[PATCH AUTOSEL 5.2 29/85] remoteproc: copy parent dma_pfn_offset for vdev

[Sasha Levin]

From: Clement Leger <cle...@kalray.eu>

[ Upstream commit 72f64cabc4bd6985c7355f5547bd3637c82762ac ]

When preparing the subdevice for the vdev, also copy dma_pfn_offset
since this is used for sub device dma allocations. Without that, there
is incoherency between the parent dma settings and the childs one,
potentially leading to dma_alloc_coherent failure (due to phys_to_dma
using dma_pfn_offset for translation).

Fixes: 086d08725d34 ("remoteproc: create vdev subdevice with specific dma 
memory pool")
Signed-off-by: Clement Leger <cle...@kalray.eu>
Acked-by: Loic Pallardy <loic.palla...@st.com>
Signed-off-by: Bjorn Andersson <bjorn.anders...@linaro.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/remoteproc/remoteproc_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/remoteproc/remoteproc_core.c 
b/drivers/remoteproc/remoteproc_core.c
index 8b5363223eaa..5031c6806908 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -512,6 +512,7 @@ static int rproc_handle_vdev(struct rproc *rproc, struct 
fw_rsc_vdev *rsc,
        /* Initialise vdev subdevice */
        snprintf(name, sizeof(name), "vdev%dbuffer", rvdev->index);
        rvdev->dev.parent = rproc->dev.parent;
+       rvdev->dev.dma_pfn_offset = rproc->dev.parent->dma_pfn_offset;
        rvdev->dev.release = rproc_rvdev_release;
        dev_set_name(&rvdev->dev, "%s#%s", dev_name(rvdev->dev.parent), name);
        dev_set_drvdata(&rvdev->dev, rvdev);
-- 
2.20.1