ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC
authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Fri, 19 Jun 2020 08:20:02 +0000 (09:20 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Tue, 28 Jul 2020 14:51:30 +0000 (15:51 +0100)
commit07d2e59f27cd728e6982b52441673886a6d04267
tree32ba985b0ccc8a31c5742d9eb0a613f3a596193e
parent9ebcfadb0610322ac537dd7aa5d9cbc2b2894c68
ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC

When the iort_match_node_callback is invoked for a named component
the match should be executed upon a device with an ACPI companion.

For devices with no ACPI companion set-up the ACPI device tree must be
walked in order to find the first parent node with a companion set and
check the parent node against the named component entry to check whether
there is a match and therefore an IORT node describing the in/out ID
translation for the device has been found.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Link: https://lore.kernel.org/r/20200619082013.13661-2-lorenzo.pieralisi@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
drivers/acpi/arm64/iort.c