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mmc_test: test oversized sg lists 

Add tests that make sure the driver properly checks the blocks and
blksz fields and doesn't assume the sg list has a size that perfectly
matches the current request.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman 2008-07-21 00:14:52 +02:00
parent 2661081f5a
commit 48b5352ea1
1 changed files with 82 additions and 3 deletions
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85
drivers/mmc/card/mmc_test.c
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@ -388,14 +388,16 @@ static int mmc_test_transfer(struct mmc_test_card *test,
int ret, i;
unsigned long flags;
BUG_ON(blocks * blksz > BUFFER_SIZE);
if (write) {
for (i = 0;i < blocks * blksz;i++)
test->scratch[i] = i;
} else {
memset(test->scratch, 0, BUFFER_SIZE);
memset(test->scratch, 0, blocks * blksz);
}
local_irq_save(flags);
sg_copy_from_buffer(sg, sg_len, test->scratch, BUFFER_SIZE);
sg_copy_from_buffer(sg, sg_len, test->scratch, blocks * blksz);
local_irq_restore(flags);
ret = mmc_test_set_blksize(test, blksz);
@ -442,7 +444,7 @@ static int mmc_test_transfer(struct mmc_test_card *test,
}
} else {
local_irq_save(flags);
sg_copy_to_buffer(sg, sg_len, test->scratch, BUFFER_SIZE);
sg_copy_to_buffer(sg, sg_len, test->scratch, blocks * blksz);
local_irq_restore(flags);
for (i = 0;i < blocks * blksz;i++) {
if (test->scratch[i] != (u8)i)
@ -803,6 +805,69 @@ static int mmc_test_multi_xfersize_read(struct mmc_test_card *test)
return 0;
}
static int mmc_test_bigsg_write(struct mmc_test_card *test)
{
int ret;
unsigned int size;
struct scatterlist sg;
if (test->card->host->max_blk_count == 1)
return RESULT_UNSUP_HOST;
size = PAGE_SIZE * 2;
size = min(size, test->card->host->max_req_size);
size = min(size, test->card->host->max_seg_size);
size = min(size, test->card->host->max_blk_count * 512);
memset(test->buffer, 0, BUFFER_SIZE);
if (size < 1024)
return RESULT_UNSUP_HOST;
sg_init_table(&sg, 1);
sg_init_one(&sg, test->buffer, BUFFER_SIZE);
ret = mmc_test_transfer(test, &sg, 1, 0, size/512, 512, 1);
if (ret)
return ret;
return 0;
}
static int mmc_test_bigsg_read(struct mmc_test_card *test)
{
int ret, i;
unsigned int size;
struct scatterlist sg;
if (test->card->host->max_blk_count == 1)
return RESULT_UNSUP_HOST;
size = PAGE_SIZE * 2;
size = min(size, test->card->host->max_req_size);
size = min(size, test->card->host->max_seg_size);
size = min(size, test->card->host->max_blk_count * 512);
if (size < 1024)
return RESULT_UNSUP_HOST;
memset(test->buffer, 0xCD, BUFFER_SIZE);
sg_init_table(&sg, 1);
sg_init_one(&sg, test->buffer, BUFFER_SIZE);
ret = mmc_test_transfer(test, &sg, 1, 0, size/512, 512, 0);
if (ret)
return ret;
/* mmc_test_transfer() doesn't check for read overflows */
for (i = size;i < BUFFER_SIZE;i++) {
if (test->buffer[i] != 0xCD)
return RESULT_FAIL;
}
return 0;
}
#ifdef CONFIG_HIGHMEM
static int mmc_test_write_high(struct mmc_test_card *test)
@ -1006,6 +1071,20 @@ static const struct mmc_test_case mmc_test_cases[] = {
.run = mmc_test_multi_xfersize_read,
},
{
.name = "Over-sized SG list write",
.prepare = mmc_test_prepare_write,
.run = mmc_test_bigsg_write,
.cleanup = mmc_test_cleanup,
},
{
.name = "Over-sized SG list read",
.prepare = mmc_test_prepare_read,
.run = mmc_test_bigsg_read,
.cleanup = mmc_test_cleanup,
},
#ifdef CONFIG_HIGHMEM
{