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author | 2022-06-17 19:00:06 +0200 | |
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committer | 2022-06-20 12:43:25 +0200 | |
commit | 0c4bad7f47c4e5ff82c82fbdd4f4ab3105b98fc9 (patch) | |
tree | 3fe301d53ee937eca7244837a13faff0b3d13d6a /drivers/net/wireless/intel/iwlwifi/fw | |
parent | media: atomisp_gmin_platform: stop abusing efivar API (diff) | |
download | linux-0c4bad7f47c4e5ff82c82fbdd4f4ab3105b98fc9.tar.gz linux-0c4bad7f47c4e5ff82c82fbdd4f4ab3105b98fc9.tar.bz2 linux-0c4bad7f47c4e5ff82c82fbdd4f4ab3105b98fc9.zip |
iwlwifi: Switch to proper EFI variable store interface
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.
Acked-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw')
-rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/uefi.c | 96 |
1 files 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..6d408cd0f517 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(-ENOENT); } 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(-ENOENT); } 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 */ |