Because of the possible failure of the dma_supported(), the dma_set_mask_and_coherent() may return error num. Therefore, it should be better to check it and return the error if fails.
Fixes: f6f9279f2bf0 ("misc: fastrpc: Add Qualcomm fastrpc basic driver model") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn --- drivers/misc/fastrpc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index beda610e6b30..dd1c4a75bb1d 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1644,7 +1644,12 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) kref_init(&data->refcount);
dev_set_drvdata(&rpdev->dev, data); - dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); + err = dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32)); + if (err) { + kfree(data); + return err; + } + INIT_LIST_HEAD(&data->users); spin_lock_init(&data->lock); idr_init(&data->ctx_idr);