x86/amd_node: Fix PCI device reference counting in amd_smn_init()grafted

The local "root" pointer is a temporary variable used during the device
search. Therefore, refcount related to the search iterators should be cleaned
up after the search is complete.

Use the __free() cleanup macro to ensure the refcount is decremented when the
temporary pointer goes out of scope.

Additionally, increment the refcount when caching a root pointer. This ensures
the in-use refcount is separate from the temporary search refcounting.

Finally, drop the redundant "root = NULL" before the second search loop. The
pci_get_class() iterator always decrements the refcount of its "from"
argument, so the first loop can only fall through with "root" already NULL.

Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching")
Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com
Reported-by: Sashiko <sashiko-bot@kernel.org>
Assisted-by: LLM
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Cc: <stable@kernel.org>
Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com

1 files changed, 51 insertions, 0 deletions

diff --git a/include/sound/da7219.h b/include/sound/da7219.h
new file mode 100644
index 000000000..dde4542b0
--- /dev/null
+++ b/include/sound/da7219.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * da7219.h - DA7219 ASoC Codec Driver Platform Data
+ *
+ * Copyright (c) 2015 Dialog Semiconductor
+ *
+ * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
+ */
+
+#ifndef __DA7219_PDATA_H
+#define __DA7219_PDATA_H
+
+/* Mic Bias */
+enum da7219_micbias_voltage {
+	DA7219_MICBIAS_1_6V = 0,
+	DA7219_MICBIAS_1_8V,
+	DA7219_MICBIAS_2_0V,
+	DA7219_MICBIAS_2_2V,
+	DA7219_MICBIAS_2_4V,
+	DA7219_MICBIAS_2_6V,
+};
+
+/* Mic input type */
+enum da7219_mic_amp_in_sel {
+	DA7219_MIC_AMP_IN_SEL_DIFF = 0,
+	DA7219_MIC_AMP_IN_SEL_SE_P,
+	DA7219_MIC_AMP_IN_SEL_SE_N,
+};
+
+struct da7219_aad_pdata;
+
+enum da7219_dai_clks {
+	DA7219_DAI_WCLK_IDX = 0,
+	DA7219_DAI_BCLK_IDX,
+	DA7219_DAI_NUM_CLKS,
+};
+
+struct da7219_pdata {
+	bool wakeup_source;
+
+	const char *dai_clk_names[DA7219_DAI_NUM_CLKS];
+
+	/* Mic */
+	enum da7219_micbias_voltage micbias_lvl;
+	enum da7219_mic_amp_in_sel mic_amp_in_sel;
+
+	/* AAD */
+	struct da7219_aad_pdata *aad_pdata;
+};
+
+#endif /* __DA7219_PDATA_H */