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46 lines
1.6 KiB
Diff
46 lines
1.6 KiB
Diff
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From 703972946a42cf1f83bf50cf389d618d61b69500 Mon Sep 17 00:00:00 2001
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From: Bharat Bhushan <Bharat.Bhushan@nxp.com>
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Date: Mon, 10 Dec 2018 14:42:51 +0530
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Subject: [PATCH] bus: fsl-mc: Allocate mc-portal from root dprc container
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Root dprc container have allocate-able mc-portals which
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can be allocated by kernel drivers.
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As per current design mc-portal is allocated from parent
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dprc container if requesting device is not root-dprc.
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This works fine if the requesting device is child of
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root dprc container, because their parent is root-dprc
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container. But if request device is grandchild of root
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dprc container then it tries to allocate from it's parent
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root dprc-container and it fails.
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Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
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Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
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---
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drivers/bus/fsl-mc/mc-io.c | 10 ++++++----
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1 file changed, 6 insertions(+), 4 deletions(-)
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--- a/drivers/bus/fsl-mc/mc-io.c
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+++ b/drivers/bus/fsl-mc/mc-io.c
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@@ -169,14 +169,16 @@ int __must_check fsl_mc_portal_allocate(
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int error = -EINVAL;
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struct fsl_mc_resource *resource = NULL;
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struct fsl_mc_io *mc_io = NULL;
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+ struct device *root_dprc_dev;
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- if (mc_dev->flags & FSL_MC_IS_DPRC) {
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+ if (fsl_mc_is_root_dprc(&mc_dev->dev)) {
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mc_bus_dev = mc_dev;
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} else {
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- if (!dev_is_fsl_mc(mc_dev->dev.parent))
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- return error;
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+ fsl_mc_get_root_dprc(&mc_dev->dev, &root_dprc_dev);
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+ if (WARN_ON(!root_dprc_dev))
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+ return -EINVAL;
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- mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
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+ mc_bus_dev = to_fsl_mc_device(root_dprc_dev);
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}
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mc_bus = to_fsl_mc_bus(mc_bus_dev);
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