dmatest: correct raid6 PQ test

The number of PQ sources specified by module parameter "pq_sources"
is always forced odd to fit into dmatest's destination verificaton
scheme. But number of PQ sources and coefficients as passed to the
driver's prep_dma_pq() is not adjusted accordingly.

Fix it now to get correct PQ testing results in the case passed
"pq_sources" parameter is even.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 8b905161fbf4..cc0f3294a766 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -237,7 +237,7 @@ static int dmatest_func(void *data)
         dma_cookie_t            cookie;
         enum dma_status         status;
         enum dma_ctrl_flags     flags;
-        u8                      pq_coefs[pq_sources];
+        u8                      pq_coefs[pq_sources + 1];
         int                     ret;
         int                     src_cnt;
         int                     dst_cnt;
@@ -257,7 +257,7 @@ static int dmatest_func(void *data)
         } else if (thread->type == DMA_PQ) {
                 src_cnt = pq_sources | 1; /* force odd to ensure dst = src */
                 dst_cnt = 2;
-                for (i = 0; i < pq_sources; i++)
+                for (i = 0; i < src_cnt; i++)
                         pq_coefs[i] = 1;
         } else
                 goto err_srcs;
@@ -355,7 +355,7 @@ static int dmatest_func(void *data)
                         for (i = 0; i < dst_cnt; i++)
                                 dma_pq[i] = dma_dsts[i] + dst_off;
                         tx = dev->device_prep_dma_pq(chan, dma_pq, dma_srcs,
-                                                     pq_sources, pq_coefs,
+                                                     src_cnt, pq_coefs,
                                                      len, flags);
                 }