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2021-02-13staging: greybus: Fixed a misspelling in hid.cPritthijit Nath
Fixed the spelling of 'transfered' to 'transferred'. Signed-off-by: Pritthijit Nath <pritthijit.nath@icloud.com> Link: https://lore.kernel.org/r/20210212101324.12391-1-pritthijit.nath@icloud.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-13staging: wimax/i2400m: fix some byte order issues found by sparseAnirudh Rayabharam
Fix sparse byte-order warnings in the i2400m_bm_cmd_prepare() function: wimax/i2400m/fw.c:194:36: warning: restricted __le32 degrades to integer wimax/i2400m/fw.c:195:34: warning: invalid assignment: += wimax/i2400m/fw.c:195:34: left side has type unsigned int wimax/i2400m/fw.c:195:34: right side has type restricted __le32 wimax/i2400m/fw.c:196:32: warning: restricted __le32 degrades to integer wimax/i2400m/fw.c:196:47: warning: restricted __le32 degrades to integer wimax/i2400m/fw.c:196:66: warning: restricted __le32 degrades to integer Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com> Link: https://lore.kernel.org/r/20210212153843.8554-1-mail@anirudhrb.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-13staging: wimax: i2400m: fix some incorrect type warningsAyush
Fix some "incorrect type in assignment" warnings reported by sparse in tx.c sparse warnings: wimax/i2400m/tx.c:788:35: warning: cast to restricted __le16 wimax/i2400m/tx.c:788:33: warning: incorrect type in assignment (different base types) wimax/i2400m/tx.c:788:33: expected restricted __le16 [usertype] num_pls wimax/i2400m/tx.c:788:33: got unsigned short [usertype] wimax/i2400m/tx.c:896:32: warning: cast to restricted __le32 wimax/i2400m/tx.c:896:30: warning: incorrect type in assignment (different base types) wimax/i2400m/tx.c:896:30: expected restricted __le32 [usertype] barker wimax/i2400m/tx.c:896:30: got unsigned int [usertype] wimax/i2400m/tx.c:897:34: warning: cast to restricted __le32 wimax/i2400m/tx.c:897:32: warning: incorrect type in assignment (different base types) wimax/i2400m/tx.c:897:32: expected restricted __le32 [usertype] sequence wimax/i2400m/tx.c:897:32: got unsigned int [usertype] wimax/i2400m/tx.c:899:15: warning: cast to restricted __le32 wimax/i2400m/tx.c:899:15: warning: cast from restricted __le16 Signed-off-by: Ayush <ayush@disroot.org> Link: https://lore.kernel.org/r/20210212213628.801642-1-ayush@disroot.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-13staging: greybus: minor code style fixManikantan Ravichandran
checkpatch warning fix for string split across lines Signed-off-by: Manikantan Ravichandran <ravman1991@gmail.com> Link: https://lore.kernel.org/r/20210212225035.GA16260@whach Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-13staging:wlan-ng: use memdup_user instead of kmalloc/copy_from_userIvan Safonov
memdup_user() is shorter and safer equivalent of kmalloc/copy_from_user pair. Signed-off-by: Ivan Safonov <insafonov@gmail.com> Link: https://lore.kernel.org/r/20210213120527.451531-1-insafonov@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-13staging:r8188eu: use IEEE80211_FCTL_* kernel definitionsIvan Safonov
_TO_DS_, _FROM_DS_, _MORE_FRAG_, _RETRY_, _PWRMGT_, _MORE_DATA_, _PRIVACY_, _ORDER_ definitions are duplicate IEEE80211_FCTL_* kernel definitions. Signed-off-by: Ivan Safonov <insafonov@gmail.com> Link: https://lore.kernel.org/r/20210213131148.458582-1-insafonov@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-13staging: rtl8192e: remove multiple blank linesWilliam Durand
This patch removes some blank lines in order to fix a checkpatch issue. Signed-off-by: William Durand <will+git@drnd.me> Link: https://lore.kernel.org/r/20210213034711.14823-1-will+git@drnd.me Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-13Merge branch 'for-5.11-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup fixes from Tejun Heo: "Two cgroup fixes: - fix a NULL deref when trying to poll PSI in the root cgroup - fix confusing controller parsing corner case when mounting cgroup v1 hierarchies And doc / maintainer file updates" * 'for-5.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: update PSI file description in docs cgroup: fix psi monitor for root cgroup MAINTAINERS: Update my email address MAINTAINERS: Remove stale URLs for cpuset cgroup-v1: add disabled controller check in cgroup1_parse_param()
2021-02-13Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge fixes from Andrew Morton: "6 patches. Subsystems affected by this patch series: mm/pagemap, scripts, MAINTAINERS, and h8300" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: h8300: fix PREEMPTION build, TI_PRE_COUNT undefined MAINTAINERS: add Andrey Konovalov to KASAN reviewers MAINTAINERS: update Andrey Konovalov's email address MAINTAINERS: update KASAN file list scripts/recordmcount.pl: support big endian for ARCH sh m68k: make __pfn_to_phys() and __phys_to_pfn() available for !MMU
2021-02-13Merge branch 'i2c/for-current' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c fix from Wolfram Sang: "One more I2C driver bugfix" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: stm32f7: fix configuration of the digital filter
2021-02-13Merge tag 'for-5.11-rc7-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux Pull btrfs fix from David Sterba: "A regression fix caused by a refactoring in 5.11. A corrupted superblock wouldn't be detected by checksum verification due to wrongly placed initialization of the checksum length, thus making memcmp always work" * tag 'for-5.11-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: btrfs: initialize fs_info::csum_size earlier in open_ctree
2021-02-13h8300: fix PREEMPTION build, TI_PRE_COUNT undefinedRandy Dunlap
Fix a build error for undefined 'TI_PRE_COUNT' by adding it to asm-offsets.c. h8300-linux-ld: arch/h8300/kernel/entry.o: in function `resume_kernel': (.text+0x29a): undefined reference to `TI_PRE_COUNT' Link: https://lkml.kernel.org/r/20210212021650.22740-1-rdunlap@infradead.org Fixes: df2078b8daa7 ("h8300: Low level entry") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kernel test robot <lkp@intel.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-13MAINTAINERS: add Andrey Konovalov to KASAN reviewersAndrey Konovalov
Add my personal email address to KASAN reviewers list. Link: https://lkml.kernel.org/r/c1ce89a7aae0e2d6852249c280b1eb59aeac30c0.1613150186.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-13MAINTAINERS: update Andrey Konovalov's email addressAndrey Konovalov
Use my personal email address. Link: https://lkml.kernel.org/r/b0ec98dabbc12336c162788f5ccde97045a0d65e.1613150186.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-13MAINTAINERS: update KASAN file listAndrey Konovalov
Account for the following files: - lib/Kconfig.kasan - lib/test_kasan_module.c - arch/arm64/include/asm/mte-kasan.h Link: https://lkml.kernel.org/r/7f9771d97b34d396bfdc4e288ad93486bb865a06.1613150186.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-13scripts/recordmcount.pl: support big endian for ARCH shRong Chen
The kernel test robot reported the following issue: CC [M] drivers/soc/litex/litex_soc_ctrl.o sh4-linux-objcopy: Unable to change endianness of input file(s) sh4-linux-ld: cannot find drivers/soc/litex/.tmp_gl_litex_soc_ctrl.o: No such file or directory sh4-linux-objcopy: 'drivers/soc/litex/.tmp_mx_litex_soc_ctrl.o': No such file The problem is that the format of input file is elf32-shbig-linux, but sh4-linux-objcopy wants to output a file which format is elf32-sh-linux: $ sh4-linux-objdump -d drivers/soc/litex/litex_soc_ctrl.o | grep format drivers/soc/litex/litex_soc_ctrl.o: file format elf32-shbig-linux Link: https://lkml.kernel.org/r/20210210150435.2171567-1-rong.a.chen@intel.com Link: https://lore.kernel.org/linux-mm/202101261118.GbbYSlHu-lkp@intel.com Signed-off-by: Rong Chen <rong.a.chen@intel.com> Reported-by: kernel test robot <lkp@intel.com> Cc: Yoshinori Sato <ysato@users.osdn.me> Cc: Rich Felker <dalias@libc.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-13m68k: make __pfn_to_phys() and __phys_to_pfn() available for !MMUMike Rapoport
Recent changes that obsoleted DISCONTIGMEM on m68k switched the MMU variant to use generic definitions of __pfn_to_phys() and __phys_to_pfn(), but missed the !MMU variant which caused a build failure: drivers/media/common/videobuf2/videobuf2-dma-contig.c: In function 'vb2_dc_get_userptr': drivers/media/common/videobuf2/videobuf2-dma-contig.c:509:5: error: implicit declaration of function '__pfn_to_phys' [-Werror=implicit-function-declaration] 509 | __pfn_to_phys(nums[0]), size, buf->dma_dir, 0); | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors Enable __pfn_to_phys() and __phys_to_pfn() on !MMU builds. Link: https://lkml.kernel.org/r/20210211232202.GS299309@linux.ibm.com Fixes: 4bfc848e0981 ("m68k/mm: enable use of generic memory_model.h for !DISCONTIGMEM") Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Reported-by: kernel test robot <lkp@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-02-13io_uring: kill cached requests from exiting task closing the ringJens Axboe
Be nice and prune these upfront, in case the ring is being shared and one of the tasks is going away. This is a bit more important now that we account the allocations. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-02-13io_uring: add helper to free all request cachesJens Axboe
We have three different ones, put it in a helper for easy calling. This is in preparation for doing it outside of ring freeing as well. With that in mind, also ensure that we do the proper locking for safe calling from a context where the ring it still live. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-02-13io_uring: allow task match to be passed to io_req_cache_free()Jens Axboe
No changes in this patch, just allows a caller to pass in a targeted task that we must match for freeing requests in the cache. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-02-13MAINTAINERS: Add git tree for KVM/mipsTiezhu Yang
There is no git tree for KVM/mips in MAINTAINERS, it is not convinent to rebase, add it. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13MIPS: Use common way to parse elfcorehdrJinyang He
"elfcorehdr" can be parsed at kernel/crash_dump.c Signed-off-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13MIPS: Simplify EVA cache handlingThomas Bogendoerfer
protected_cache_op is only used for flushing user addresses, so we only need to define protected_cache_op different in EVA mode and be done with it. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13Revert "MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache ↵Thomas Bogendoerfer
flushes" This reverts commit 6ebda44f366478d1eea180d93154e7d97b591f50. All icache flushes in this code paths are done via flush_icache_range(), which only uses normal cache instruction. And this is the correct thing for EVA mode, too. So no need to do set_fs(KERNEL_DS) here. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Reviewed-by: Christoph Hellwig <hch@lst.de>
2021-02-13MIPS: remove CONFIG_DMA_PERDEV_COHERENTChristoph Hellwig
Just select DMA_NONCOHERENT and ARCH_HAS_SETUP_DMA_OPS from the MIPS_GENERIC platform instead. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Huacai Chen <chenhuacai@kernel.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13MIPS: remove CONFIG_DMA_MAYBE_COHERENTChristoph Hellwig
CONFIG_DMA_MAYBE_COHERENT just guards two early init options now. Just enable them unconditionally for CONFIG_DMA_NONCOHERENT. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13driver core: lift dma_default_coherent into common codeChristoph Hellwig
Lift the dma_default_coherent variable from the mips architecture code to the driver core. This allows an architecture to sdefault all device to be DMA coherent at run time, even if the kernel is build with support for DMA noncoherent device. By allowing device_initialize to set the ->dma_coherent field to this default the amount of arch hooks required for this behavior can be greatly reduced. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13MIPS: refactor the runtime coherent vs noncoherent DMA indicatorsChristoph Hellwig
Replace the global coherentio enum, and the hw_coherentio (fake) boolean variables with a single boolean dma_default_coherent flag. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13MIPS/alchemy: factor out the DMA coherent setupChristoph Hellwig
Factor out a alchemy_dma_coherent helper that determines if the platform is DMA coherent. Also stop initializing the hw_coherentio variable, given that is only ever set to a non-zero value by the malta setup code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13MIPS/malta: simplify plat_setup_iocoherencyChristoph Hellwig
Given that plat_mem_setup runs before earlyparams are handled and malta selects CONFIG_DMA_MAYBE_COHERENT, coherentio can only be set to IO_COHERENCE_DEFAULT at this point. So remove the checking for other options and merge plat_enable_iocoherency into plat_setup_iocoherency to simplify the code a bit. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-13MIPS: Add basic support for ptrace single stepTiezhu Yang
In the current code, arch_has_single_step() is not defined on MIPS, that means MIPS does not support instruction single-step for user mode. Delve is a debugger for the Go programming language, the ptrace syscall PtraceSingleStep() failed [1] on MIPS and then the single step function can not work well, we can see that PtraceSingleStep() definition returns ptrace(PTRACE_SINGLESTEP) [2]. So it is necessary to support ptrace single step on MIPS. At the beginning, we try to use the Debug Single Step exception on the Loongson 3A4000 platform, but it has no effect when set CP0_DEBUG SSt bit, this is because CP0_DEBUG NoSSt bit is 1 which indicates no single-step feature available [3], so this way which is dependent on the hardware is almost impossible. With further research, we find out there exists a common way used with break instruction in arch/alpha/kernel/ptrace.c, it is workable. For the above analysis, define arch_has_single_step(), add the common function user_enable_single_step() and user_disable_single_step(), set flag TIF_SINGLESTEP for child process, use break instruction to set breakpoint. We can use the following testcase to test it: tools/testing/selftests/breakpoints/step_after_suspend_test.c $ make -C tools/testing/selftests TARGETS=breakpoints $ cd tools/testing/selftests/breakpoints Without this patch: $ ./step_after_suspend_test -n TAP version 13 1..4 # ptrace(PTRACE_SINGLESTEP) not supported on this architecture: Input/output error ok 1 # SKIP CPU 0 # ptrace(PTRACE_SINGLESTEP) not supported on this architecture: Input/output error ok 2 # SKIP CPU 1 # ptrace(PTRACE_SINGLESTEP) not supported on this architecture: Input/output error ok 3 # SKIP CPU 2 # ptrace(PTRACE_SINGLESTEP) not supported on this architecture: Input/output error ok 4 # SKIP CPU 3 # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:4 error:0 With this patch: $ ./step_after_suspend_test -n TAP version 13 1..4 ok 1 CPU 0 ok 2 CPU 1 ok 3 CPU 2 ok 4 CPU 3 # Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0 [1] https://github.com/go-delve/delve/blob/master/pkg/proc/native/threads_linux.go#L50 [2] https://github.com/go-delve/delve/blob/master/vendor/golang.org/x/sys/unix/syscall_linux.go#L1573 [3] http://www.t-es-t.hu/download/mips/md00047f.pdf Reported-by: Guoqi Chen <chenguoqi@loongson.cn> Signed-off-by: Xingxing Su <suxingxing@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-02-12Merge branch 'Xilinx-axienet-updates'David S. Miller
Robert Hancock says: ==================== Xilinx axienet updates Updates to the Xilinx AXI Ethernet driver to add support for an additional ethtool operation, and to support dynamic switching between 1000BaseX and SGMII interface modes. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12net: axienet: Support dynamic switching between 1000BaseX and SGMIIRobert Hancock
Newer versions of the Xilinx AXI Ethernet core (specifically version 7.2 or later) allow the core to be configured with a PHY interface mode of "Both", allowing either 1000BaseX or SGMII modes to be selected at runtime. Add support for this in the driver to allow better support for applications which can use both fiber and copper SFP modules. Signed-off-by: Robert Hancock <robert.hancock@calian.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12dt-bindings: net: xilinx_axienet: add xlnx,switch-x-sgmii attributeRobert Hancock
Document the new xlnx,switch-x-sgmii attribute which is used to indicate that the Ethernet core supports dynamic switching between 1000BaseX and SGMII. Signed-off-by: Robert Hancock <robert.hancock@calian.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12net: axienet: hook up nway_reset ethtool operationRobert Hancock
Hook up the nway_reset ethtool operation to the corresponding phylink function so that "ethtool -r" can be supported. Signed-off-by: Robert Hancock <robert.hancock@calian.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12Merge branch 'Add support of pointer to struct in global'Alexei Starovoitov
Dmitrii Banshchikov says: ==================== This patchset adds support of pointers to type with known size among global function arguments. The motivation is to overcome the limit on the maximum number of allowed arguments and avoid tricky and unoptimal ways of passing arguments. A referenced type may contain pointers but access via such pointers cannot be veirified currently. v2 -> v3 - Fix reg ID generation - Fix commit description - Fix typo - Fix tests v1 -> v2: - Allow pointer to any type with known size rather than struct only - Allow pointer in global functions only - Add more tests - Fix wrapping and v1 comments ==================== Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2021-02-12selftests/bpf: Add unit tests for pointers in global functionsDmitrii Banshchikov
test_global_func9 - check valid pointer's scenarios test_global_func10 - check that a smaller type cannot be passed as a larger one test_global_func11 - check that CTX pointer cannot be passed test_global_func12 - check access to a null pointer test_global_func13 - check access to an arbitrary pointer value test_global_func14 - check that an opaque pointer cannot be passed test_global_func15 - check that a variable has an unknown value after it was passed to a global function by pointer test_global_func16 - check access to uninitialized stack memory test_global_func_args - check read and write operations through a pointer Signed-off-by: Dmitrii Banshchikov <me@ubique.spb.ru> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210212205642.620788-5-me@ubique.spb.ru
2021-02-12bpf: Support pointers in global func argsDmitrii Banshchikov
Add an ability to pass a pointer to a type with known size in arguments of a global function. Such pointers may be used to overcome the limit on the maximum number of arguments, avoid expensive and tricky workarounds and to have multiple output arguments. A referenced type may contain pointers but indirect access through them isn't supported. The implementation consists of two parts. If a global function has an argument that is a pointer to a type with known size then: 1) In btf_check_func_arg_match(): check that the corresponding register points to NULL or to a valid memory region that is large enough to contain the expected argument's type. 2) In btf_prepare_func_args(): set the corresponding register type to PTR_TO_MEM_OR_NULL and its size to the size of the expected type. Only global functions are supported because allowance of pointers for static functions might break validation. Consider the following scenario. A static function has a pointer argument. A caller passes pointer to its stack memory. Because the callee can change referenced memory verifier cannot longer assume any particular slot type of the caller's stack memory hence the slot type is changed to SLOT_MISC. If there is an operation that relies on slot type other than SLOT_MISC then verifier won't be able to infer safety of the operation. When verifier sees a static function that has a pointer argument different from PTR_TO_CTX then it skips arguments check and continues with "inline" validation with more information available. The operation that relies on the particular slot type now succeeds. Because global functions were not allowed to have pointer arguments different from PTR_TO_CTX it's not possible to break existing and valid code. Signed-off-by: Dmitrii Banshchikov <me@ubique.spb.ru> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210212205642.620788-4-me@ubique.spb.ru
2021-02-12bpf: Extract nullable reg type conversion into a helper functionDmitrii Banshchikov
Extract conversion from a register's nullable type to a type with a value. The helper will be used in mark_ptr_not_null_reg(). Signed-off-by: Dmitrii Banshchikov <me@ubique.spb.ru> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210212205642.620788-3-me@ubique.spb.ru
2021-02-12bpf: Rename bpf_reg_state variablesDmitrii Banshchikov
Using "reg" for an array of bpf_reg_state and "reg[i + 1]" for an individual bpf_reg_state is error-prone and verbose. Use "regs" for the former and "reg" for the latter as other code nearby does. Signed-off-by: Dmitrii Banshchikov <me@ubique.spb.ru> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210212205642.620788-2-me@ubique.spb.ru
2021-02-12net: axienet: Handle deferred probe on clock properlyRobert Hancock
This driver is set up to use a clock mapping in the device tree if it is present, but still work without one for backward compatibility. However, if getting the clock returns -EPROBE_DEFER, then we need to abort and return that error from our driver initialization so that the probe can be retried later after the clock is set up. Move clock initialization to earlier in the process so we do not waste as much effort if the clock is not yet available. Switch to use devm_clk_get_optional and abort initialization on any error reported. Also enable the clock regardless of whether the controller is using an MDIO bus, as the clock is required in any case. Fixes: 09a0354cadec267be7f ("net: axienet: Use clock framework to get device clock rate") Signed-off-by: Robert Hancock <robert.hancock@calian.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12Merge branch 'tcp-mem-pressure-vs-SO_RCVLOWAT'David S. Miller
Eric Dumazet says: ==================== tcp: mem pressure vs SO_RCVLOWAT First patch fixes an issue for applications using SO_RCVLOWAT to reduce context switches. Second patch is a cleanup. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12tcp: factorize logic into tcp_epollin_ready()Eric Dumazet
Both tcp_data_ready() and tcp_stream_is_readable() share the same logic. Add tcp_epollin_ready() helper to avoid duplication. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Arjun Roy <arjunroy@google.com> Cc: Wei Wang <weiwan@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12tcp: fix SO_RCVLOWAT related hangs under mem pressureEric Dumazet
While commit 24adbc1676af ("tcp: fix SO_RCVLOWAT hangs with fat skbs") fixed an issue vs too small sk_rcvbuf for given sk_rcvlowat constraint, it missed to address issue caused by memory pressure. 1) If we are under memory pressure and socket receive queue is empty. First incoming packet is allowed to be queued, after commit 76dfa6082032 ("tcp: allow one skb to be received per socket under memory pressure") But we do not send EPOLLIN yet, in case tcp_data_ready() sees sk_rcvlowat is bigger than skb length. 2) Then, when next packet comes, it is dropped, and we directly call sk->sk_data_ready(). 3) If application is using poll(), tcp_poll() will then use tcp_stream_is_readable() and decide the socket receive queue is not yet filled, so nothing will happen. Even when sender retransmits packets, phases 2) & 3) repeat and flow is effectively frozen, until memory pressure is off. Fix is to consider tcp_under_memory_pressure() to take care of global memory pressure or memcg pressure. Fixes: 24adbc1676af ("tcp: fix SO_RCVLOWAT hangs with fat skbs") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Arjun Roy <arjunroy@google.com> Suggested-by: Wei Wang <weiwan@google.com> Reviewed-by: Wei Wang <weiwan@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12Merge branch '40GbE' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue Tony Nguyen says: ==================== 40GbE Intel Wired LAN Driver Updates 2021-02-12 This series contains updates to i40e, ice, and ixgbe drivers. Maciej does cleanups on the following drivers. For i40e, removes redundant check for XDP prog, cleans up no longer relevant information, and removes an unused function argument. For ice, removes local variable use, instead returning values directly. Moves skb pointer from buffer to ring and removes an unneeded check for xdp_prog in zero copy path. Also removes a redundant MTU check when changing it. For i40e, ice, and ixgbe, stores the rx_offset in the Rx ring as the value is constant so there's no need for continual calls. Bjorn folds a decrement into a while statement. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12ibmvnic: change IBMVNIC_MAX_IND_DESCS to 16Dany Madden
The supported indirect subcrq entries on Power8 is 16. Power9 supports 128. Redefined this value to 16 to minimize the driver from having to reset when migrating between Power9 and Power8. In our rx/tx performance testing, we found no performance difference between 16 and 128 at this time. Fixes: f019fb6392e5 ("ibmvnic: Introduce indirect subordinate Command Response Queue buffer") Signed-off-by: Dany Madden <drt@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12Merge branch 'tc-mpls-selftests'David S. Miller
Guillaume Nault says: ==================== selftests: tc: Test tc-flower's MPLS features A couple of patches for exercising the MPLS filters of tc-flower. Patch 1 tests basic MPLS matching features: those that only work on the first label stack entry (that is, the mpls_label, mpls_tc, mpls_bos and mpls_ttl options). Patch 2 tests the more generic "mpls" and "lse" options, which allow matching MPLS fields beyond the first stack entry. In both patches, special care is taken to skip these new tests for incompatible versions of tc. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12selftests: tc: Add generic mpls matching support for tc-flowerGuillaume Nault
Add tests in tc_flower.sh for generic matching on MPLS Label Stack Entries. The label, tc, bos and ttl fields are tested for the first and second labels. For each field, the minimal and maximal values are tested (the former at depth 1 and the later at depth 2). There are also tests for matching the presence of a label stack entry at a given depth. In order to reduce the amount of code, all "lse" subcommands are tested in match_mpls_lse_test(). Action "continue" is used, so that test packets are evaluated by all filters. Then, we can verify if each filter matched the expected number of packets. Some versions of tc-flower produced invalid json output when dumping MPLS filters with depth > 1. Skip the test if tc isn't recent enough. Signed-off-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12selftests: tc: Add basic mpls_* matching support for tc-flowerGuillaume Nault
Add tests in tc_flower.sh for mpls_label, mpls_tc, mpls_bos and mpls_ttl. For each keyword, test the minimal and maximal values. Selectively skip these new mpls tests for tc versions that don't support them. Signed-off-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-12Merge branch 'brport-flags'David S. Miller
Vladimir Oltean says: ==================== Cleanup in brport flags switchdev offload for DSA The initial goal of this series was to have better support for standalone ports mode on the DSA drivers like ocelot/felix and sja1105. This turned out to require some API adjustments in both directions: to the information presented to and by the switchdev notifier, and to the API presented to the switch drivers by the DSA layer. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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