mmc_test: Revert "mmc_test: test oversized sg lists"

This reverts commit 48b5352ea1891455eb8e824cf7d92f66931a090f. Oversized
sg lists are not allowed anymore, and the core even checks for them in
debug mode, so this test is entirely incorrect.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

drivers/mmc/card/mmc_test.c

@@ -388,16 +388,14 @@ 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, blocks * blksz);
+		memset(test->scratch, 0, BUFFER_SIZE);
 	}
 	local_irq_save(flags);
-	sg_copy_from_buffer(sg, sg_len, test->scratch, blocks * blksz);
+	sg_copy_from_buffer(sg, sg_len, test->scratch, BUFFER_SIZE);
 	local_irq_restore(flags);
 
 	ret = mmc_test_set_blksize(test, blksz);
@@ -444,7 +442,7 @@ static int mmc_test_transfer(struct mmc_test_card *test,
 		}
 	} else {
 		local_irq_save(flags);
-		sg_copy_to_buffer(sg, sg_len, test->scratch, blocks * blksz);
+		sg_copy_to_buffer(sg, sg_len, test->scratch, BUFFER_SIZE);
 		local_irq_restore(flags);
 		for (i = 0;i < blocks * blksz;i++) {
 			if (test->scratch[i] != (u8)i)
@@ -805,69 +803,6 @@ 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)
@@ -1071,20 +1006,6 @@ 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
 
 	{