a3e620f842
The machine_quirk may return NULL which means the acpi entries should be skipped and search for next matched entry is needed, here add return check here and continue for NULL case. Signed-off-by: Keyon Jie <yang.jie@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// soc-apci.c - support for ACPI enumeration.
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//
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// Copyright (c) 2013-15, Intel Corporation.
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#include <sound/soc-acpi.h>
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struct snd_soc_acpi_mach *
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snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines)
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{
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struct snd_soc_acpi_mach *mach;
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struct snd_soc_acpi_mach *mach_alt;
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for (mach = machines; mach->id[0]; mach++) {
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if (acpi_dev_present(mach->id, NULL, -1)) {
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if (mach->machine_quirk) {
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mach_alt = mach->machine_quirk(mach);
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if (!mach_alt)
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continue; /* not full match, ignore */
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mach = mach_alt;
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}
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return mach;
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}
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}
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return NULL;
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}
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EXPORT_SYMBOL_GPL(snd_soc_acpi_find_machine);
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static acpi_status snd_soc_acpi_find_package(acpi_handle handle, u32 level,
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void *context, void **ret)
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{
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struct acpi_device *adev;
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acpi_status status = AE_OK;
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struct snd_soc_acpi_package_context *pkg_ctx = context;
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pkg_ctx->data_valid = false;
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if (acpi_bus_get_device(handle, &adev))
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return AE_OK;
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if (adev->status.present && adev->status.functional) {
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struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
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union acpi_object *myobj = NULL;
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status = acpi_evaluate_object_typed(handle, pkg_ctx->name,
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NULL, &buffer,
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ACPI_TYPE_PACKAGE);
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if (ACPI_FAILURE(status))
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return AE_OK;
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myobj = buffer.pointer;
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if (!myobj || myobj->package.count != pkg_ctx->length) {
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kfree(buffer.pointer);
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return AE_OK;
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}
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status = acpi_extract_package(myobj,
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pkg_ctx->format, pkg_ctx->state);
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if (ACPI_FAILURE(status)) {
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kfree(buffer.pointer);
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return AE_OK;
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}
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kfree(buffer.pointer);
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pkg_ctx->data_valid = true;
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return AE_CTRL_TERMINATE;
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}
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return AE_OK;
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}
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bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
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struct snd_soc_acpi_package_context *ctx)
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{
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acpi_status status;
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status = acpi_get_devices(hid, snd_soc_acpi_find_package, ctx, NULL);
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if (ACPI_FAILURE(status) || !ctx->data_valid)
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return false;
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return true;
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}
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EXPORT_SYMBOL_GPL(snd_soc_acpi_find_package_from_hid);
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struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
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{
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struct snd_soc_acpi_mach *mach = arg;
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struct snd_soc_acpi_codecs *codec_list =
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(struct snd_soc_acpi_codecs *) mach->quirk_data;
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int i;
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if (mach->quirk_data == NULL)
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return mach;
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for (i = 0; i < codec_list->num_codecs; i++) {
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if (!acpi_dev_present(codec_list->codecs[i], NULL, -1))
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return NULL;
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}
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return mach;
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}
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EXPORT_SYMBOL_GPL(snd_soc_acpi_codec_list);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("ALSA SoC ACPI module");
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