diff options
| author | Mark Rutland <mark.rutland@arm.com> | 2016-04-25 12:25:11 +0200 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-04-25 14:54:15 +0200 |
| commit | 9981293fb0f02e6127d6ab00218bf091f9f6c89b (patch) | |
| tree | 989fb4cccf131cf22c84ff34c0dd2b386e923f41 /arch/arm64/kernel/acpi.c | |
| parent | ARM64: ACPI: Check if it runs on Xen to enable or disable ACPI (diff) | |
| download | linux-9981293fb0f02e6127d6ab00218bf091f9f6c89b.tar.xz linux-9981293fb0f02e6127d6ab00218bf091f9f6c89b.zip | |
arm64: make dt_scan_depth1_nodes more readable
Improve the readability of dt_scan_depth1_nodes by removing the nested
conditionals.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/acpi.c')
| -rw-r--r-- | arch/arm64/kernel/acpi.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index 57ee31745af5..6884c7678453 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -66,17 +66,24 @@ static int __init dt_scan_depth1_nodes(unsigned long node, void *data) { /* - * Return 1 as soon as we encounter a node at depth 1 that is - * not the /chosen node, or /hypervisor node with compatible - * string "xen,xen". + * Ignore anything not directly under the root node; we'll + * catch its parent instead. */ - if (depth == 1 && (strcmp(uname, "chosen") != 0)) { - if (strcmp(uname, "hypervisor") != 0 || - !of_flat_dt_is_compatible(node, "xen,xen")) - return 1; - } + if (depth != 1) + return 0; - return 0; + if (strcmp(uname, "chosen") == 0) + return 0; + + if (strcmp(uname, "hypervisor") == 0 && + of_flat_dt_is_compatible(node, "xen,xen")) + return 0; + + /* + * This node at depth 1 is neither a chosen node nor a xen node, + * which we do not expect. + */ + return 1; } /* |