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yaml
---
r: 332741
b: refs/heads/master
c: c5b8384
h: refs/heads/master
i:
  332739: 512047f
v: v3
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Akinobu Mita authored and David Woodhouse committed Sep 29, 2012
1 parent 79994a4 commit 7162017
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Showing 2 changed files with 30 additions and 20 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: bb82477ebede3d0c37a502a899b68eb45fefca4f
refs/heads/master: c5b8384abc11fd566a3633b7bd7d476ff04c31af
48 changes: 29 additions & 19 deletions trunk/drivers/mtd/tests/mtd_nandecctest.c
Original file line number Diff line number Diff line change
Expand Up @@ -15,41 +15,51 @@ static void inject_single_bit_error(void *data, size_t size)
__change_bit(offset, data);
}

static unsigned char data[512];
static void dump_data_ecc(void *error_data, void *error_ecc, void *correct_data,
void *correct_ecc, const size_t size)
{
pr_info("hexdump of error data:\n");
print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 4,
error_data, size, false);
print_hex_dump(KERN_INFO, "hexdump of error ecc: ",
DUMP_PREFIX_NONE, 16, 1, error_ecc, 3, false);

pr_info("hexdump of correct data:\n");
print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 4,
correct_data, size, false);
print_hex_dump(KERN_INFO, "hexdump of correct ecc: ",
DUMP_PREFIX_NONE, 16, 1, correct_ecc, 3, false);
}

static unsigned char correct_data[512];
static unsigned char error_data[512];

static int nand_ecc_test(const size_t size)
{
unsigned char code[3];
unsigned char error_code[3];
unsigned char correct_ecc[3];
unsigned char error_ecc[3];
char testname[30];

BUG_ON(sizeof(data) < size);
BUG_ON(sizeof(correct_data) < size);

sprintf(testname, "nand-ecc-%zu", size);

get_random_bytes(data, size);
get_random_bytes(correct_data, size);

memcpy(error_data, data, size);
memcpy(error_data, correct_data, size);
inject_single_bit_error(error_data, size);

__nand_calculate_ecc(data, size, code);
__nand_calculate_ecc(error_data, size, error_code);
__nand_correct_data(error_data, code, error_code, size);
__nand_calculate_ecc(correct_data, size, correct_ecc);
__nand_calculate_ecc(error_data, size, error_ecc);
__nand_correct_data(error_data, correct_ecc, error_ecc, size);

if (!memcmp(data, error_data, size)) {
printk(KERN_INFO "mtd_nandecctest: ok - %s\n", testname);
if (!memcmp(correct_data, error_data, size)) {
pr_info("mtd_nandecctest: ok - %s\n", testname);
return 0;
}

printk(KERN_ERR "mtd_nandecctest: not ok - %s\n", testname);

printk(KERN_DEBUG "hexdump of data:\n");
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
data, size, false);
printk(KERN_DEBUG "hexdump of error data:\n");
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
error_data, size, false);
pr_err("mtd_nandecctest: not ok - %s\n", testname);
dump_data_ecc(error_data, error_ecc, correct_data, correct_ecc, size);

return -EINVAL;
}
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