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>

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 8b90516..cc0f329 100644 (file)
--- 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);
                }