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, 179 insertions, 0 deletions

diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig
new file mode 100644
index 000000000..676fb7dff
--- /dev/null
+++ b/drivers/net/dsa/Kconfig
@@ -0,0 +1,179 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menu "Distributed Switch Architecture drivers"
+	depends on NET_DSA
+
+source "drivers/net/dsa/b53/Kconfig"
+
+config NET_DSA_BCM_SF2
+	tristate "Broadcom Starfighter 2 Ethernet switch support"
+	depends on HAS_IOMEM
+	select NET_DSA_TAG_BRCM
+	select FIXED_PHY
+	select BCM7XXX_PHY
+	select MDIO_BCM_UNIMAC
+	select B53
+	help
+	  This enables support for the Broadcom Starfighter 2 Ethernet
+	  switch chips.
+
+config NET_DSA_LOOP
+	tristate "DSA mock-up Ethernet switch chip support"
+	select NET_DSA_TAG_NONE
+	select FIXED_PHY
+	help
+	  This enables support for a fake mock-up switch chip which
+	  exercises the DSA APIs.
+
+source "drivers/net/dsa/hirschmann/Kconfig"
+
+source "drivers/net/dsa/lantiq/Kconfig"
+
+config NET_DSA_MT7530
+	tristate "MediaTek MT7530 and MT7531 Ethernet switch support"
+	select NET_DSA_TAG_MTK
+	select REGMAP_IRQ
+	imply NET_DSA_MT7530_MDIO
+	imply NET_DSA_MT7530_MMIO
+	help
+	  This enables support for the MediaTek MT7530 and MT7531 Ethernet
+	  switch chips. Multi-chip module MT7530 in MT7621AT, MT7621DAT,
+	  MT7621ST and MT7623AI SoCs, and built-in switch in MT7988 SoC are
+	  supported as well.
+
+config NET_DSA_MT7530_MDIO
+	tristate "MediaTek MT7530 MDIO interface driver"
+	depends on NET_DSA_MT7530
+	select MEDIATEK_GE_PHY
+	select PCS_MTK_LYNXI
+	help
+	  This enables support for the MediaTek MT7530 and MT7531 switch
+	  chips which are connected via MDIO, as well as multi-chip
+	  module MT7530 which can be found in the MT7621AT, MT7621DAT,
+	  MT7621ST and MT7623AI SoCs.
+
+config NET_DSA_MT7530_MMIO
+	tristate "MediaTek MT7530 MMIO interface driver"
+	depends on NET_DSA_MT7530
+	depends on HAS_IOMEM
+	imply MEDIATEK_GE_SOC_PHY
+	help
+	  This enables support for the built-in Ethernet switch found
+	  in the MediaTek MT7988 SoC.
+	  The switch is a similar design as MT7531, but the switch registers
+	  are directly mapped into the SoCs register space rather than being
+	  accessible via MDIO.
+
+config NET_DSA_MT7628
+	tristate "MediaTek MT7628 Embedded Ethernet switch support"
+	depends on HAS_IOMEM && (SOC_MT7620 || COMPILE_TEST)
+	select NET_DSA_TAG_MT7628
+	select MEDIATEK_FE_SOC_PHY
+	select REGMAP_MMIO
+	help
+	  This enables support for the built-in Ethernet switch found
+	  in the MT7628 SoC.
+
+config NET_DSA_MV88E6060
+	tristate "Marvell 88E6060 ethernet switch chip support"
+	select NET_DSA_TAG_TRAILER
+	help
+	  This enables support for the Marvell 88E6060 ethernet switch
+	  chip.
+
+source "drivers/net/dsa/microchip/Kconfig"
+
+source "drivers/net/dsa/mv88e6xxx/Kconfig"
+
+source "drivers/net/dsa/mxl862xx/Kconfig"
+
+source "drivers/net/dsa/netc/Kconfig"
+
+source "drivers/net/dsa/ocelot/Kconfig"
+
+source "drivers/net/dsa/qca/Kconfig"
+
+source "drivers/net/dsa/sja1105/Kconfig"
+
+source "drivers/net/dsa/xrs700x/Kconfig"
+
+source "drivers/net/dsa/realtek/Kconfig"
+
+config NET_DSA_RZN1_A5PSW
+	tristate "Renesas RZ/N1 A5PSW Ethernet switch support"
+	depends on OF && (ARCH_RZN1 || COMPILE_TEST)
+	select NET_DSA_TAG_RZN1_A5PSW
+	select PCS_RZN1_MIIC
+	help
+	  This driver supports the A5PSW switch, which is embedded in Renesas
+	  RZ/N1 SoC.
+
+config NET_DSA_KS8995
+	tristate "Micrel KS8995 family 5-ports 10/100 Ethernet switches"
+	depends on SPI
+	select NET_DSA_TAG_NONE
+	help
+	  This driver supports the Micrel KS8995 family of 10/100 Mbit ethernet
+	  switches, managed over SPI.
+
+config NET_DSA_SMSC_LAN9303
+	tristate
+	select NET_DSA_TAG_LAN9303
+	select REGMAP
+	imply SMSC_PHY
+	help
+	  This enables support for the Microchip LAN9303/LAN9354 3 port ethernet
+	  switch chips.
+
+config NET_DSA_SMSC_LAN9303_I2C
+	tristate "SMSC/Microchip LAN9303 3-ports 10/100 ethernet switch in I2C managed mode"
+	depends on I2C
+	depends on VLAN_8021Q || VLAN_8021Q=n
+	select NET_DSA_SMSC_LAN9303
+	select REGMAP_I2C
+	help
+	  Enable access functions if the SMSC/Microchip LAN9303 is configured
+	  for I2C managed mode.
+
+config NET_DSA_SMSC_LAN9303_MDIO
+	tristate "Microchip LAN9303/LAN9354 3-ports 10/100 ethernet switch in MDIO managed mode"
+	select NET_DSA_SMSC_LAN9303
+	depends on VLAN_8021Q || VLAN_8021Q=n
+	help
+	  Enable access functions if the Microchip LAN9303/LAN9354 is configured
+	  for MDIO managed mode.
+
+config NET_DSA_VITESSE_VSC73XX
+	tristate
+	select NET_DSA_TAG_VSC73XX_8021Q
+	select FIXED_PHY
+	select VITESSE_PHY
+	select GPIOLIB
+	help
+	  This enables support for the Vitesse VSC7385, VSC7388,
+	  VSC7395 and VSC7398 SparX integrated ethernet switches.
+
+config NET_DSA_VITESSE_VSC73XX_SPI
+	tristate "Vitesse VSC7385/7388/7395/7398 SPI mode support"
+	depends on SPI
+	select NET_DSA_VITESSE_VSC73XX
+	help
+	  This enables support for the Vitesse VSC7385, VSC7388, VSC7395
+	  and VSC7398 SparX integrated ethernet switches in SPI managed mode.
+
+config NET_DSA_VITESSE_VSC73XX_PLATFORM
+	tristate "Vitesse VSC7385/7388/7395/7398 Platform mode support"
+	depends on HAS_IOMEM
+	select NET_DSA_VITESSE_VSC73XX
+	help
+	  This enables support for the Vitesse VSC7385, VSC7388, VSC7395
+	  and VSC7398 SparX integrated ethernet switches, connected over
+	  a CPU-attached address bus and work in memory-mapped I/O mode.
+
+config NET_DSA_YT921X
+	tristate "Motorcomm YT9215 ethernet switch chip support"
+	select NET_DSA_TAG_YT921X
+	select NET_IEEE8021Q_HELPERS if DCB
+	help
+	  This enables support for the Motorcomm YT9215 ethernet switch
+	  chip.
+endmenu