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bus: fsl-mc: Allocate mc-portal from root dprc container 

Root dprc container have allocate-able mc-portals which
can be allocated by kernel drivers.

As per current design mc-portal is allocated from parent
dprc container if requesting device is not root-dprc.
This works fine if the requesting device is child of
root dprc container, because their parent is root-dprc
container. But if request device is grandchild of root
dprc container then it tries to allocate from it's parent
root dprc-container and it fails.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
5.4-rM2-2.2.x-imx-squashed
Bharat Bhushan 2018-12-10 14:42:51 +05:30 committed by Dong Aisheng
parent f5802e6188
commit 9d92fe98c8
1 changed files with 6 additions and 4 deletions
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10
drivers/bus/fsl-mc/mc-io.c
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@ -169,14 +169,16 @@ int __must_check fsl_mc_portal_allocate(struct fsl_mc_device *mc_dev,
int error = -EINVAL;
struct fsl_mc_resource *resource = NULL;
struct fsl_mc_io *mc_io = NULL;
struct device *root_dprc_dev;
if (mc_dev->flags & FSL_MC_IS_DPRC) {
if (fsl_mc_is_root_dprc(&mc_dev->dev)) {
mc_bus_dev = mc_dev;
} else {
if (!dev_is_fsl_mc(mc_dev->dev.parent))
return error;
fsl_mc_get_root_dprc(&mc_dev->dev, &root_dprc_dev);
if (WARN_ON(!root_dprc_dev))
return -EINVAL;
mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
mc_bus_dev = to_fsl_mc_device(root_dprc_dev);
}
mc_bus = to_fsl_mc_bus(mc_bus_dev);