On 2/28/2015 8:00 AM, yanjiang.jin@xxxxxxxxxxxxx wrote:
> From: Yanjiang Jin <yanjiang.jin@xxxxxxxxxxxxx>
>
> Add two missed dma_mapping_error() after dma_map_single().
>
> Signed-off-by: Yanjiang Jin <yanjiang.jin@xxxxxxxxxxxxx>
> ---
> drivers/crypto/caam/caamhash.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
> index f347ab7..f6ad322 100644
> --- a/drivers/crypto/caam/caamhash.c
> +++ b/drivers/crypto/caam/caamhash.c
> @@ -160,6 +160,10 @@ static inline dma_addr_t map_seq_out_ptr_result(u32 *desc, struct device *jrdev,
> dma_addr_t dst_dma;
>
> dst_dma = dma_map_single(jrdev, result, digestsize, DMA_FROM_DEVICE);
> + if (dma_mapping_error(jrdev, dst_dma)) {
> + dev_err(jrdev, "unable to map dst dma\n");
> + return -ENOMEM;
> + }
> append_seq_out_ptr(desc, dst_dma, digestsize, 0);
>
> return dst_dma;
Value returned by map_seq_out_ptr_result() - dst_dma - is always fed to
dma_mapping_error().
Note that using an invalid dst_dma in append_seq_out_ptr() doesn't break
anything, so it's ok to check dst_dma later.
> @@ -173,6 +177,10 @@ static inline dma_addr_t buf_map_to_sec4_sg(struct device *jrdev,
> dma_addr_t buf_dma;
>
> buf_dma = dma_map_single(jrdev, buf, buflen, DMA_TO_DEVICE);
> + if (dma_mapping_error(jrdev, buf_dma)) {
> + dev_err(jrdev, "unable to map buf dma\n");
> + return 0;
> + }
> dma_to_sec4_sg_one(sec4_sg, buf_dma, buflen, 0);
>
> return buf_dma;
>
These functions are expected to return dma_addr_t, not an error code.
If dma_mapping_error() is needed within their scope, the return type
will have to change. And return value will need to be checked by their
callers.
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