mmc_test: fix memory allocation segment limits

Correctly allocate memory to meet the host controller
driver's maximum segment size and count limits.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index 6580af7..5874040 100644 (file)
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -318,8 +318,8 @@ static struct mmc_test_mem *mmc_test_alloc_mem(unsigned long min_sz,
 
        if (max_page_cnt > limit)
                max_page_cnt = limit;
-       if (max_page_cnt < min_page_cnt)
-               max_page_cnt = min_page_cnt;
+       if (min_page_cnt > max_page_cnt)
+               min_page_cnt = max_page_cnt;
 
        if (max_seg_page_cnt > max_page_cnt)
                max_seg_page_cnt = max_page_cnt;
@@ -359,13 +359,13 @@ static struct mmc_test_mem *mmc_test_alloc_mem(unsigned long min_sz,
                mem->cnt += 1;
                if (max_page_cnt <= (1UL << order))
                        break;
+               max_page_cnt -= 1UL << order;
+               page_cnt += 1UL << order;
                if (mem->cnt >= max_segs) {
                        if (page_cnt < min_page_cnt)
                                goto out_free;
                        break;
                }
-               max_page_cnt -= 1UL << order;
-               page_cnt += 1UL << order;
        }
 
        return mem;
@@ -1470,12 +1470,12 @@ static int mmc_test_area_init(struct mmc_test_card *test, int erase, int fill)
                t->max_tfr = t->max_segs * t->max_seg_sz;
 
        /*
-        * Try to allocate enough memory for the whole area.  Less is OK
+        * Try to allocate enough memory for a max. sized transfer.  Less is OK
         * because the same memory can be mapped into the scatterlist more than
         * once.  Also, take into account the limits imposed on scatterlist
         * segments by the host driver.
         */
-       t->mem = mmc_test_alloc_mem(min_sz, t->max_sz, t->max_segs,
+       t->mem = mmc_test_alloc_mem(min_sz, t->max_tfr, t->max_segs,
                                    t->max_seg_sz);
        if (!t->mem)
                return -ENOMEM;