| /* |
| * Copyright (C) 2006-2008 Nokia Corporation |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published by |
| * the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; see the file COPYING. If not, write to the Free Software |
| * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| * |
| * Test OOB read and write on MTD device. |
| * |
| * Author: Adrian Hunter <ext-adrian.hunter@nokia.com> |
| */ |
| |
| #include <asm/div64.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/err.h> |
| #include <linux/mtd/mtd.h> |
| #include <linux/slab.h> |
| #include <linux/sched.h> |
| |
| #define PRINT_PREF KERN_INFO "mtd_oobtest: " |
| |
| static int dev = -EINVAL; |
| module_param(dev, int, S_IRUGO); |
| MODULE_PARM_DESC(dev, "MTD device number to use"); |
| |
| static struct mtd_info *mtd; |
| static unsigned char *readbuf; |
| static unsigned char *writebuf; |
| static unsigned char *bbt; |
| |
| static int ebcnt; |
| static int pgcnt; |
| static int errcnt; |
| static int use_offset; |
| static int use_len; |
| static int use_len_max; |
| static int vary_offset; |
| static unsigned long next = 1; |
| |
| static inline unsigned int simple_rand(void) |
| { |
| next = next * 1103515245 + 12345; |
| return (unsigned int)((next / 65536) % 32768); |
| } |
| |
| static inline void simple_srand(unsigned long seed) |
| { |
| next = seed; |
| } |
| |
| static void set_random_data(unsigned char *buf, size_t len) |
| { |
| size_t i; |
| |
| for (i = 0; i < len; ++i) |
| buf[i] = simple_rand(); |
| } |
| |
| static int erase_eraseblock(int ebnum) |
| { |
| int err; |
| struct erase_info ei; |
| loff_t addr = ebnum * mtd->erasesize; |
| |
| memset(&ei, 0, sizeof(struct erase_info)); |
| ei.mtd = mtd; |
| ei.addr = addr; |
| ei.len = mtd->erasesize; |
| |
| err = mtd->erase(mtd, &ei); |
| if (err) { |
| printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum); |
| return err; |
| } |
| |
| if (ei.state == MTD_ERASE_FAILED) { |
| printk(PRINT_PREF "some erase error occurred at EB %d\n", |
| ebnum); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static int erase_whole_device(void) |
| { |
| int err; |
| unsigned int i; |
| |
| printk(PRINT_PREF "erasing whole device\n"); |
| for (i = 0; i < ebcnt; ++i) { |
| if (bbt[i]) |
| continue; |
| err = erase_eraseblock(i); |
| if (err) |
| return err; |
| cond_resched(); |
| } |
| printk(PRINT_PREF "erased %u eraseblocks\n", i); |
| return 0; |
| } |
| |
| static void do_vary_offset(void) |
| { |
| use_len -= 1; |
| if (use_len < 1) { |
| use_offset += 1; |
| if (use_offset >= use_len_max) |
| use_offset = 0; |
| use_len = use_len_max - use_offset; |
| } |
| } |
| |
| static int write_eraseblock(int ebnum) |
| { |
| int i; |
| struct mtd_oob_ops ops; |
| int err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| |
| for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { |
| set_random_data(writebuf, use_len); |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = use_len; |
| ops.oobretlen = 0; |
| ops.ooboffs = use_offset; |
| ops.datbuf = NULL; |
| ops.oobbuf = writebuf; |
| err = mtd->write_oob(mtd, addr, &ops); |
| if (err || ops.oobretlen != use_len) { |
| printk(PRINT_PREF "error: writeoob failed at %#llx\n", |
| (long long)addr); |
| printk(PRINT_PREF "error: use_len %d, use_offset %d\n", |
| use_len, use_offset); |
| errcnt += 1; |
| return err ? err : -1; |
| } |
| if (vary_offset) |
| do_vary_offset(); |
| } |
| |
| return err; |
| } |
| |
| static int write_whole_device(void) |
| { |
| int err; |
| unsigned int i; |
| |
| printk(PRINT_PREF "writing OOBs of whole device\n"); |
| for (i = 0; i < ebcnt; ++i) { |
| if (bbt[i]) |
| continue; |
| err = write_eraseblock(i); |
| if (err) |
| return err; |
| if (i % 256 == 0) |
| printk(PRINT_PREF "written up to eraseblock %u\n", i); |
| cond_resched(); |
| } |
| printk(PRINT_PREF "written %u eraseblocks\n", i); |
| return 0; |
| } |
| |
| static int verify_eraseblock(int ebnum) |
| { |
| int i; |
| struct mtd_oob_ops ops; |
| int err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| |
| for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) { |
| set_random_data(writebuf, use_len); |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = use_len; |
| ops.oobretlen = 0; |
| ops.ooboffs = use_offset; |
| ops.datbuf = NULL; |
| ops.oobbuf = readbuf; |
| err = mtd->read_oob(mtd, addr, &ops); |
| if (err || ops.oobretlen != use_len) { |
| printk(PRINT_PREF "error: readoob failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| return err ? err : -1; |
| } |
| if (memcmp(readbuf, writebuf, use_len)) { |
| printk(PRINT_PREF "error: verify failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| if (errcnt > 1000) { |
| printk(PRINT_PREF "error: too many errors\n"); |
| return -1; |
| } |
| } |
| if (use_offset != 0 || use_len < mtd->ecclayout->oobavail) { |
| int k; |
| |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = mtd->ecclayout->oobavail; |
| ops.oobretlen = 0; |
| ops.ooboffs = 0; |
| ops.datbuf = NULL; |
| ops.oobbuf = readbuf; |
| err = mtd->read_oob(mtd, addr, &ops); |
| if (err || ops.oobretlen != mtd->ecclayout->oobavail) { |
| printk(PRINT_PREF "error: readoob failed at " |
| "%#llx\n", (long long)addr); |
| errcnt += 1; |
| return err ? err : -1; |
| } |
| if (memcmp(readbuf + use_offset, writebuf, use_len)) { |
| printk(PRINT_PREF "error: verify failed at " |
| "%#llx\n", (long long)addr); |
| errcnt += 1; |
| if (errcnt > 1000) { |
| printk(PRINT_PREF "error: too many " |
| "errors\n"); |
| return -1; |
| } |
| } |
| for (k = 0; k < use_offset; ++k) |
| if (readbuf[k] != 0xff) { |
| printk(PRINT_PREF "error: verify 0xff " |
| "failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| if (errcnt > 1000) { |
| printk(PRINT_PREF "error: too " |
| "many errors\n"); |
| return -1; |
| } |
| } |
| for (k = use_offset + use_len; |
| k < mtd->ecclayout->oobavail; ++k) |
| if (readbuf[k] != 0xff) { |
| printk(PRINT_PREF "error: verify 0xff " |
| "failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| if (errcnt > 1000) { |
| printk(PRINT_PREF "error: too " |
| "many errors\n"); |
| return -1; |
| } |
| } |
| } |
| if (vary_offset) |
| do_vary_offset(); |
| } |
| return err; |
| } |
| |
| static int verify_eraseblock_in_one_go(int ebnum) |
| { |
| struct mtd_oob_ops ops; |
| int err = 0; |
| loff_t addr = ebnum * mtd->erasesize; |
| size_t len = mtd->ecclayout->oobavail * pgcnt; |
| |
| set_random_data(writebuf, len); |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = len; |
| ops.oobretlen = 0; |
| ops.ooboffs = 0; |
| ops.datbuf = NULL; |
| ops.oobbuf = readbuf; |
| err = mtd->read_oob(mtd, addr, &ops); |
| if (err || ops.oobretlen != len) { |
| printk(PRINT_PREF "error: readoob failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| return err ? err : -1; |
| } |
| if (memcmp(readbuf, writebuf, len)) { |
| printk(PRINT_PREF "error: verify failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| if (errcnt > 1000) { |
| printk(PRINT_PREF "error: too many errors\n"); |
| return -1; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int verify_all_eraseblocks(void) |
| { |
| int err; |
| unsigned int i; |
| |
| printk(PRINT_PREF "verifying all eraseblocks\n"); |
| for (i = 0; i < ebcnt; ++i) { |
| if (bbt[i]) |
| continue; |
| err = verify_eraseblock(i); |
| if (err) |
| return err; |
| if (i % 256 == 0) |
| printk(PRINT_PREF "verified up to eraseblock %u\n", i); |
| cond_resched(); |
| } |
| printk(PRINT_PREF "verified %u eraseblocks\n", i); |
| return 0; |
| } |
| |
| static int is_block_bad(int ebnum) |
| { |
| int ret; |
| loff_t addr = ebnum * mtd->erasesize; |
| |
| ret = mtd->block_isbad(mtd, addr); |
| if (ret) |
| printk(PRINT_PREF "block %d is bad\n", ebnum); |
| return ret; |
| } |
| |
| static int scan_for_bad_eraseblocks(void) |
| { |
| int i, bad = 0; |
| |
| bbt = kmalloc(ebcnt, GFP_KERNEL); |
| if (!bbt) { |
| printk(PRINT_PREF "error: cannot allocate memory\n"); |
| return -ENOMEM; |
| } |
| |
| printk(PRINT_PREF "scanning for bad eraseblocks\n"); |
| for (i = 0; i < ebcnt; ++i) { |
| bbt[i] = is_block_bad(i) ? 1 : 0; |
| if (bbt[i]) |
| bad += 1; |
| cond_resched(); |
| } |
| printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad); |
| return 0; |
| } |
| |
| static int __init mtd_oobtest_init(void) |
| { |
| int err = 0; |
| unsigned int i; |
| uint64_t tmp; |
| struct mtd_oob_ops ops; |
| loff_t addr = 0, addr0; |
| |
| printk(KERN_INFO "\n"); |
| printk(KERN_INFO "=================================================\n"); |
| |
| if (dev < 0) { |
| printk(PRINT_PREF "Please specify a valid mtd-device via module paramter\n"); |
| printk(KERN_CRIT "CAREFUL: This test wipes all data on the specified MTD device!\n"); |
| return -EINVAL; |
| } |
| |
| printk(PRINT_PREF "MTD device: %d\n", dev); |
| |
| mtd = get_mtd_device(NULL, dev); |
| if (IS_ERR(mtd)) { |
| err = PTR_ERR(mtd); |
| printk(PRINT_PREF "error: cannot get MTD device\n"); |
| return err; |
| } |
| |
| if (mtd->type != MTD_NANDFLASH) { |
| printk(PRINT_PREF "this test requires NAND flash\n"); |
| goto out; |
| } |
| |
| tmp = mtd->size; |
| do_div(tmp, mtd->erasesize); |
| ebcnt = tmp; |
| pgcnt = mtd->erasesize / mtd->writesize; |
| |
| printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, " |
| "page size %u, count of eraseblocks %u, pages per " |
| "eraseblock %u, OOB size %u\n", |
| (unsigned long long)mtd->size, mtd->erasesize, |
| mtd->writesize, ebcnt, pgcnt, mtd->oobsize); |
| |
| err = -ENOMEM; |
| readbuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
| if (!readbuf) { |
| printk(PRINT_PREF "error: cannot allocate memory\n"); |
| goto out; |
| } |
| writebuf = kmalloc(mtd->erasesize, GFP_KERNEL); |
| if (!writebuf) { |
| printk(PRINT_PREF "error: cannot allocate memory\n"); |
| goto out; |
| } |
| |
| err = scan_for_bad_eraseblocks(); |
| if (err) |
| goto out; |
| |
| use_offset = 0; |
| use_len = mtd->ecclayout->oobavail; |
| use_len_max = mtd->ecclayout->oobavail; |
| vary_offset = 0; |
| |
| /* First test: write all OOB, read it back and verify */ |
| printk(PRINT_PREF "test 1 of 5\n"); |
| |
| err = erase_whole_device(); |
| if (err) |
| goto out; |
| |
| simple_srand(1); |
| err = write_whole_device(); |
| if (err) |
| goto out; |
| |
| simple_srand(1); |
| err = verify_all_eraseblocks(); |
| if (err) |
| goto out; |
| |
| /* |
| * Second test: write all OOB, a block at a time, read it back and |
| * verify. |
| */ |
| printk(PRINT_PREF "test 2 of 5\n"); |
| |
| err = erase_whole_device(); |
| if (err) |
| goto out; |
| |
| simple_srand(3); |
| err = write_whole_device(); |
| if (err) |
| goto out; |
| |
| /* Check all eraseblocks */ |
| simple_srand(3); |
| printk(PRINT_PREF "verifying all eraseblocks\n"); |
| for (i = 0; i < ebcnt; ++i) { |
| if (bbt[i]) |
| continue; |
| err = verify_eraseblock_in_one_go(i); |
| if (err) |
| goto out; |
| if (i % 256 == 0) |
| printk(PRINT_PREF "verified up to eraseblock %u\n", i); |
| cond_resched(); |
| } |
| printk(PRINT_PREF "verified %u eraseblocks\n", i); |
| |
| /* |
| * Third test: write OOB at varying offsets and lengths, read it back |
| * and verify. |
| */ |
| printk(PRINT_PREF "test 3 of 5\n"); |
| |
| err = erase_whole_device(); |
| if (err) |
| goto out; |
| |
| /* Write all eraseblocks */ |
| use_offset = 0; |
| use_len = mtd->ecclayout->oobavail; |
| use_len_max = mtd->ecclayout->oobavail; |
| vary_offset = 1; |
| simple_srand(5); |
| |
| err = write_whole_device(); |
| if (err) |
| goto out; |
| |
| /* Check all eraseblocks */ |
| use_offset = 0; |
| use_len = mtd->ecclayout->oobavail; |
| use_len_max = mtd->ecclayout->oobavail; |
| vary_offset = 1; |
| simple_srand(5); |
| err = verify_all_eraseblocks(); |
| if (err) |
| goto out; |
| |
| use_offset = 0; |
| use_len = mtd->ecclayout->oobavail; |
| use_len_max = mtd->ecclayout->oobavail; |
| vary_offset = 0; |
| |
| /* Fourth test: try to write off end of device */ |
| printk(PRINT_PREF "test 4 of 5\n"); |
| |
| err = erase_whole_device(); |
| if (err) |
| goto out; |
| |
| addr0 = 0; |
| for (i = 0; i < ebcnt && bbt[i]; ++i) |
| addr0 += mtd->erasesize; |
| |
| /* Attempt to write off end of OOB */ |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = 1; |
| ops.oobretlen = 0; |
| ops.ooboffs = mtd->ecclayout->oobavail; |
| ops.datbuf = NULL; |
| ops.oobbuf = writebuf; |
| printk(PRINT_PREF "attempting to start write past end of OOB\n"); |
| printk(PRINT_PREF "an error is expected...\n"); |
| err = mtd->write_oob(mtd, addr0, &ops); |
| if (err) { |
| printk(PRINT_PREF "error occurred as expected\n"); |
| err = 0; |
| } else { |
| printk(PRINT_PREF "error: can write past end of OOB\n"); |
| errcnt += 1; |
| } |
| |
| /* Attempt to read off end of OOB */ |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = 1; |
| ops.oobretlen = 0; |
| ops.ooboffs = mtd->ecclayout->oobavail; |
| ops.datbuf = NULL; |
| ops.oobbuf = readbuf; |
| printk(PRINT_PREF "attempting to start read past end of OOB\n"); |
| printk(PRINT_PREF "an error is expected...\n"); |
| err = mtd->read_oob(mtd, addr0, &ops); |
| if (err) { |
| printk(PRINT_PREF "error occurred as expected\n"); |
| err = 0; |
| } else { |
| printk(PRINT_PREF "error: can read past end of OOB\n"); |
| errcnt += 1; |
| } |
| |
| if (bbt[ebcnt - 1]) |
| printk(PRINT_PREF "skipping end of device tests because last " |
| "block is bad\n"); |
| else { |
| /* Attempt to write off end of device */ |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = mtd->ecclayout->oobavail + 1; |
| ops.oobretlen = 0; |
| ops.ooboffs = 0; |
| ops.datbuf = NULL; |
| ops.oobbuf = writebuf; |
| printk(PRINT_PREF "attempting to write past end of device\n"); |
| printk(PRINT_PREF "an error is expected...\n"); |
| err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops); |
| if (err) { |
| printk(PRINT_PREF "error occurred as expected\n"); |
| err = 0; |
| } else { |
| printk(PRINT_PREF "error: wrote past end of device\n"); |
| errcnt += 1; |
| } |
| |
| /* Attempt to read off end of device */ |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = mtd->ecclayout->oobavail + 1; |
| ops.oobretlen = 0; |
| ops.ooboffs = 0; |
| ops.datbuf = NULL; |
| ops.oobbuf = readbuf; |
| printk(PRINT_PREF "attempting to read past end of device\n"); |
| printk(PRINT_PREF "an error is expected...\n"); |
| err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops); |
| if (err) { |
| printk(PRINT_PREF "error occurred as expected\n"); |
| err = 0; |
| } else { |
| printk(PRINT_PREF "error: read past end of device\n"); |
| errcnt += 1; |
| } |
| |
| err = erase_eraseblock(ebcnt - 1); |
| if (err) |
| goto out; |
| |
| /* Attempt to write off end of device */ |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = mtd->ecclayout->oobavail; |
| ops.oobretlen = 0; |
| ops.ooboffs = 1; |
| ops.datbuf = NULL; |
| ops.oobbuf = writebuf; |
| printk(PRINT_PREF "attempting to write past end of device\n"); |
| printk(PRINT_PREF "an error is expected...\n"); |
| err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops); |
| if (err) { |
| printk(PRINT_PREF "error occurred as expected\n"); |
| err = 0; |
| } else { |
| printk(PRINT_PREF "error: wrote past end of device\n"); |
| errcnt += 1; |
| } |
| |
| /* Attempt to read off end of device */ |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = mtd->ecclayout->oobavail; |
| ops.oobretlen = 0; |
| ops.ooboffs = 1; |
| ops.datbuf = NULL; |
| ops.oobbuf = readbuf; |
| printk(PRINT_PREF "attempting to read past end of device\n"); |
| printk(PRINT_PREF "an error is expected...\n"); |
| err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops); |
| if (err) { |
| printk(PRINT_PREF "error occurred as expected\n"); |
| err = 0; |
| } else { |
| printk(PRINT_PREF "error: read past end of device\n"); |
| errcnt += 1; |
| } |
| } |
| |
| /* Fifth test: write / read across block boundaries */ |
| printk(PRINT_PREF "test 5 of 5\n"); |
| |
| /* Erase all eraseblocks */ |
| err = erase_whole_device(); |
| if (err) |
| goto out; |
| |
| /* Write all eraseblocks */ |
| simple_srand(11); |
| printk(PRINT_PREF "writing OOBs of whole device\n"); |
| for (i = 0; i < ebcnt - 1; ++i) { |
| int cnt = 2; |
| int pg; |
| size_t sz = mtd->ecclayout->oobavail; |
| if (bbt[i] || bbt[i + 1]) |
| continue; |
| addr = (i + 1) * mtd->erasesize - mtd->writesize; |
| for (pg = 0; pg < cnt; ++pg) { |
| set_random_data(writebuf, sz); |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = sz; |
| ops.oobretlen = 0; |
| ops.ooboffs = 0; |
| ops.datbuf = NULL; |
| ops.oobbuf = writebuf; |
| err = mtd->write_oob(mtd, addr, &ops); |
| if (err) |
| goto out; |
| if (i % 256 == 0) |
| printk(PRINT_PREF "written up to eraseblock " |
| "%u\n", i); |
| cond_resched(); |
| addr += mtd->writesize; |
| } |
| } |
| printk(PRINT_PREF "written %u eraseblocks\n", i); |
| |
| /* Check all eraseblocks */ |
| simple_srand(11); |
| printk(PRINT_PREF "verifying all eraseblocks\n"); |
| for (i = 0; i < ebcnt - 1; ++i) { |
| if (bbt[i] || bbt[i + 1]) |
| continue; |
| set_random_data(writebuf, mtd->ecclayout->oobavail * 2); |
| addr = (i + 1) * mtd->erasesize - mtd->writesize; |
| ops.mode = MTD_OPS_AUTO_OOB; |
| ops.len = 0; |
| ops.retlen = 0; |
| ops.ooblen = mtd->ecclayout->oobavail * 2; |
| ops.oobretlen = 0; |
| ops.ooboffs = 0; |
| ops.datbuf = NULL; |
| ops.oobbuf = readbuf; |
| err = mtd->read_oob(mtd, addr, &ops); |
| if (err) |
| goto out; |
| if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) { |
| printk(PRINT_PREF "error: verify failed at %#llx\n", |
| (long long)addr); |
| errcnt += 1; |
| if (errcnt > 1000) { |
| printk(PRINT_PREF "error: too many errors\n"); |
| goto out; |
| } |
| } |
| if (i % 256 == 0) |
| printk(PRINT_PREF "verified up to eraseblock %u\n", i); |
| cond_resched(); |
| } |
| printk(PRINT_PREF "verified %u eraseblocks\n", i); |
| |
| printk(PRINT_PREF "finished with %d errors\n", errcnt); |
| out: |
| kfree(bbt); |
| kfree(writebuf); |
| kfree(readbuf); |
| put_mtd_device(mtd); |
| if (err) |
| printk(PRINT_PREF "error %d occurred\n", err); |
| printk(KERN_INFO "=================================================\n"); |
| return err; |
| } |
| module_init(mtd_oobtest_init); |
| |
| static void __exit mtd_oobtest_exit(void) |
| { |
| return; |
| } |
| module_exit(mtd_oobtest_exit); |
| |
| MODULE_DESCRIPTION("Out-of-band test module"); |
| MODULE_AUTHOR("Adrian Hunter"); |
| MODULE_LICENSE("GPL"); |
