linux/Documentation, branch v5.7

checkpatch/coding-style: deprecate 80-column warning

2020-05-31T18:00:42Z

Yes, staying withing 80 columns is certainly still _preferred_. But it's not the hard limit that the checkpatch warnings imply, and other concerns can most certainly dominate. Increase the default limit to 100 characters. Not because 100 characters is some hard limit either, but that's certainly a "what are you doing" kind of value and less likely to be about the occasional slightly longer lines. Miscellanea: - to avoid unnecessary whitespace changes in files, checkpatch will no longer emit a warning about line length when scanning files unless --strict is also used - Add a bit to coding-style about alignment to open parenthesis Signed-off-by: Joe Perches Signed-off-by: Linus Torvalds

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2020-05-24T00:16:18Z

Pull networking fixes from David Miller: 1) Fix RCU warnings in ipv6 multicast router code, from Madhuparna Bhowmik. 2) Nexthop attributes aren't being checked properly because of mis-initialized iterator, from David Ahern. 3) Revert iop_idents_reserve() change as it caused performance regressions and was just working around what is really a UBSAN bug in the compiler. From Yuqi Jin. 4) Read MAC address properly from ROM in bmac driver (double iteration proceeds past end of address array), from Jeremy Kerr. 5) Add Microsoft Surface device IDs to r8152, from Marc Payne. 6) Prevent reference to freed SKB in __netif_receive_skb_core(), from Boris Sukholitko. 7) Fix ACK discard behavior in rxrpc, from David Howells. 8) Preserve flow hash across packet scrubbing in wireguard, from Jason A. Donenfeld. 9) Cap option length properly for SO_BINDTODEVICE in AX25, from Eric Dumazet. 10) Fix encryption error checking in kTLS code, from Vadim Fedorenko. 11) Missing BPF prog ref release in flow dissector, from Jakub Sitnicki. 12) dst_cache must be used with BH disabled in tipc, from Eric Dumazet. 13) Fix use after free in mlxsw driver, from Jiri Pirko. 14) Order kTLS key destruction properly in mlx5 driver, from Tariq Toukan. 15) Check devm_platform_ioremap_resource() return value properly in several drivers, from Tiezhu Yang. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (71 commits) net: smsc911x: Fix runtime PM imbalance on error net/mlx4_core: fix a memory leak bug. net: ethernet: ti: cpsw: fix ASSERT_RTNL() warning during suspend net: phy: mscc: fix initialization of the MACsec protocol mode net: stmmac: don't attach interface until resume finishes net: Fix return value about devm_platform_ioremap_resource() net/mlx5: Fix error flow in case of function_setup failure net/mlx5e: CT: Correctly get flow rule net/mlx5e: Update netdev txq on completions during closure net/mlx5: Annotate mutex destroy for root ns net/mlx5: Don't maintain a case of del_sw_func being null net/mlx5: Fix cleaning unmanaged flow tables net/mlx5: Fix memory leak in mlx5_events_init net/mlx5e: Fix inner tirs handling net/mlx5e: kTLS, Destroy key object after destroying the TIS net/mlx5e: Fix allowed tc redirect merged eswitch offload cases net/mlx5: Avoid processing commands before cmdif is ready net/mlx5: Fix a race when moving command interface to events mode net/mlx5: Add command entry handling completion rxrpc: Fix a memory leak in rxkad_verify_response() ...

dt-bindings: net: dsa: b53: Add missing size and address cells to example

2020-05-17T19:31:56Z

Add the missing size and address cells to the b53 example. Otherwise, it may not compile or issue warnings if directly copied into a device tree. Signed-off-by: Kurt Kanzenbach Acked-by: Florian Fainelli Signed-off-by: David S. Miller

Merge tag 'usb-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

2020-05-17T19:31:22Z

Pull USB fixes from Greg KH: "Here are a number of USB fixes for 5.7-rc6 The "largest" in here is a bunch of raw-gadget fixes and api changes as the driver just showed up in -rc1 and work has been done to fix up some uapi issues found with the original submission, before it shows up in a -final release. Other than that, a bunch of other small USB gadget fixes, xhci fixes, some quirks, andother tiny fixes for reported issues. All of these have been in linux-next with no reported issues" * tag 'usb-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (26 commits) USB: gadget: fix illegal array access in binding with UDC usb: core: hub: limit HUB_QUIRK_DISABLE_AUTOSUSPEND to USB5534B USB: usbfs: fix mmap dma mismatch usb: host: xhci-plat: keep runtime active when removing host usb: xhci: Fix NULL pointer dereference when enqueuing trbs from urb sg list usb: cdns3: gadget: make a bunch of functions static usb: mtu3: constify struct debugfs_reg32 usb: gadget: udc: atmel: Make some symbols static usb: raw-gadget: fix null-ptr-deref when reenabling endpoints usb: raw-gadget: documentation updates usb: raw-gadget: support stalling/halting/wedging endpoints usb: raw-gadget: fix gadget endpoint selection usb: raw-gadget: improve uapi headers comments usb: typec: mux: intel: Fix DP_HPD_LVL bit field usb: raw-gadget: fix return value of ep read ioctls usb: dwc3: select USB_ROLE_SWITCH usb: gadget: legacy: fix error return code in gncm_bind() usb: gadget: legacy: fix error return code in cdc_bind() usb: gadget: legacy: fix redundant initialization warnings usb: gadget: tegra-xudc: Fix idle suspend/resume ...

Merge tag 'arm-soc-fixes-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2020-05-16T20:27:58Z

Pull ARM SoC/dt fixes from Arnd Bergmann: "This round of fixes is almost exclusively device tree changes, with trivial defconfig fixes and one compiler warning fix added in. A number of patches are to fix dtc warnings, in particular on Amlogic, i.MX and Rockchips. Other notable changes include: Renesas: - Fix a wrong clock configuration on R-Mobile A1 - Fix IOMMU support on R-Car V3H Allwinner - Multiple audio fixes Qualcomm - Use a safe CPU voltage on MSM8996 - Fixes to match a late audio driver change Rockchip: - Some fixes for the newly added Pinebook Pro NXP i.MX: - Fix I2C1 pinctrl configuration for i.MX27 phytec-phycard board - Fix imx6dl-yapp4-ursa board Ethernet connection OMAP: - A regression fix for non-existing can device on am534x-idk - Fix flakey wlan on droid4 where some devices would not connect at all because of internal pull being used with an external pull - Fix occasional missed wake-up events on droid4 modem uart" * tag 'arm-soc-fixes-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (51 commits) ARM: dts: iwg20d-q7-dbcm-ca: Remove unneeded properties in hdmi@39 ARM: dts: renesas: Make hdmi encoder nodes compliant with DT bindings arm64: dts: renesas: Make hdmi encoder nodes compliant with DT bindings arm64: defconfig: add MEDIA_PLATFORM_SUPPORT arm64: defconfig: ARCH_R8A7795: follow changed config symbol name arm64: defconfig: add DRM_DISPLAY_CONNECTOR arm64: defconfig: DRM_DUMB_VGA_DAC: follow changed config symbol name ARM: oxnas: make ox820_boot_secondary static ARM: dts: r8a7740: Add missing extal2 to CPG node ARM: dts: omap4-droid4: Fix occasional lost wakeirq for uart1 ARM: dts: omap4-droid4: Fix flakey wlan by disabling internal pull for gpio arm64: dts: allwinner: a64: Remove unused SPDIF sound card arm64: dts: allwinner: a64: pinetab: Fix cpvdd supply name arm64: dts: meson-g12: remove spurious blank line arm64: dts: meson-g12b-khadas-vim3: add missing frddr_a status property arm64: dts: meson-g12-common: fix dwc2 clock names arm64: dts: meson-g12b-ugoos-am6: fix usb vbus-supply arm64: dts: freescale: imx8mp: update input_val for AUDIOMIX_BIT_STREAM ARM: dts: r7s9210: Remove bogus clock-names from OSTM nodes ARM: dts: rockchip: fix pinctrl sub nodename for spi in rk322x.dtsi ...

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2020-05-15T20:10:06Z

Pull networking fixes from David Miller: 1) Fix sk_psock reference count leak on receive, from Xiyu Yang. 2) CONFIG_HNS should be invisible, from Geert Uytterhoeven. 3) Don't allow locking route MTUs in ipv6, RFCs actually forbid this, from Maciej Żenczykowski. 4) ipv4 route redirect backoff wasn't actually enforced, from Paolo Abeni. 5) Fix netprio cgroup v2 leak, from Zefan Li. 6) Fix infinite loop on rmmod in conntrack, from Florian Westphal. 7) Fix tcp SO_RCVLOWAT hangs, from Eric Dumazet. 8) Various bpf probe handling fixes, from Daniel Borkmann. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits) selftests: mptcp: pm: rm the right tmp file dpaa2-eth: properly handle buffer size restrictions bpf: Restrict bpf_trace_printk()'s %s usage and add %pks, %pus specifier bpf: Add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range bpf: Restrict bpf_probe_read{, str}() only to archs where they work MAINTAINERS: Mark networking drivers as Maintained. ipmr: Add lockdep expression to ipmr_for_each_table macro ipmr: Fix RCU list debugging warning drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810 tcp: fix error recovery in tcp_zerocopy_receive() MAINTAINERS: Add Jakub to networking drivers. MAINTAINERS: another add of Karsten Graul for S390 networking drivers: ipa: fix typos for ipa_smp2p structure doc pppoe: only process PADT targeted at local interfaces selftests/bpf: Enforce returning 0 for fentry/fexit programs bpf: Enforce returning 0 for fentry/fexit progs net: stmmac: fix num_por initialization security: Fix the default value of secid_to_secctx hook libbpf: Fix register naming in PT_REGS s390 macros ...

bpf: Restrict bpf_trace_printk()'s %s usage and add %pks, %pus specifier

2020-05-15T15:10:36Z

Usage of plain %s conversion specifier in bpf_trace_printk() suffers from the very same issue as bpf_probe_read{,str}() helpers, that is, it is broken on archs with overlapping address ranges. While the helpers have been addressed through work in 6ae08ae3dea2 ("bpf: Add probe_read_{user, kernel} and probe_read_{user, kernel}_str helpers"), we need an option for bpf_trace_printk() as well to fix it. Similarly as with the helpers, force users to make an explicit choice by adding %pks and %pus specifier to bpf_trace_printk() which will then pick the corresponding strncpy_from_unsafe*() variant to perform the access under KERNEL_DS or USER_DS. The %pk* (kernel specifier) and %pu* (user specifier) can later also be extended for other objects aside strings that are probed and printed under tracing, and reused out of other facilities like bpf_seq_printf() or BTF based type printing. Existing behavior of %s for current users is still kept working for archs where it is not broken and therefore gated through CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE. For archs not having this property we fall-back to pick probing under KERNEL_DS as a sensible default. Fixes: 8d3b7dce8622 ("bpf: add support for %s specifier to bpf_trace_printk()") Reported-by: Linus Torvalds Reported-by: Christoph Hellwig Signed-off-by: Daniel Borkmann Signed-off-by: Alexei Starovoitov Cc: Masami Hiramatsu Cc: Brendan Gregg Link: https://lore.kernel.org/bpf/20200515101118.6508-4-daniel@iogearbox.net

usb: raw-gadget: documentation updates

2020-05-14T09:30:18Z

Mention the issue with fixed UDC addresses. Links external examples and test suite. Add more implmenetation details and potential improvements. Signed-off-by: Andrey Konovalov Signed-off-by: Felipe Balbi

usb: raw-gadget: support stalling/halting/wedging endpoints

2020-05-14T09:30:18Z

Raw Gadget is currently unable to stall/halt/wedge gadget endpoints, which is required for proper emulation of certain USB classes. This patch adds a few more ioctls: - USB_RAW_IOCTL_EP0_STALL allows to stall control endpoint #0 when there's a pending setup request for it. - USB_RAW_IOCTL_SET/CLEAR_HALT/WEDGE allow to set/clear halt/wedge status on non-control non-isochronous endpoints. Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface") Signed-off-by: Andrey Konovalov Signed-off-by: Felipe Balbi

usb: raw-gadget: fix gadget endpoint selection

2020-05-14T09:30:17Z

Currently automatic gadget endpoint selection based on required features doesn't work. Raw Gadget tries iterating over the list of available endpoints and finding one that has the right direction and transfer type. Unfortunately selecting arbitrary gadget endpoints (even if they satisfy feature requirements) doesn't work, as (depending on the UDC driver) they might have fixed addresses, and one also needs to provide matching endpoint addresses in the descriptors sent to the host. The composite framework deals with this by assigning endpoint addresses in usb_ep_autoconfig() before enumeration starts. This approach won't work with Raw Gadget as the endpoints are supposed to be enabled after a set_configuration/set_interface request from the host, so it's too late to patch the endpoint descriptors that had already been sent to the host. For Raw Gadget we take another approach. Similarly to GadgetFS, we allow the user to make the decision as to which gadget endpoints to use. This patch adds another Raw Gadget ioctl USB_RAW_IOCTL_EPS_INFO that exposes information about all non-control endpoints that a currently connected UDC has. This information includes endpoints addresses, as well as their capabilities and limits to allow the user to choose the most fitting gadget endpoint. The USB_RAW_IOCTL_EP_ENABLE ioctl is updated to use the proper endpoint validation routine usb_gadget_ep_match_desc(). These changes affect the portability of the gadgets that use Raw Gadget when running on different UDCs. Nevertheless, as long as the user relies on the information provided by USB_RAW_IOCTL_EPS_INFO to dynamically choose endpoint addresses, UDC-agnostic gadgets can still be written with Raw Gadget. Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface") Signed-off-by: Andrey Konovalov Signed-off-by: Felipe Balbi