In function ioat_xor_val_self_test(), when the calls to dma_mapping_error() fail, the value of return variable err is 0 (indicates no error). As a result, the return value may be inconsistent with the execution status. This patch fixes the bug by assigning "-ENOMEM" to err on the error path. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188601 Signed-off-by: Pan Bian <bianpan2016@xxxxxxx> --- drivers/dma/ioat/init.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 32383ef..3d589f4 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -829,16 +829,20 @@ static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma) op = IOAT_OP_XOR; dest_dma = dma_map_page(dev, dest, 0, PAGE_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(dev, dest_dma)) + if (dma_mapping_error(dev, dest_dma)) { + err = -ENOMEM; goto free_resources; + } for (i = 0; i < IOAT_NUM_SRC_TEST; i++) dma_srcs[i] = DMA_ERROR_CODE; for (i = 0; i < IOAT_NUM_SRC_TEST; i++) { dma_srcs[i] = dma_map_page(dev, xor_srcs[i], 0, PAGE_SIZE, DMA_TO_DEVICE); - if (dma_mapping_error(dev, dma_srcs[i])) + if (dma_mapping_error(dev, dma_srcs[i])) { + err = -ENOMEM; goto dma_unmap; + } } tx = dma->device_prep_dma_xor(dma_chan, dest_dma, dma_srcs, IOAT_NUM_SRC_TEST, PAGE_SIZE, @@ -906,8 +910,10 @@ static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma) for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) { dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE, DMA_TO_DEVICE); - if (dma_mapping_error(dev, dma_srcs[i])) + if (dma_mapping_error(dev, dma_srcs[i])) { + err = -ENOMEM; goto dma_unmap; + } } tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs, IOAT_NUM_SRC_TEST + 1, PAGE_SIZE, @@ -959,8 +965,10 @@ static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma) for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) { dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE, DMA_TO_DEVICE); - if (dma_mapping_error(dev, dma_srcs[i])) + if (dma_mapping_error(dev, dma_srcs[i])) { + err = -ENOMEM; goto dma_unmap; + } } tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs, IOAT_NUM_SRC_TEST + 1, PAGE_SIZE, -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
