From: Tero Kristo t-kristo@ti.com
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 mathieu.poirier@linaro.org Acked-by: Arnaud Pouliquen arnaud.pouliquen@st.com Fixes: 086d08725d34 ("remoteproc: create vdev subdevice with specific dma memory pool") Signed-off-by: Tero Kristo t-kristo@ti.com Signed-off-by: Suman Anna s-anna@ti.com Link: https://lore.kernel.org/r/20200420160600.10467-2-s-anna@ti.com Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/remoteproc/remoteproc_virtio.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
--- a/drivers/remoteproc/remoteproc_virtio.c +++ b/drivers/remoteproc/remoteproc_virtio.c @@ -375,6 +375,18 @@ int rproc_add_virtio_dev(struct rproc_vd 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 */