Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 205 insertions, 0 deletions

diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
new file mode 100644
index 000000000..8f3c1b1c7
--- /dev/null
+++ b/drivers/bluetooth/btqca.h
@@ -0,0 +1,205 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  Bluetooth supports for Qualcomm Atheros ROME chips
+ *
+ *  Copyright (c) 2015 The Linux Foundation. All rights reserved.
+ */
+
+#define EDL_PATCH_CMD_OPCODE		0xFC00
+#define EDL_NVM_ACCESS_OPCODE		0xFC0B
+#define EDL_WRITE_BD_ADDR_OPCODE	0xFC14
+#define EDL_PATCH_CMD_LEN		1
+#define EDL_PATCH_VER_REQ_CMD		0x19
+#define EDL_PATCH_TLV_REQ_CMD		0x1E
+#define EDL_GET_BUILD_INFO_CMD		0x20
+#define EDL_GET_BID_REQ_CMD		0x23
+#define EDL_NVM_ACCESS_SET_REQ_CMD	0x01
+#define EDL_PATCH_CONFIG_CMD		0x28
+#define MAX_SIZE_PER_TLV_SEGMENT	243
+#define QCA_PRE_SHUTDOWN_CMD		0xFC08
+#define QCA_DISABLE_LOGGING		0xFC17
+
+#define EDL_CMD_REQ_RES_EVT		0x00
+#define EDL_PATCH_VER_RES_EVT		0x19
+#define EDL_APP_VER_RES_EVT		0x02
+#define EDL_TVL_DNLD_RES_EVT		0x04
+#define EDL_CMD_EXE_STATUS_EVT		0x00
+#define EDL_SET_BAUDRATE_RSP_EVT	0x92
+#define EDL_NVM_ACCESS_CODE_EVT		0x0B
+#define EDL_PATCH_CONFIG_RES_EVT	0x00
+#define QCA_DISABLE_LOGGING_SUB_OP	0x14
+
+#define EDL_TAG_ID_BD_ADDR		2
+#define EDL_TAG_ID_HCI			17
+#define EDL_TAG_ID_DEEP_SLEEP		27
+
+#define QCA_WCN3990_POWERON_PULSE	0xFC
+#define QCA_WCN3990_POWEROFF_PULSE	0xC0
+
+#define QCA_HCI_CC_OPCODE		0xFC00
+#define QCA_HCI_CC_SUCCESS		0x00
+
+#define QCA_WCN3991_SOC_ID		0x40014320
+
+#define QCA_WCN3950_SOC_ID_T		0x40074130
+#define QCA_WCN3950_SOC_ID_S		0x40075130
+
+/* QCA chipset version can be decided by patch and SoC
+ * version, combination with upper 2 bytes from SoC
+ * and lower 2 bytes from patch will be used.
+ */
+#define get_soc_ver(soc_id, rom_ver)	\
+	((le32_to_cpu(soc_id) << 16) | (le16_to_cpu(rom_ver)))
+
+#define QCA_HSP_GF_SOC_ID		0x1200
+#define QCA_HSP_GF_SOC_MASK		0x0000ff00
+
+enum qca_baudrate {
+	QCA_BAUDRATE_115200	= 0,
+	QCA_BAUDRATE_57600,
+	QCA_BAUDRATE_38400,
+	QCA_BAUDRATE_19200,
+	QCA_BAUDRATE_9600,
+	QCA_BAUDRATE_230400,
+	QCA_BAUDRATE_250000,
+	QCA_BAUDRATE_460800,
+	QCA_BAUDRATE_500000,
+	QCA_BAUDRATE_720000,
+	QCA_BAUDRATE_921600,
+	QCA_BAUDRATE_1000000,
+	QCA_BAUDRATE_1250000,
+	QCA_BAUDRATE_2000000,
+	QCA_BAUDRATE_3000000,
+	QCA_BAUDRATE_4000000,
+	QCA_BAUDRATE_1600000,
+	QCA_BAUDRATE_3200000,
+	QCA_BAUDRATE_3500000,
+	QCA_BAUDRATE_AUTO	= 0xFE,
+	QCA_BAUDRATE_RESERVED
+};
+
+enum qca_tlv_dnld_mode {
+	QCA_SKIP_EVT_NONE,
+	QCA_SKIP_EVT_VSE,
+	QCA_SKIP_EVT_CC,
+	QCA_SKIP_EVT_VSE_CC
+};
+
+enum qca_tlv_type {
+	TLV_TYPE_PATCH = 1,
+	TLV_TYPE_NVM,
+	ELF_TYPE_PATCH,
+};
+
+struct qca_fw_config {
+	u8 type;
+	char fwname[64];
+	uint8_t user_baud_rate;
+	enum qca_tlv_dnld_mode dnld_mode;
+	enum qca_tlv_dnld_mode dnld_type;
+	bdaddr_t bdaddr;
+};
+
+struct edl_event_hdr {
+	__u8 cresp;
+	__u8 rtype;
+	__u8 data[];
+} __packed;
+
+struct qca_btsoc_version {
+	__le32 product_id;
+	__le16 patch_ver;
+	__le16 rom_ver;
+	__le32 soc_id;
+} __packed;
+
+struct tlv_seg_resp {
+	__u8 result;
+} __packed;
+
+struct tlv_type_patch {
+	__le32 total_size;
+	__le32 data_length;
+	__u8   format_version;
+	__u8   signature;
+	__u8   download_mode;
+	__u8   reserved1;
+	__le16 product_id;
+	__le16 rom_build;
+	__le16 patch_version;
+	__le16 reserved2;
+	__le32 entry;
+} __packed;
+
+struct tlv_type_nvm {
+	__le16 tag_id;
+	__le16 tag_len;
+	__le32 reserve1;
+	__le32 reserve2;
+	__u8   data[];
+} __packed;
+
+struct tlv_type_hdr {
+	__le32 type_len;
+	__u8   data[];
+} __packed;
+
+enum qca_btsoc_type {
+	QCA_INVALID = -1,
+	QCA_AR3002,
+	QCA_ROME,
+	QCA_WCN3950,
+	QCA_WCN3988,
+	QCA_WCN3990,
+	QCA_WCN3998,
+	QCA_WCN3991,
+	QCA_QCA2066,
+	QCA_QCA6390,
+	QCA_WCN6750,
+	QCA_WCN6855,
+	QCA_WCN7850,
+};
+
+#if IS_ENABLED(CONFIG_BT_QCA)
+
+int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr);
+int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
+		   enum qca_btsoc_type soc_type, struct qca_btsoc_version ver,
+		   const char *firmware_name, const char *rampatch_name);
+int qca_read_soc_version(struct hci_dev *hdev, struct qca_btsoc_version *ver,
+			 enum qca_btsoc_type);
+int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr);
+int qca_send_pre_shutdown_cmd(struct hci_dev *hdev);
+#else
+
+static inline int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
+				 enum qca_btsoc_type soc_type,
+				 struct qca_btsoc_version ver,
+				 const char *firmware_name,
+				 const char *rampatch_name)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int qca_read_soc_version(struct hci_dev *hdev,
+				       struct qca_btsoc_version *ver,
+				       enum qca_btsoc_type)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
+{
+	return -EOPNOTSUPP;
+}
+#endif