From 27600805e62f800bacf990354632eae4e487d34c Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Thu, 3 Sep 2026 10:43:25 -0500 Subject: x86/amd_node: Fix PCI device reference counting in amd_smn_init() 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 Assisted-by: LLM Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Mario Limonciello (AMD) Cc: Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com --- include/sound/sdca_fdl.h | 111 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 include/sound/sdca_fdl.h (limited to 'include/sound/sdca_fdl.h') diff --git a/include/sound/sdca_fdl.h b/include/sound/sdca_fdl.h new file mode 100644 index 000000000..bc3600cdd --- /dev/null +++ b/include/sound/sdca_fdl.h @@ -0,0 +1,111 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * The MIPI SDCA specification is available for public downloads at + * https://www.mipi.org/mipi-sdca-v1-0-download + * + * Copyright (C) 2025 Cirrus Logic, Inc. and + * Cirrus Logic International Semiconductor Ltd. + */ + +#ifndef __SDCA_FDL_H__ +#define __SDCA_FDL_H__ + +#include +#include + +struct device; +struct regmap; +struct sdca_fdl_set; +struct sdca_function_data; +struct sdca_interrupt; +struct sdca_interrupt_info; + +/** + * struct fdl_state - FDL state structure to keep data between interrupts + * @begin: Completion indicating the start of an FDL download cycle. + * @done: Completion indicating the end of an FDL download cycle. + * @timeout: Delayed work used for timing out UMP transactions. + * @lock: Mutex to protect between the timeout work and IRQ handlers. + * @interrupt: Pointer to the interrupt struct to which this FDL is attached. + * @set: Pointer to the FDL set currently being downloaded. + * @file_index: Index of the current file being processed. + */ +struct fdl_state { + struct completion begin; + struct completion done; + struct delayed_work timeout; + struct mutex lock; + + struct sdca_interrupt *interrupt; + struct sdca_fdl_set *set; + int file_index; +}; + +#define SDCA_CTL_XU_FDLH_COMPLETE 0 +#define SDCA_CTL_XU_FDLH_MORE_FILES SDCA_CTL_XU_FDLH_SET_IN_PROGRESS +#define SDCA_CTL_XU_FDLH_FILE_AVAILABLE (SDCA_CTL_XU_FDLH_TRANSFERRED_FILE | \ + SDCA_CTL_XU_FDLH_SET_IN_PROGRESS) +#define SDCA_CTL_XU_FDLH_MASK (SDCA_CTL_XU_FDLH_TRANSFERRED_CHUNK | \ + SDCA_CTL_XU_FDLH_TRANSFERRED_FILE | \ + SDCA_CTL_XU_FDLH_SET_IN_PROGRESS | \ + SDCA_CTL_XU_FDLH_RESET_ACK | \ + SDCA_CTL_XU_FDLH_REQ_ABORT) + +#define SDCA_CTL_XU_FDLD_COMPLETE 0 +#define SDCA_CTL_XU_FDLD_FILE_OK (SDCA_CTL_XU_FDLH_TRANSFERRED_FILE | \ + SDCA_CTL_XU_FDLH_SET_IN_PROGRESS | \ + SDCA_CTL_XU_FDLD_ACK_TRANSFER | \ + SDCA_CTL_XU_FDLD_NEEDS_SET) +#define SDCA_CTL_XU_FDLD_MORE_FILES_OK (SDCA_CTL_XU_FDLH_SET_IN_PROGRESS | \ + SDCA_CTL_XU_FDLD_ACK_TRANSFER | \ + SDCA_CTL_XU_FDLD_NEEDS_SET) +#define SDCA_CTL_XU_FDLD_MASK (SDCA_CTL_XU_FDLD_REQ_RESET | \ + SDCA_CTL_XU_FDLD_REQ_ABORT | \ + SDCA_CTL_XU_FDLD_ACK_TRANSFER | \ + SDCA_CTL_XU_FDLD_NEEDS_SET) + +#if IS_ENABLED(CONFIG_SND_SOC_SDCA_FDL) + +int sdca_fdl_alloc_state(struct sdca_interrupt *interrupt); +void sdca_fdl_free_state(struct sdca_interrupt *interrupt); + +int sdca_fdl_process(struct sdca_interrupt *interrupt); +int sdca_fdl_sync(struct device *dev, struct sdca_function_data *function, + struct sdca_interrupt_info *info); + +int sdca_reset_function(struct device *dev, struct sdca_function_data *function, + struct regmap *regmap); + +#else + +static inline int sdca_fdl_alloc_state(struct sdca_interrupt *interrupt) +{ + return 0; +} + +static inline void sdca_fdl_free_state(struct sdca_interrupt *interrupt) +{ +} + +static inline int sdca_fdl_process(struct sdca_interrupt *interrupt) +{ + return 0; +} + +static inline int sdca_fdl_sync(struct device *dev, + struct sdca_function_data *function, + struct sdca_interrupt_info *info) +{ + return 0; +} + +static inline int sdca_reset_function(struct device *dev, + struct sdca_function_data *function, + struct regmap *regmap) +{ + return 0; +} + +#endif // CONFIG_SND_SOC_SDCA_FDL + +#endif // __SDCA_FDL_H__ -- cgit v1.3.1