From: Suman Anna Date: Mon, 20 Apr 2020 16:06:00 +0000 (-0500) Subject: remoteproc: Fix and restore the parenting hierarchy for vdev X-Git-Tag: v5.4.47~38 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=943f3ae9b149a11900565aeb56fc9a2f453fcc4e;p=platform%2Fkernel%2Flinux-rpi.git remoteproc: Fix and restore the parenting hierarchy for vdev commit c774ad010873bb89dcc0cdcb1e96aef6664d8caf upstream. The commit 086d08725d34 ("remoteproc: create vdev subdevice with specific dma memory pool") has introduced a new vdev subdevice for each vdev declared in the firmware resource table and made it as the parent for the created virtio rpmsg devices instead of the previous remoteproc device. This changed the overall parenting hierarchy for the rpmsg devices, which were children of virtio devices, and does not allow the corresponding rpmsg drivers to retrieve the parent rproc device through the rproc_get_by_child() API. Fix this by restoring the remoteproc device as the parent. The new vdev subdevice can continue to inherit the DMA attributes from the remoteproc's parent device (actual platform device). Cc: stable@vger.kernel.org Fixes: 086d08725d34 ("remoteproc: create vdev subdevice with specific dma memory pool") Signed-off-by: Suman Anna Reviewed-by: Mathieu Poirier Acked-by: Arnaud Pouliquen Link: https://lore.kernel.org/r/20200420160600.10467-3-s-anna@ti.com Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 010f541..0896b36 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -511,7 +511,7 @@ 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.parent = &rproc->dev; 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);