Using half of the efivar API with locally baked efivar_entry instances
is not the right way to use this API, and these uses impede planned work
on the efivar layer itself.
So switch to direct EFI variable store accesses: we don't need the
efivar layer anyway.
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/fw/uefi.c | 96 +++++++-------------
1 file changed, 32 insertions(+), 64 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
index 23b1d689ba7b..9854466c21d9 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
@@ -19,20 +19,14 @@
void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)
{
- struct efivar_entry *pnvm_efivar;
void *data;
unsigned long package_size;
- int err;
+ efi_status_t status;
*len = 0;
- pnvm_efivar = kzalloc(sizeof(*pnvm_efivar), GFP_KERNEL);
- if (!pnvm_efivar)
- return ERR_PTR(-ENOMEM);
-
- memcpy(&pnvm_efivar->var.VariableName, IWL_UEFI_OEM_PNVM_NAME,
- sizeof(IWL_UEFI_OEM_PNVM_NAME));
- pnvm_efivar->var.VendorGuid = IWL_EFI_VAR_GUID;
+ if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
+ return ERR_PTR(-ENODEV);
/*
* TODO: we hardcode a maximum length here, because reading
@@ -42,27 +36,22 @@ void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)
package_size = IWL_HARDCODED_PNVM_SIZE;
data = kmalloc(package_size, GFP_KERNEL);
- if (!data) {
- data = ERR_PTR(-ENOMEM);
- goto out;
- }
+ if (!data)
+ return ERR_PTR(-ENOMEM);
- err = efivar_entry_get(pnvm_efivar, NULL, &package_size, data);
- if (err) {
+ status = efi.get_variable(IWL_UEFI_OEM_PNVM_NAME, &IWL_EFI_VAR_GUID,
+ NULL, &package_size, data);
+ if (status != EFI_SUCCESS) {
IWL_DEBUG_FW(trans,
- "PNVM UEFI variable not found %d (len %lu)\n",
- err, package_size);
+ "PNVM UEFI variable not found 0x%lx (len %lu)\n",
+ status, package_size);
kfree(data);
- data = ERR_PTR(err);
- goto out;
+ return ERR_PTR(efi_status_to_err(status));
}
IWL_DEBUG_FW(trans, "Read PNVM from UEFI with size %lu\n", package_size);
*len = package_size;
-out:
- kfree(pnvm_efivar);
-
return data;
}
@@ -211,21 +200,15 @@ static void *iwl_uefi_reduce_power_parse(struct iwl_trans *trans,
void *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)
{
- struct efivar_entry *reduce_power_efivar;
struct pnvm_sku_package *package;
void *data = NULL;
unsigned long package_size;
- int err;
+ efi_status_t status;
*len = 0;
- reduce_power_efivar = kzalloc(sizeof(*reduce_power_efivar), GFP_KERNEL);
- if (!reduce_power_efivar)
- return ERR_PTR(-ENOMEM);
-
- memcpy(&reduce_power_efivar->var.VariableName, IWL_UEFI_REDUCED_POWER_NAME,
- sizeof(IWL_UEFI_REDUCED_POWER_NAME));
- reduce_power_efivar->var.VendorGuid = IWL_EFI_VAR_GUID;
+ if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
+ return ERR_PTR(-ENODEV);
/*
* TODO: we hardcode a maximum length here, because reading
@@ -235,19 +218,17 @@ void *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)
package_size = IWL_HARDCODED_REDUCE_POWER_SIZE;
package = kmalloc(package_size, GFP_KERNEL);
- if (!package) {
- package = ERR_PTR(-ENOMEM);
- goto out;
- }
+ if (!package)
+ return ERR_PTR(-ENOMEM);
- err = efivar_entry_get(reduce_power_efivar, NULL, &package_size, package);
- if (err) {
+ status = efi.get_variable(IWL_UEFI_REDUCED_POWER_NAME, &IWL_EFI_VAR_GUID,
+ NULL, &package_size, data);
+ if (status != EFI_SUCCESS) {
IWL_DEBUG_FW(trans,
- "Reduced Power UEFI variable not found %d (len %lu)\n",
- err, package_size);
+ "Reduced Power UEFI variable not found 0x%lx (len %lu)\n",
+ status, package_size);
kfree(package);
- data = ERR_PTR(err);
- goto out;
+ return ERR_PTR(efi_status_to_err(status));
}
IWL_DEBUG_FW(trans, "Read reduced power from UEFI with size %lu\n",
@@ -262,9 +243,6 @@ void *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)
kfree(package);
-out:
- kfree(reduce_power_efivar);
-
return data;
}
@@ -304,22 +282,15 @@ static int iwl_uefi_sgom_parse(struct uefi_cnv_wlan_sgom_data *sgom_data,
void iwl_uefi_get_sgom_table(struct iwl_trans *trans,
struct iwl_fw_runtime *fwrt)
{
- struct efivar_entry *sgom_efivar;
struct uefi_cnv_wlan_sgom_data *data;
unsigned long package_size;
- int err, ret;
-
- if (!fwrt->geo_enabled)
- return;
+ efi_status_t status;
+ int ret;
- sgom_efivar = kzalloc(sizeof(*sgom_efivar), GFP_KERNEL);
- if (!sgom_efivar)
+ if (!fwrt->geo_enabled ||
+ !efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
return;
- memcpy(&sgom_efivar->var.VariableName, IWL_UEFI_SGOM_NAME,
- sizeof(IWL_UEFI_SGOM_NAME));
- sgom_efivar->var.VendorGuid = IWL_EFI_VAR_GUID;
-
/* TODO: we hardcode a maximum length here, because reading
* from the UEFI is not working. To implement this properly,
* we have to call efivar_entry_size().
@@ -327,15 +298,14 @@ void iwl_uefi_get_sgom_table(struct iwl_trans *trans,
package_size = IWL_HARDCODED_SGOM_SIZE;
data = kmalloc(package_size, GFP_KERNEL);
- if (!data) {
- data = ERR_PTR(-ENOMEM);
- goto out;
- }
+ if (!data)
+ return;
- err = efivar_entry_get(sgom_efivar, NULL, &package_size, data);
- if (err) {
+ status = efi.get_variable(IWL_UEFI_SGOM_NAME, &IWL_EFI_VAR_GUID,
+ NULL, &package_size, data);
+ if (status != EFI_SUCCESS) {
IWL_DEBUG_FW(trans,
- "SGOM UEFI variable not found %d\n", err);
+ "SGOM UEFI variable not found 0x%lx\n", status);
goto out_free;
}
@@ -349,8 +319,6 @@ void iwl_uefi_get_sgom_table(struct iwl_trans *trans,
out_free:
kfree(data);
-out:
- kfree(sgom_efivar);
}
IWL_EXPORT_SYMBOL(iwl_uefi_get_sgom_table);
#endif /* CONFIG_ACPI */
--
2.35.1
