From 69b9fe22b19b31d9de96d4a181f7206fd29ab743 Mon Sep 17 00:00:00 2001 From: Maurizio Lombardi Date: Fri, 27 Jun 2014 06:28:31 -0300 Subject: [PATCH] [media] s5p: fix error code path when failing to allocate DMA memory In the s5p_mfc_alloc_firmware() function there are some mistakes where the code checks whether the DMA memory is properly allocated or not. First of all dma_alloc_coherent() returns NULL in case of error. The code also checked two times fw_virt_addr, ignoring the bank2_virt pointer. Signed-off-by: Maurizio Lombardi Signed-off-by: Kamil Debski Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c b/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c index 6c3f8f743900..390ca20be6ef 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c @@ -38,8 +38,7 @@ int s5p_mfc_alloc_firmware(struct s5p_mfc_dev *dev) dev->fw_virt_addr = dma_alloc_coherent(dev->mem_dev_l, dev->fw_size, &dev->bank1, GFP_KERNEL); - if (IS_ERR_OR_NULL(dev->fw_virt_addr)) { - dev->fw_virt_addr = NULL; + if (!dev->fw_virt_addr) { mfc_err("Allocating bitprocessor buffer failed\n"); return -ENOMEM; } @@ -48,7 +47,7 @@ int s5p_mfc_alloc_firmware(struct s5p_mfc_dev *dev) bank2_virt = dma_alloc_coherent(dev->mem_dev_r, 1 << MFC_BASE_ALIGN_ORDER, &bank2_dma_addr, GFP_KERNEL); - if (IS_ERR(dev->fw_virt_addr)) { + if (!bank2_virt) { mfc_err("Allocating bank2 base failed\n"); dma_free_coherent(dev->mem_dev_l, dev->fw_size, dev->fw_virt_addr, dev->bank1);