean up errors during probe.
It also failed to compile if CONFIG_MTD_PARTITIONS was not defined.
Reported-By: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/maps')
| -rw-r--r-- | drivers/mtd/maps/physmap.c | 44 |
1 files changed, 21 insertions, 23 deletions
diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c index 65f52d4804a..3f13a9673e7 100644 --- a/drivers/mtd/maps/physmap.c +++ b/drivers/mtd/maps/physmap.c @@ -44,12 +44,10 @@ static int physmap_flash_remove(struct platform_device *dev) return 0; platform_set_drvdata(dev, NULL); - if (info->cmtd == NULL) - return 0; - physmap_data = dev->dev.platform_data; - if (mtd_has_partitions()) { + if (info->cmtd) { +#ifdef CONFIG_MTD_PARTITIONS if (info->nr_parts || physmap_data->nr_parts) { del_mtd_partitions(info->cmtd); @@ -58,14 +56,14 @@ static int physmap_flash_remove(struct platform_device *dev) } else { del_mtd_device(info->cmtd); } - } else { +#else del_mtd_device(info->cmtd); - } - +#endif #ifdef CONFIG_MTD_CONCAT - if (info->cmtd != info->mtd[0]) - mtd_concat_destroy(info->cmtd); + if (info->cmtd != info->mtd[0]) + mtd_concat_destroy(info->cmtd); #endif + } for (i = 0; i < MAX_RESOURCES; i++) { if (info->mtd[i] != NULL) @@ -170,22 +168,22 @@ static int physmap_flash_probe(struct platform_device *dev) if (err) goto err_out; - if (mtd_has_partitions()) { - err = parse_mtd_partitions(info->cmtd, part_probe_types, - &info->parts, 0); - if (err > 0) { - add_mtd_partitions(info->cmtd, info->parts, err); - info->nr_parts = err; - return 0; - } +#ifdef CONFIG_MTD_PARTITIONS + err = parse_mtd_partitions(info->cmtd, part_probe_types, + &info->parts, 0); + if (err > 0) { + add_mtd_partitions(info->cmtd, info->parts, err); + info->nr_parts = err; + return 0; + } - if (physmap_data->nr_parts) { - printk(KERN_NOTICE "Using physmap partition information\n"); - add_mtd_partitions(info->cmtd, physmap_data->parts, - physmap_data->nr_parts); - return 0; - } + if (physmap_data->nr_parts) { + printk(KERN_NOTICE "Using physmap partition information\n"); + add_mtd_partitions(info->cmtd, physmap_data->parts, + physmap_data->nr_parts); + return 0; } +#endif add_mtd_device(info->cmtd); return 0; |