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, 114 insertions, 0 deletions

diff --git a/drivers/input/mouse/sentelic.h b/drivers/input/mouse/sentelic.h
new file mode 100644
index 000000000..02cac0e7a
--- /dev/null
+++ b/drivers/input/mouse/sentelic.h
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*-
+ * Finger Sensing Pad PS/2 mouse driver.
+ *
+ * Copyright (C) 2005-2007 Asia Vital Components Co., Ltd.
+ * Copyright (C) 2005-2012 Tai-hwa Liang, Sentelic Corporation.
+ */
+
+#ifndef	__SENTELIC_H
+#define	__SENTELIC_H
+
+/* Finger-sensing Pad information registers */
+#define	FSP_REG_DEVICE_ID	0x00
+#define	FSP_REG_VERSION		0x01
+#define	FSP_REG_REVISION	0x04
+#define	FSP_REG_TMOD_STATUS1	0x0B
+#define	FSP_BIT_NO_ROTATION	BIT(3)
+#define	FSP_REG_PAGE_CTRL	0x0F
+
+/* Finger-sensing Pad control registers */
+#define	FSP_REG_SYSCTL1		0x10
+#define	FSP_BIT_EN_REG_CLK	BIT(5)
+#define	FSP_REG_TMOD_STATUS	0x20
+#define	FSP_REG_OPC_QDOWN	0x31
+#define	FSP_BIT_EN_OPC_TAG	BIT(7)
+#define	FSP_REG_OPTZ_XLO	0x34
+#define	FSP_REG_OPTZ_XHI	0x35
+#define	FSP_REG_OPTZ_YLO	0x36
+#define	FSP_REG_OPTZ_YHI	0x37
+#define	FSP_REG_SYSCTL5		0x40
+#define	FSP_BIT_90_DEGREE	BIT(0)
+#define	FSP_BIT_EN_MSID6	BIT(1)
+#define	FSP_BIT_EN_MSID7	BIT(2)
+#define	FSP_BIT_EN_MSID8	BIT(3)
+#define	FSP_BIT_EN_AUTO_MSID8	BIT(5)
+#define	FSP_BIT_EN_PKT_G0	BIT(6)
+
+#define	FSP_REG_ONPAD_CTL	0x43
+#define	FSP_BIT_ONPAD_ENABLE	BIT(0)
+#define	FSP_BIT_ONPAD_FBBB	BIT(1)
+#define	FSP_BIT_FIX_VSCR	BIT(3)
+#define	FSP_BIT_FIX_HSCR	BIT(5)
+#define	FSP_BIT_DRAG_LOCK	BIT(6)
+
+#define	FSP_REG_SWC1		(0x90)
+#define	FSP_BIT_SWC1_EN_ABS_1F	BIT(0)
+#define	FSP_BIT_SWC1_EN_GID	BIT(1)
+#define	FSP_BIT_SWC1_EN_ABS_2F	BIT(2)
+#define	FSP_BIT_SWC1_EN_FUP_OUT	BIT(3)
+#define	FSP_BIT_SWC1_EN_ABS_CON	BIT(4)
+#define	FSP_BIT_SWC1_GST_GRP0	BIT(5)
+#define	FSP_BIT_SWC1_GST_GRP1	BIT(6)
+#define	FSP_BIT_SWC1_BX_COMPAT	BIT(7)
+
+#define	FSP_PAGE_0B		(0x0b)
+#define	FSP_PAGE_82		(0x82)
+#define	FSP_PAGE_DEFAULT	FSP_PAGE_82
+
+#define	FSP_REG_SN0		(0x40)
+#define	FSP_REG_SN1		(0x41)
+#define	FSP_REG_SN2		(0x42)
+
+/* Finger-sensing Pad packet formating related definitions */
+
+/* absolute packet type */
+#define	FSP_PKT_TYPE_NORMAL	(0x00)
+#define	FSP_PKT_TYPE_ABS	(0x01)
+#define	FSP_PKT_TYPE_NOTIFY	(0x02)
+#define	FSP_PKT_TYPE_NORMAL_OPC	(0x03)
+#define	FSP_PKT_TYPE_SHIFT	(6)
+
+/* bit definitions for the first byte of report packet */
+#define	FSP_PB0_LBTN		BIT(0)
+#define	FSP_PB0_RBTN		BIT(1)
+#define	FSP_PB0_MBTN		BIT(2)
+#define	FSP_PB0_MFMC_FGR2	FSP_PB0_MBTN
+#define	FSP_PB0_MUST_SET	BIT(3)
+#define	FSP_PB0_PHY_BTN		BIT(4)
+#define	FSP_PB0_MFMC		BIT(5)
+
+/* hardware revisions */
+#define	FSP_VER_STL3888_A4	(0xC1)
+#define	FSP_VER_STL3888_B0	(0xD0)
+#define	FSP_VER_STL3888_B1	(0xD1)
+#define	FSP_VER_STL3888_B2	(0xD2)
+#define	FSP_VER_STL3888_C0	(0xE0)
+#define	FSP_VER_STL3888_C1	(0xE1)
+#define	FSP_VER_STL3888_D0	(0xE2)
+#define	FSP_VER_STL3888_D1	(0xE3)
+#define	FSP_VER_STL3888_E0	(0xE4)
+
+#ifdef __KERNEL__
+
+struct fsp_data {
+	unsigned char	ver;		/* hardware version */
+	unsigned char	rev;		/* hardware revison */
+	unsigned int	buttons;	/* Number of buttons */
+	unsigned int	flags;
+#define	FSPDRV_FLAG_EN_OPC	(0x001)	/* enable on-pad clicking */
+
+	bool		vscroll;	/* Vertical scroll zone enabled */
+	bool		hscroll;	/* Horizontal scroll zone enabled */
+
+	unsigned char	last_reg;	/* Last register we requested read from */
+	unsigned char	last_val;
+	unsigned int	last_mt_fgr;	/* Last seen finger(multitouch) */
+};
+
+extern int fsp_detect(struct psmouse *psmouse, bool set_properties);
+extern int fsp_init(struct psmouse *psmouse);
+
+#endif	/* __KERNEL__ */
+
+#endif	/* !__SENTELIC_H */