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, 194 insertions, 0 deletions

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.h b/drivers/pinctrl/qcom/pinctrl-msm.h
new file mode 100644
index 000000000..b94ba1a41
--- /dev/null
+++ b/drivers/pinctrl/qcom/pinctrl-msm.h
@@ -0,0 +1,194 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2013, Sony Mobile Communications AB.
+ */
+#ifndef __PINCTRL_MSM_H__
+#define __PINCTRL_MSM_H__
+
+#include <linux/pm.h>
+#include <linux/types.h>
+
+#include <linux/pinctrl/pinctrl.h>
+
+struct platform_device;
+
+struct pinctrl_pin_desc;
+
+#define APQ_PIN_FUNCTION(fname)					\
+	[APQ_MUX_##fname] = PINCTRL_PINFUNCTION(#fname,		\
+					fname##_groups,		\
+					ARRAY_SIZE(fname##_groups))
+
+#define IPQ_PIN_FUNCTION(fname)					\
+	[IPQ_MUX_##fname] = PINCTRL_PINFUNCTION(#fname,		\
+					fname##_groups,		\
+					ARRAY_SIZE(fname##_groups))
+
+#define IPQ_GPIO_PIN_FUNCTION(fname)					\
+	[IPQ_MUX_##fname] = PINCTRL_GPIO_PINFUNCTION(#fname,		\
+					fname##_groups,		\
+					ARRAY_SIZE(fname##_groups))
+
+#define MSM_PIN_FUNCTION(fname) 				\
+	[msm_mux_##fname] = PINCTRL_PINFUNCTION(#fname,		\
+					fname##_groups,		\
+					ARRAY_SIZE(fname##_groups))
+
+#define MSM_GPIO_PIN_FUNCTION(fname)				\
+	[msm_mux_##fname] = PINCTRL_GPIO_PINFUNCTION(#fname,	\
+					fname##_groups,		\
+					ARRAY_SIZE(fname##_groups))
+
+#define QCA_PIN_FUNCTION(fname)					\
+	[qca_mux_##fname] = PINCTRL_PINFUNCTION(#fname,		\
+					fname##_groups,		\
+					ARRAY_SIZE(fname##_groups))
+
+#define QCA_GPIO_PIN_FUNCTION(fname)				\
+	[qca_mux_##fname] = PINCTRL_GPIO_PINFUNCTION(#fname,	\
+					fname##_groups,		\
+					ARRAY_SIZE(fname##_groups))
+
+/**
+ * struct msm_pingroup - Qualcomm pingroup definition
+ * @grp:                  Generic data of the pin group (name and pins)
+ * @funcs:                A list of pinmux functions that can be selected for
+ *                        this group. The index of the selected function is used
+ *                        for programming the function selector.
+ *                        Entries should be indices into the groups list of the
+ *                        struct msm_pinctrl_soc_data.
+ * @ctl_reg:              Offset of the register holding control bits for this group.
+ * @io_reg:               Offset of the register holding input/output bits for this group.
+ * @intr_cfg_reg:         Offset of the register holding interrupt configuration bits.
+ * @intr_status_reg:      Offset of the register holding the status bits for this group.
+ * @intr_target_reg:      Offset of the register specifying routing of the interrupts
+ *                        from this group. On most SoCs this register is the same as
+ *                        @intr_cfg_reg; leaving this field as zero causes the driver
+ *                        to fall back to @intr_cfg_reg automatically. Only set this
+ *                        explicitly on older SoCs where the interrupt target routing
+ *                        lives in a separate register (e.g. APQ8064, MSM8960).
+ * @mux_bit:              Offset in @ctl_reg for the pinmux function selection.
+ * @pull_bit:             Offset in @ctl_reg for the bias configuration.
+ * @drv_bit:              Offset in @ctl_reg for the drive strength configuration.
+ * @od_bit:               Offset in @ctl_reg for controlling open drain.
+ * @oe_bit:               Offset in @ctl_reg for controlling output enable.
+ * @in_bit:               Offset in @io_reg for the input bit value.
+ * @out_bit:              Offset in @io_reg for the output bit value.
+ * @intr_enable_bit:      Offset in @intr_cfg_reg for enabling the interrupt for this group.
+ * @intr_status_bit:      Offset in @intr_status_reg for reading and acking the interrupt
+ *                        status.
+ * @intr_wakeup_present_bit: Offset in @intr_target_reg specifying the GPIO can generate
+ *			  wakeup events.
+ * @intr_wakeup_enable_bit: Offset in @intr_target_reg to enable wakeup events for the GPIO.
+ * @intr_target_bit:      Offset in @intr_target_reg for configuring the interrupt routing.
+ * @intr_target_width:    Number of bits used for specifying interrupt routing target.
+ * @intr_target_kpss_val: Value in @intr_target_bit for specifying that the interrupt from
+ *                        this gpio should get routed to the KPSS processor.
+ * @intr_raw_status_bit:  Offset in @intr_cfg_reg for the raw status bit.
+ * @intr_polarity_bit:    Offset in @intr_cfg_reg for specifying polarity of the interrupt.
+ * @intr_detection_bit:   Offset in @intr_cfg_reg for specifying interrupt type.
+ * @intr_detection_width: Number of bits used for specifying interrupt type,
+ *                        Should be 2 for SoCs that can detect both edges in hardware,
+ *                        otherwise 1.
+ */
+struct msm_pingroup {
+	struct pingroup grp;
+
+	unsigned *funcs;
+	unsigned nfuncs;
+
+	u32 ctl_reg;
+	u32 io_reg;
+	u32 intr_cfg_reg;
+	u32 intr_status_reg;
+	u32 intr_target_reg;
+
+	unsigned int tile:2;
+
+	unsigned mux_bit:5;
+
+	unsigned pull_bit:5;
+	unsigned drv_bit:5;
+	unsigned i2c_pull_bit:5;
+
+	unsigned od_bit:5;
+	unsigned egpio_enable:5;
+	unsigned egpio_present:5;
+	unsigned oe_bit:5;
+	unsigned in_bit:5;
+	unsigned out_bit:5;
+
+	unsigned intr_enable_bit:5;
+	unsigned intr_status_bit:5;
+	unsigned intr_ack_high:1;
+
+	unsigned intr_wakeup_present_bit:5;
+	unsigned intr_wakeup_enable_bit:5;
+	unsigned intr_target_bit:5;
+	unsigned intr_target_width:5;
+	unsigned intr_target_kpss_val:5;
+	unsigned intr_raw_status_bit:5;
+	unsigned intr_polarity_bit:5;
+	unsigned intr_detection_bit:5;
+	unsigned intr_detection_width:5;
+};
+
+/**
+ * struct msm_gpio_wakeirq_map - Map of GPIOs and their wakeup pins
+ * @gpio:          The GPIOs that are wakeup capable
+ * @wakeirq:       The interrupt at the always-on interrupt controller
+ */
+struct msm_gpio_wakeirq_map {
+	unsigned int gpio;
+	unsigned int wakeirq;
+};
+
+/**
+ * struct msm_pinctrl_soc_data - Qualcomm pin controller driver configuration
+ * @pins:	    An array describing all pins the pin controller affects.
+ * @npins:	    The number of entries in @pins.
+ * @functions:	    An array describing all mux functions the SoC supports.
+ * @nfunctions:	    The number of entries in @functions.
+ * @groups:	    An array describing all pin groups the pin SoC supports.
+ * @ngroups:	    The numbmer of entries in @groups.
+ * @ngpio:	    The number of pingroups the driver should expose as GPIOs.
+ * @pull_no_keeper: The SoC does not support keeper bias.
+ * @wakeirq_map:    The map of wakeup capable GPIOs and the pin at PDC/MPM
+ * @nwakeirq_map:   The number of entries in @wakeirq_map
+ * @wakeirq_dual_edge_errata: If true then GPIOs using the wakeirq_map need
+ *                            to be aware that their parent can't handle dual
+ *                            edge interrupts.
+ * @gpio_func: Which function number is GPIO (usually 0).
+ * @egpio_func: If non-zero then this SoC supports eGPIO. Even though in
+ *              hardware this is a mux 1-level above the TLMM, we'll treat
+ *              it as if this is just another mux state of the TLMM. Since
+ *              it doesn't really map to hardware, we'll allocate a virtual
+ *              function number for eGPIO and any time we see that function
+ *              number used we'll treat it as a request to mux away from
+ *              our TLMM towards another owner.
+ */
+struct msm_pinctrl_soc_data {
+	const struct pinctrl_pin_desc *pins;
+	unsigned npins;
+	const struct pinfunction *functions;
+	unsigned nfunctions;
+	const struct msm_pingroup *groups;
+	unsigned ngroups;
+	unsigned ngpios;
+	bool pull_no_keeper;
+	const char *const *tiles;
+	unsigned int ntiles;
+	const int *reserved_gpios;
+	const struct msm_gpio_wakeirq_map *wakeirq_map;
+	unsigned int nwakeirq_map;
+	bool wakeirq_dual_edge_errata;
+	unsigned int gpio_func;
+	unsigned int egpio_func;
+};
+
+extern const struct dev_pm_ops msm_pinctrl_dev_pm_ops;
+
+int msm_pinctrl_probe(struct platform_device *pdev,
+		      const struct msm_pinctrl_soc_data *soc_data);
+
+#endif