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, 49 insertions, 0 deletions

diff --git a/include/sound/wm8996.h b/include/sound/wm8996.h
new file mode 100644
index 000000000..342abeef2
--- /dev/null
+++ b/include/sound/wm8996.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/sound/wm8996.h -- Platform data for WM8996
+ *
+ * Copyright 2011 Wolfson Microelectronics. PLC.
+ */
+
+#ifndef __LINUX_SND_WM8996_H
+#define __LINUX_SND_WM8996_H
+
+enum wm8996_inmode {
+	WM8996_DIFFERRENTIAL_1 = 0,   /* IN1xP - IN1xN */
+	WM8996_INVERTING = 1,         /* IN1xN */
+	WM8996_NON_INVERTING = 2,     /* IN1xP */
+	WM8996_DIFFERENTIAL_2 = 3,    /* IN2xP - IN2xP */
+};
+
+/**
+ * ReTune Mobile configurations are specified with a label, sample
+ * rate and set of values to write (the enable bits will be ignored).
+ *
+ * Configurations are expected to be generated using the ReTune Mobile
+ * control panel in WISCE - see http://www.wolfsonmicro.com/wisce/
+ */
+struct wm8996_retune_mobile_config {
+	const char *name;
+	int rate;
+	u16 regs[20];
+};
+
+#define WM8996_SET_DEFAULT 0x10000
+
+struct wm8996_pdata {
+	int irq_flags;  /** Set IRQ trigger flags; default active low */
+
+	int micdet_def;  /** Default MICDET_SRC/HP1FB_SRC/MICD_BIAS */
+
+	enum wm8996_inmode inl_mode;
+	enum wm8996_inmode inr_mode;
+
+	u32 spkmute_seq;  /** Value for register 0x802 */
+
+	u32 gpio_default[5];
+
+	int num_retune_mobile_cfgs;
+	struct wm8996_retune_mobile_config *retune_mobile_cfgs;
+};
+
+#endif