misc: fastrpc: Add dma_mask to fastrpc_channel_ctx

dma_set_mask_and_coherent only updates the mask to which the device
dma_mask pointer points to. Add a dma_mask to the channel ctx and set
the device dma_mask to point to that, otherwise the dma_set_mask will
return an error and the dma_set_coherent_mask will be skipped too.

Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221125071405.148786-11-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 2e49bf1..278ab6c 100644 (file)
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -278,6 +278,7 @@ struct fastrpc_channel_ctx {
        struct list_head invoke_interrupted_mmaps;
        bool secure;
        bool unsigned_support;
+       u64 dma_mask;
 };
 
 struct fastrpc_device {
@@ -2303,6 +2304,7 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
        kref_init(&data->refcount);
 
        dev_set_drvdata(&rpdev->dev, data);
+       rdev->dma_mask = &data->dma_mask;
        dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32));
        INIT_LIST_HEAD(&data->users);
        INIT_LIST_HEAD(&data->invoke_interrupted_mmaps);