From 81fb06cb6bd4ea34ec4357d0914e4057791e7aaa Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Mon, 20 Apr 2020 11:05:59 -0500 Subject: [PATCH] remoteproc: Fall back to using parent memory pool if no dedicated available commit db9178a4f8c4e523f824892cb8bab00961b07385 upstream. In some cases, like with OMAP remoteproc, we are not creating dedicated memory pool for the virtio device. Instead, we use the same memory pool for all shared memories. The current virtio memory pool handling forces a split between these two, as a separate device is created for it, causing memory to be allocated from bad location if the dedicated pool is not available. Fix this by falling back to using the parent device memory pool if dedicated is not available. Cc: stable@vger.kernel.org Reviewed-by: Mathieu Poirier Acked-by: Arnaud Pouliquen Fixes: 086d08725d34 ("remoteproc: create vdev subdevice with specific dma memory pool") Signed-off-by: Tero Kristo Signed-off-by: Suman Anna Link: https://lore.kernel.org/r/20200420160600.10467-2-s-anna@ti.com Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- drivers/remoteproc/remoteproc_virtio.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c index 31a62a0b470e..380d52672035 100644 --- a/drivers/remoteproc/remoteproc_virtio.c +++ b/drivers/remoteproc/remoteproc_virtio.c @@ -375,6 +375,18 @@ int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id) goto out; } } + } else { + struct device_node *np = rproc->dev.parent->of_node; + + /* + * If we don't have dedicated buffer, just attempt to re-assign + * the reserved memory from our parent. A default memory-region + * at index 0 from the parent's memory-regions is assigned for + * the rvdev dev to allocate from. Failure is non-critical and + * the allocations will fall back to global pools, so don't + * check return value either. + */ + of_reserved_mem_device_init_by_idx(dev, np, 0); } /* Allocate virtio device */