diff options
| -rw-r--r-- | drivers/mtd/ubi/debug.c | 32 | ||||
| -rw-r--r-- | drivers/mtd/ubi/debug.h | 2 | ||||
| -rw-r--r-- | drivers/mtd/ubi/io.c | 1 |
3 files changed, 35 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c index 54b0186915fb..4876977e52cb 100644 --- a/drivers/mtd/ubi/debug.c +++ b/drivers/mtd/ubi/debug.c @@ -196,4 +196,36 @@ void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req) printk(KERN_DEBUG "\t1st 16 characters of name: %s\n", nm); } +/** + * ubi_dbg_dump_flash - dump a region of flash. + * @ubi: UBI device description object + * @pnum: the physical eraseblock number to dump + * @offset: the starting offset within the physical eraseblock to dump + * @len: the length of the region to dump + */ +void ubi_dbg_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len) +{ + int err; + size_t read; + void *buf; + loff_t addr = (loff_t)pnum * ubi->peb_size + offset; + + buf = vmalloc(len); + if (!buf) + return; + err = ubi->mtd->read(ubi->mtd, addr, len, &read, buf); + if (err && err != -EUCLEAN) { + ubi_err("error %d while reading %d bytes from PEB %d:%d, " + "read %zd bytes", err, len, pnum, offset, read); + goto out; + } + + dbg_msg("dumping %d bytes of data from PEB %d, offset %d", + len, pnum, offset); + print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1); +out: + vfree(buf); + return; +} + #endif /* CONFIG_MTD_UBI_DEBUG */ diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h index a4da7a09b949..f30bcb372c05 100644 --- a/drivers/mtd/ubi/debug.h +++ b/drivers/mtd/ubi/debug.h @@ -55,6 +55,7 @@ void ubi_dbg_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx); void ubi_dbg_dump_sv(const struct ubi_scan_volume *sv); void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb, int type); void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req); +void ubi_dbg_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len); #ifdef CONFIG_MTD_UBI_DEBUG_MSG /* General debugging messages */ @@ -167,6 +168,7 @@ static inline int ubi_dbg_is_erase_failure(void) #define ubi_dbg_dump_sv(sv) ({}) #define ubi_dbg_dump_seb(seb, type) ({}) #define ubi_dbg_dump_mkvol_req(req) ({}) +#define ubi_dbg_dump_flash(ubi, pnum, offset, len) ({}) #define UBI_IO_DEBUG 0 #define DBG_DISABLE_BGT 0 diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c index 4e7bcb215075..b693138fc519 100644 --- a/drivers/mtd/ubi/io.c +++ b/drivers/mtd/ubi/io.c @@ -269,6 +269,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset, ubi_err("error %d while writing %d bytes to PEB %d:%d, written " "%zd bytes", err, len, pnum, offset, written); ubi_dbg_dump_stack(); + ubi_dbg_dump_flash(ubi, pnum, offset, len); } else ubi_assert(written == len); |