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PCI: hv: Allocate a named fwnode instead of an address-based one 

To allocate its fwnode that is then used to allocate an irqdomain,
the driver uses irq_domain_alloc_fwnode(), passing it a VA as an
identifier. This is a rather bad idea, as this address ends up
published in debugfs (and we want to move away from VAs there
anyway).

Instead, let's allocate a named fwnode by using the device GUID as
an identifier. It is allegedly unique, and can be traced back to
the original device.

Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2019-08-06 15:23:33 +01:00
parent daa19fe5b0
commit 467a3bb974
1 changed files with 9 additions and 1 deletions
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10
drivers/pci/controller/pci-hyperv.c
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@ -2521,6 +2521,7 @@ static int hv_pci_probe(struct hv_device *hdev,
const struct hv_vmbus_device_id *dev_id)
{
struct hv_pcibus_device *hbus;
char *name;
int ret;
/*
@ -2589,7 +2590,14 @@ static int hv_pci_probe(struct hv_device *hdev,
goto free_config;
}
hbus->sysdata.fwnode = irq_domain_alloc_fwnode(hbus);
name = kasprintf(GFP_KERNEL, "%pUL", &hdev->dev_instance);
if (!name) {
ret = -ENOMEM;
goto unmap;
}
hbus->sysdata.fwnode = irq_domain_alloc_named_fwnode(name);
kfree(name);
if (!hbus->sysdata.fwnode) {
ret = -ENOMEM;
goto unmap;