summaryrefslogtreecommitdiffstats
path: root/drivers/firmware
diff options
context:
space:
mode:
authorJulien Thierry <julien.thierry@arm.com>2018-11-29 18:12:22 +0100
committerIngo Molnar <mingo@kernel.org>2018-11-30 09:10:30 +0100
commit8c25db0a5a67986106aa3da7ce165ff961aa7847 (patch)
tree7a7d3a7637882ebf59a5e2cc3701bda0283be3cf /drivers/firmware
parent6935b3c43da96bb48017b2a3bc1d4f93899f9b28 (diff)
downloadlinux-8c25db0a5a67986106aa3da7ce165ff961aa7847.tar.bz2
efi/fdt: Simplify the get_fdt() flow
Reorganize the get_fdt() lookup loop, clearly showing that: - Nothing is done for table entries that do not have fdt_guid - Once an entry with fdt_guid is found, break out of the loop No functional changes. Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Julien Thierry <julien.thierry@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arend van Spriel <arend.vanspriel@broadcom.com> Cc: Bhupesh Sharma <bhsharma@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Eric Snowberg <eric.snowberg@oracle.com> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Jon Hunter <jonathanh@nvidia.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com> Cc: Sedat Dilek <sedat.dilek@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: YiFei Zhu <zhuyifei1999@gmail.com> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20181129171230.18699-4-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/efi/libstub/fdt.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c
index a3614f9b5f75..0dc7b4987cc2 100644
--- a/drivers/firmware/efi/libstub/fdt.c
+++ b/drivers/firmware/efi/libstub/fdt.c
@@ -370,23 +370,24 @@ void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size)
{
efi_guid_t fdt_guid = DEVICE_TREE_GUID;
efi_config_table_t *tables;
- void *fdt;
int i;
- tables = (efi_config_table_t *) sys_table->tables;
- fdt = NULL;
+ tables = (efi_config_table_t *)sys_table->tables;
for (i = 0; i < sys_table->nr_tables; i++) {
- if (efi_guidcmp(tables[i].guid, fdt_guid) == 0) {
- fdt = (void *) tables[i].table;
- if (fdt_check_header(fdt) != 0) {
- pr_efi_err(sys_table, "Invalid header detected on UEFI supplied FDT, ignoring ...\n");
- return NULL;
- }
- *fdt_size = fdt_totalsize(fdt);
- break;
+ void *fdt;
+
+ if (efi_guidcmp(tables[i].guid, fdt_guid) != 0)
+ continue;
+
+ fdt = (void *)tables[i].table;
+ if (fdt_check_header(fdt) != 0) {
+ pr_efi_err(sys_table, "Invalid header detected on UEFI supplied FDT, ignoring ...\n");
+ return NULL;
}
+ *fdt_size = fdt_totalsize(fdt);
+ return fdt;
}
- return fdt;
+ return NULL;
}