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efi: fdt: Do not report an error during boot if UEFI is not available 

Currently, fdt_find_uefi_params() reports an error if no EFI parameters
are found in the DT. This is however a valid case for non-UEFI kernel
booting. This patch checks changes the error reporting to a
pr_info("UEFI not found") when no EFI parameters are found in the DT.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Leif Lindholm <leif.lindholm@linaro.org>
Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Catalin Marinas 2014-07-08 16:54:18 +01:00 committed by Matt Fleming
parent a55c072dfe
commit 29e2435fd6
1 changed files with 15 additions and 7 deletions
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22
drivers/firmware/efi/efi.c
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@ -346,6 +346,7 @@ static __initdata struct {
struct param_info {
int verbose;
int found;
void *params;
};
@ -362,16 +363,12 @@ static int __init fdt_find_uefi_params(unsigned long node, const char *uname,
(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
return 0;
pr_info("Getting parameters from FDT:\n");
for (i = 0; i < ARRAY_SIZE(dt_params); i++) {
prop = of_get_flat_dt_prop(node, dt_params[i].propname, &len);
if (!prop) {
pr_err("Can't find %s in device tree!\n",
dt_params[i].name);
if (!prop)
return 0;
}
dest = info->params + dt_params[i].offset;
info->found++;
val = of_read_number(prop, len / sizeof(u32));
@ -390,10 +387,21 @@ static int __init fdt_find_uefi_params(unsigned long node, const char *uname,
int __init efi_get_fdt_params(struct efi_fdt_params *params, int verbose)
{
struct param_info info;
int ret;
pr_info("Getting EFI parameters from FDT:\n");
info.verbose = verbose;
info.found = 0;
info.params = params;
return of_scan_flat_dt(fdt_find_uefi_params, &info);
ret = of_scan_flat_dt(fdt_find_uefi_params, &info);
if (!info.found)
pr_info("UEFI not found.\n");
else if (!ret)
pr_err("Can't find '%s' in device tree!\n",
dt_params[info.found].name);
return ret;
}
#endif /* CONFIG_EFI_PARAMS_FROM_FDT */