diff options
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/mtd/ubi/attach.c | 4 | ||||
| -rw-r--r-- | drivers/mtd/ubi/build.c | 4 | ||||
| -rw-r--r-- | drivers/mtd/ubi/io.c | 54 |
4 files changed, 29 insertions, 35 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index b5795f031b3e..5f840aeab64d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8960,7 +8960,7 @@ UNSORTED BLOCK IMAGES (UBI) M: Artem Bityutskiy <dedekind1@gmail.com> W: http://www.linux-mtd.infradead.org/ L: linux-mtd@lists.infradead.org -T: git git://git.infradead.org/ubi-2.6.git +T: git git://git.infradead.org/ubifs-2.6.git S: Maintained F: drivers/mtd/ubi/ F: include/linux/mtd/ubi.h diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c index 33bb1f2b63e4..6f27d9a1be3b 100644 --- a/drivers/mtd/ubi/attach.c +++ b/drivers/mtd/ubi/attach.c @@ -1453,8 +1453,10 @@ int ubi_attach(struct ubi_device *ubi, int force_scan) struct ubi_attach_info *scan_ai; scan_ai = alloc_ai("ubi_ckh_aeb_slab_cache"); - if (!scan_ai) + if (!scan_ai) { + err = -ENOMEM; goto out_wl; + } err = scan_all(ubi, scan_ai, 0); if (err) { diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index e05dc6298c1d..57deae961429 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -1245,8 +1245,10 @@ static int __init ubi_init(void) ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab", sizeof(struct ubi_wl_entry), 0, 0, NULL); - if (!ubi_wl_entry_slab) + if (!ubi_wl_entry_slab) { + err = -ENOMEM; goto out_dev_unreg; + } err = ubi_debugfs_init(); if (err) diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c index bf79def40126..d36134925d31 100644 --- a/drivers/mtd/ubi/io.c +++ b/drivers/mtd/ubi/io.c @@ -495,10 +495,12 @@ out: */ static int nor_erase_prepare(struct ubi_device *ubi, int pnum) { - int err, err1; + int err; size_t written; loff_t addr; uint32_t data = 0; + struct ubi_ec_hdr ec_hdr; + /* * Note, we cannot generally define VID header buffers on stack, * because of the way we deal with these buffers (see the header @@ -509,50 +511,38 @@ static int nor_erase_prepare(struct ubi_device *ubi, int pnum) struct ubi_vid_hdr vid_hdr; /* + * If VID or EC is valid, we have to corrupt them before erasing. * It is important to first invalidate the EC header, and then the VID * header. Otherwise a power cut may lead to valid EC header and * invalid VID header, in which case UBI will treat this PEB as * corrupted and will try to preserve it, and print scary warnings. */ addr = (loff_t)pnum * ubi->peb_size; - err = mtd_write(ubi->mtd, addr, 4, &written, (void *)&data); - if (!err) { - addr += ubi->vid_hdr_aloffset; + err = ubi_io_read_ec_hdr(ubi, pnum, &ec_hdr, 0); + if (err != UBI_IO_BAD_HDR_EBADMSG && err != UBI_IO_BAD_HDR && + err != UBI_IO_FF){ err = mtd_write(ubi->mtd, addr, 4, &written, (void *)&data); - if (!err) - return 0; + if(err) + goto error; } - /* - * We failed to write to the media. This was observed with Spansion - * S29GL512N NOR flash. Most probably the previously eraseblock erasure - * was interrupted at a very inappropriate moment, so it became - * unwritable. In this case we probably anyway have garbage in this - * PEB. - */ - err1 = ubi_io_read_vid_hdr(ubi, pnum, &vid_hdr, 0); - if (err1 == UBI_IO_BAD_HDR_EBADMSG || err1 == UBI_IO_BAD_HDR || - err1 == UBI_IO_FF) { - struct ubi_ec_hdr ec_hdr; - - err1 = ubi_io_read_ec_hdr(ubi, pnum, &ec_hdr, 0); - if (err1 == UBI_IO_BAD_HDR_EBADMSG || err1 == UBI_IO_BAD_HDR || - err1 == UBI_IO_FF) - /* - * Both VID and EC headers are corrupted, so we can - * safely erase this PEB and not afraid that it will be - * treated as a valid PEB in case of an unclean reboot. - */ - return 0; + err = ubi_io_read_vid_hdr(ubi, pnum, &vid_hdr, 0); + if (err != UBI_IO_BAD_HDR_EBADMSG && err != UBI_IO_BAD_HDR && + err != UBI_IO_FF){ + addr += ubi->vid_hdr_aloffset; + err = mtd_write(ubi->mtd, addr, 4, &written, (void *)&data); + if (err) + goto error; } + return 0; +error: /* - * The PEB contains a valid VID header, but we cannot invalidate it. - * Supposedly the flash media or the driver is screwed up, so return an - * error. + * The PEB contains a valid VID or EC header, but we cannot invalidate + * it. Supposedly the flash media or the driver is screwed up, so + * return an error. */ - ubi_err("cannot invalidate PEB %d, write returned %d read returned %d", - pnum, err, err1); + ubi_err("cannot invalidate PEB %d, write returned %d", pnum, err); ubi_dump_flash(ubi, pnum, 0, ubi->peb_size); return -EIO; } |