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2020-09-21bpf: Use a table to drive helper arg type checksLorenz Bauer
The mapping between bpf_arg_type and bpf_reg_type is encoded in a big hairy if statement that is hard to follow. The debug output also leaves to be desired: if a reg_type doesn't match we only print one of the options, instead printing all the valid ones. Convert the if statement into a table which is then used to drive type checking. If none of the reg_types match we print all options, e.g.: R2 type=rdonly_buf expected=fp, pkt, pkt_meta, map_value Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-12-lmb@cloudflare.com
2020-09-21bpf: Hoist type checking for nullable arg typesLorenz Bauer
check_func_arg has a plethora of weird if statements with empty branches. They work around the fact that *_OR_NULL argument types should accept a SCALAR_VALUE register, as long as it's value is 0. These statements make it difficult to reason about the type checking logic. Instead, skip more detailed type checking logic iff the register is 0, and the function expects a nullable type. This allows simplifying the type checking itself. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-11-lmb@cloudflare.com
2020-09-21bpf: Check ARG_PTR_TO_SPINLOCK register type in check_func_argLorenz Bauer
Move the check for PTR_TO_MAP_VALUE to check_func_arg, where all other checking is done as well. Move the invocation of process_spin_lock away from the register type checking, to allow a future refactoring. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-10-lmb@cloudflare.com
2020-09-21bpf: Set meta->raw_mode for pointers close to useLorenz Bauer
If we encounter a pointer to memory, we set meta->raw_mode depending on the type of memory we point at. What isn't obvious is that this information is only used when the next memory size argument is encountered. Move the assignment closer to where it's used, and add a comment that explains what is going on. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-9-lmb@cloudflare.com
2020-09-21bpf: Make context access check genericLorenz Bauer
Always check context access if the register we're operating on is PTR_TO_CTX, rather than relying on ARG_PTR_TO_CTX. This allows simplifying the arg_type checking section of the function. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-8-lmb@cloudflare.com
2020-09-21bpf: Make reference tracking genericLorenz Bauer
Instead of dealing with reg->ref_obj_id individually for every arg type that needs it, rely on the fact that ref_obj_id is zero if the register is not reference tracked. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-7-lmb@cloudflare.com
2020-09-21bpf: Make BTF pointer type checking genericLorenz Bauer
Perform BTF type checks if the register we're working on contains a BTF pointer, rather than if the argument is for a BTF pointer. This is easier to understand, and allows removing the code from the arg_type checking section of the function. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-6-lmb@cloudflare.com
2020-09-21bpf: Allow specifying a BTF ID per argument in function protosLorenz Bauer
Function prototypes using ARG_PTR_TO_BTF_ID currently use two ways to signal which BTF IDs are acceptable. First, bpf_func_proto.btf_id is an array of IDs, one for each argument. This array is only accessed up to the highest numbered argument that uses ARG_PTR_TO_BTF_ID and may therefore be less than five arguments long. It usually points at a BTF_ID_LIST. Second, check_btf_id is a function pointer that is called by the verifier if present. It gets the actual BTF ID of the register, and the argument number we're currently checking. It turns out that the only user check_arg_btf_id ignores the argument, and is simply used to check whether the BTF ID has a struct sock_common at it's start. Replace both of these mechanisms with an explicit BTF ID for each argument in a function proto. Thanks to btf_struct_ids_match this is very flexible: check_arg_btf_id can be replaced by requiring struct sock_common. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-5-lmb@cloudflare.com
2020-09-21btf: Add BTF_ID_LIST_SINGLE macroLorenz Bauer
Add a convenience macro that allows defining a BTF ID list with a single item. This lets us cut down on repetitive macros. Suggested-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-4-lmb@cloudflare.com
2020-09-21bpf: Check scalar or invalid register in check_helper_mem_accessLorenz Bauer
Move the check for a NULL or zero register to check_helper_mem_access. This makes check_stack_boundary easier to understand. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-3-lmb@cloudflare.com
2020-09-21btf: Make btf_set_contains take a const pointerLorenz Bauer
bsearch doesn't modify the contents of the array, so we can take a const pointer. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200921121227.255763-2-lmb@cloudflare.com
2020-09-21Merge tag 'linux-can-next-for-5.10-20200921' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next Marc Kleine-Budde says: ==================== pull-request: can-next 2020-09-21 this is a pull request of 38 patches for net-next. the first 5 patches are by Colin Ian King, Alexandre Belloni and me and they fix various spelling mistakes. The next patch is by me and fixes the indention in the CAN raw protocol according to the kernel coding style. Diego Elio Pettenò contributes two patches to fix dead links in CAN's Kconfig. Masahiro Yamada's patch removes the "WITH Linux-syscall-note" from SPDX tag of C files. AThe next 4 patches are by me and target the CAN device infrastructure and add error propagation and improve the output of various messages to ease driver development and debugging. YueHaibing's patch for the c_can driver removes an unused inline function. Next follows another patch by Colin Ian King, which removes the unneeded initialization of a variable in the mcba_usb driver. A patch by me annotates a fallthrough in the mscan driver. The ti_hecc driver is converted to use devm_platform_ioremap_resource_byname() in a patch by Dejin Zheng. Liu Shixin's patch converts the pcan_usb_pro driver to make use of le32_add_cpu() instead of open coding it. Wang Hai's patch for the peak_pciefd_main driver removes an unused makro. Vaibhav Gupta's patch converts the pch_can driver to generic power management. Stephane Grosjean improves the pcan_usb usb driver by first documenting the commands sent to the device and by adding support of rxerr/txerr counters. The next patch is by me and cleans up the Kconfig of the CAN SPI drivers. The next 6 patches all target the mcp251x driver, they are by Timo Schlüßler, Andy Shevchenko, Tim Harvey and me. They update the DT bindings documentation, sort the include files alphabetically, add GPIO support, make use of the readx_poll_timeout() helper, and add support for half duplex SPI-controllers. Wolfram Sang contributes a patch to update the contact email address in the mscan driver, while Zhang Changzhong updates the clock handling. The next patch is by and updates the rx-offload infrastructure to support callback less usage. The last 6 patches add support for the mcp25xxfd CAN SPI driver. First the dt-bindings are added by Oleksij Rempel, the regmap infrastructure and the main driver is contributed by me. Kurt Van Dijck adds listen-only support, Manivannan Sadhasivam adds himself as maintainer, and Thomas Kopp himself as a reviewer. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21Merge tag 'mac80211-next-for-net-next-2020-09-21' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Johannes Berg says: ==================== This time we have: * some AP-side infrastructure for FILS discovery and unsolicited probe resonses * a major rework of the encapsulation/header conversion offload from Felix, to fit better with e.g. AP_VLAN interfaces * performance fix for VHT A-MPDU size, don't limit to HT * some initial patches for S1G (sub 1 GHz) support, more will come in this area * minor cleanups ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21Merge tag 'mac80211-for-net-2020-09-21' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg says: ==================== Just a few fixes: * fix using HE on 2.4 GHz * AQL (airtime queue limit) estimation & VHT160 fix * do not oversize A-MPDUs if local capability is smaller than peer's * fix radiotap on 6 GHz to not put 2.4 GHz flag * fix Kconfig for lib80211 * little fixlet for 6 GHz channel number / frequency conversion ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: natsemi: Remove set but not used variableZheng Yongjun
Fixes gcc '-Wunused-but-set-variable' warning: drivers/net/ethernet/natsemi/ns83820.c: In function ns83820_get_link_ksettings: drivers/net/ethernet/natsemi/ns83820.c:1210:11: warning: variable ‘tanar’ set but not used [-Wunused-but-set-variable] `tanar` is never used, so remove it. Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21ipv6: route: convert comma to semicolonXu Wang
Replace a comma between expression statements by a semicolon. Signed-off-by: Xu Wang <vulab@iscas.ac.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: unix: remove redundant assignment to variable 'err'Jing Xiangfeng
After commit 37ab4fa7844a ("net: unix: allow bind to fail on mutex lock"), the assignment to err is redundant. So remove it. Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: phy: realtek: enable ALDPS to save power for RTL8211FJisheng Zhang
Enable ALDPS(Advanced Link Down Power Saving) to save power when link down. Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: dsa: rtl8366rb: Support all 4096 VLANsLinus Walleij
There is an off-by-one error in rtl8366rb_is_vlan_valid() making VLANs 0..4094 valid while it should be 1..4095. Fix it. Fixes: d8652956cf37 ("net: dsa: realtek-smi: Add Realtek SMI driver") Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: dsa: mt7530: Add some return-value checksAlex Dewar
In mt7531_cpu_port_config(), if the variable port is neither 5 nor 6, then variable interface will be used uninitialised. Change the function to return -EINVAL in this case. As the return value of mt7531_cpu_port_config() is never checked (even though it returns an int) add a check in the correct place so that the error can be passed up the call stack. Now that we correctly handle errors thrown in this function, also check the return value of mt7531_mac_config() in case an error occurs here. Also add misisng checks to mt7530_setup() and mt7531_setup(), which are another level further up the call stack. Fixes: c288575f7810 ("net: dsa: mt7530: Add the support of MT7531 switch") Addresses-Coverity: 1496993 ("Uninitialized variables") Signed-off-by: Alex Dewar <alex.dewar90@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net-sysfs: add backlog len and CPU id to softnet dataPaolo Abeni
Currently the backlog status in not exposed to user-space. Since long backlogs (or simply not empty ones) can be a source of noticeable latency, -RT deployments need some way to inspect it. Additionally, there isn't a direct match between 'softnet_stat' lines and the related CPU - sd for offline CPUs are not dumped - so this patch also includes the CPU id into such entry. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21sfc: Fix error code in probeDan Carpenter
This failure path should return a negative error code but it currently returns success. Fixes: 51b35a454efd ("sfc: skeleton EF100 PF driver") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21Merge branch 'Update-license-and-polish-ENA-driver-code'David S. Miller
Shay Agroskin says: ==================== Update license and polish ENA driver code This series adds the following: - Change driver's license into SPDX format - Capitalize all log prints in ENA driver - Fix issues raised by static checkers - Improve code readability by adding functions, fix spelling mistakes etc. - Update driver's documentation Changed from previous version: v1->v2: dropped patch that transforms pr_* log prints into dev_* prints ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: ena: update ena documentationShay Agroskin
The PCI vendor IDs in the documentation inaccurately describe the ENA devices. For example, the 1d0f:ec20 can have LLQ support. The driver loads in LLQ mode by default, and a message is printed to the kernel ring if the mode isn't supported by the device, so the device table isn't needed. Also, LLQ can support various entry sizes, so the documentation is updated to reflect that. Interrupt moderation description is also updated to be more accurate. Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: ena: Fix all static chekers' warningsShay Agroskin
After running Sparse checker on the driver using make C=1 M=drivers/net/ethernet/amazon/ena the only error that is thrown is: sparse: sparse: Using plain integer as NULL pointer about the line struct ena_calc_queue_size_ctx calc_queue_ctx = { 0 }; This patch fixes this warning, thus making our driver free (for now) of Sparse errors/warnings. To make a more complete work, this patch also fixes all static warnings that were found using an internal static checker. Signed-off-by: Ido Segev <idose@amazon.com> Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: ena: Change RSS related macros and variables namesShay Agroskin
The formal name changes to "ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG". Indirection is the ability to reference "something" using "something else" instead of the value itself. Indirection table, as the name implies, is the ability to reference CPU/Queue value using hash-to-CPU table instead of CPU/Queue itself. This patch renames the variable keys_num, which describes the number of words in the RSS hash key, to key_parts which makes its purpose clearer in RSS context. Signed-off-by: Amit Bernstein <amitbern@amazon.com> Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: ena: Remove redundant print of placement policyShay Agroskin
The placement policy is printed in the process of queue creation in ena_up(). No need to print it in ena_probe(). Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com> Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: ena: Capitalize all log strings and improve code readabilityShay Agroskin
Capitalize all log strings printed by the ena driver to make their format uniform across it. Also fix indentation, spelling mistakes and comments to improve code readability. This also includes adding comments to macros/enums whose purpose might be difficult to understand. Separate some code into functions to make it easier to understand the purpose of these lines. Signed-off-by: Amit Bernstein <amitbern@amazon.com> Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: ena: Change log message to netif/dev functionShay Agroskin
Make log prints in ena_netdev use the same log functions as the rest of the driver. For the sake of consistency, all prints in ena_netdev file were converted into netif_* format except where netdev struct isn't yet defined. For these places, dev_* log functions are used (similar to the patch for ena_com files). This commit leaves some corner cases which would be changed in a future patch. Signed-off-by: Amit Bernstein <amitbern@amazon.com> Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: ena: Change license into format to SPDX in all filesShay Agroskin
All ena files should now use SPDX format in their license string. This doesn't change the license of the files, but rather states the same license in fewer words. Also update the license years in some of the files. Signed-off-by: Shay Agroskin <shayagr@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21chelsio: simplify the return expression of t3_ael2020_phy_prep()Qinglang Miao
Simplify the return expression. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21connector: simplify the return expression of cn_add_callback()Qinglang Miao
Simplify the return expression. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21enetc: simplify the return expression of enetc_vf_set_mac_addr()Qinglang Miao
Simplify the return expression. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21ice: simplify the return expression of ice_finalize_update()Qinglang Miao
Simplify the return expression. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21mlxsw: spectrum_router: simplify the return expression of ↵Qinglang Miao
__mlxsw_sp_router_init() Simplify the return expression. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: hns3: simplify the return expression of hclgevf_client_start()Qinglang Miao
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21net: qlcnic: simplify the return expression of qlcnic_83xx_shutdownQinglang Miao
Simplify the return expression. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-21Merge branch 'rcu/urgent' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull RCU fix from Paul McKenney: "This contains a single commit that fixes a bug that was introduced in the last merge window. This bug causes a compiler warning complaining about show_rcu_tasks_classic_gp_kthread() being an unused static function in !SMP kernels. The fix is straightforward, just adding an 'inline' to make this a static inline function, thus avoiding the warning. This bug was reported by Laurent Pinchart, who would like it fixed sooner rather than later" * 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: rcu-tasks: Prevent complaints of unused show_rcu_tasks_classic_gp_kthread()
2020-09-21bpf: Fix potential call bpf_link_free() in atomic contextMuchun Song
The in_atomic() macro cannot always detect atomic context, in particular, it cannot know about held spinlocks in non-preemptible kernels. Although, there is no user call bpf_link_put() with holding spinlock now, be on the safe side, so we can avoid this in the future. Signed-off-by: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200917074453.20621-1-songmuchun@bytedance.com
2020-09-21Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm fixes from Paolo Bonzini: "ARM: - fix fault on page table writes during instruction fetch s390: - doc improvement x86: - The obvious patches are always the ones that turn out to be completely broken. /me hangs his head in shame" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: Revert "KVM: Check the allocation of pv cpu mask" KVM: arm64: Remove S1PTW check from kvm_vcpu_dabt_iswrite() KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetch docs: kvm: add documentation for KVM_CAP_S390_DIAG318
2020-09-21Merge tag 'libnvdimm-fixes-5.9-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull libnvdimm fix from Dan Williams: "Fix compilation for the new dax_supported() exported helper" * tag 'libnvdimm-fixes-5.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: dax: Fix compilation for CONFIG_DAX && !CONFIG_FS_DAX
2020-09-21dax: Fix compilation for CONFIG_DAX && !CONFIG_FS_DAXJan Kara
dax_supported() is defined whenever CONFIG_DAX is enabled. So dummy implementation should be defined only in !CONFIG_DAX case, not in !CONFIG_FS_DAX case. Fixes: e2ec51282545 ("dm: Call proper helper to determine dax support") Cc: <stable@vger.kernel.org> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2020-09-21io_uring: fix openat/openat2 unified prep handlingJens Axboe
A previous commit unified how we handle prep for these two functions, but this means that we check the allowed context (SQPOLL, specifically) later than we should. Move the ring type checking into the two parent functions, instead of doing it after we've done some setup work. Fixes: ec65fea5a8d7 ("io_uring: deduplicate io_openat{,2}_prep()") Reported-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-21io_uring: mark statx/files_update/epoll_ctl as non-SQPOLLJens Axboe
These will naturally fail when attempted through SQPOLL, but either with -EFAULT or -EBADF. Make it explicit that these are not workable through SQPOLL and return -EINVAL, just like other ops that need to use ->files. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-21tools/io_uring: fix compile breakageDouglas Gilbert
It would seem none of the kernel continuous integration does this: $ cd tools/io_uring $ make Otherwise it may have noticed: cc -Wall -Wextra -g -D_GNU_SOURCE -c -o io_uring-bench.o io_uring-bench.c io_uring-bench.c:133:12: error: static declaration of ‘gettid’ follows non-static declaration 133 | static int gettid(void) | ^~~~~~ In file included from /usr/include/unistd.h:1170, from io_uring-bench.c:27: /usr/include/x86_64-linux-gnu/bits/unistd_ext.h:34:16: note: previous declaration of ‘gettid’ was here 34 | extern __pid_t gettid (void) __THROW; | ^~~~~~ make: *** [<builtin>: io_uring-bench.o] Error 1 The problem on Ubuntu 20.04 (with lk 5.9.0-rc5) is that unistd.h already defines gettid(). So prefix the local definition with "lk_". Signed-off-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-21io_uring: don't use retry based buffered reads for non-async bdevJens Axboe
Some block devices, like dm, bubble back -EAGAIN through the completion handler. We check for this in io_read(), but don't honor it for when we have copied the iov. Return -EAGAIN for this case before retrying, to force punt to io-wq. Fixes: bcf5a06304d6 ("io_uring: support true async buffered reads, if file provides it") Reported-by: Zorro Lang <zlang@redhat.com> Tested-by: Zorro Lang <zlang@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-21io_uring: don't re-setup vecs/iter in io_resumit_prep() is already thereJens Axboe
If we already have mapped the necessary data for retry, then don't set it up again. It's a pointless operation, and we leak the iovec if it's a large (non-stack) vec. Fixes: b63534c41e20 ("io_uring: re-issue block requests that failed because of resources") Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-09-21MAINTAINERS: Add reviewer entry for microchip mcp25xxfd SPI-CAN network driverThomas Kopp
This patch adds Thomas Kopp as a reviewer for the mcp25xxfd CAN driver. Signed-off-by: Thomas Kopp <thomas.kopp@microchip.com> Link: https://lore.kernel.org/r/20200916101334.1277-1-thomas.kopp@microchip.com Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-09-21MAINTAINERS: Add entry for Microchip MCP25XXFD SPI-CAN network driverManivannan Sadhasivam
Add MAINTAINERS entry for Microchip MCP25XXFD SPI-CAN network driver. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/20200910133806.25077-7-manivannan.sadhasivam@linaro.org Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-09-21can: mcp25xxfd: add listen-only modeKurt Van Dijck
This commit enables listen-only mode, which works internally like CANFD mode. Signed-off-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Link: https://lore.kernel.org/r/20200918172536.2074504-5-mkl@pengutronix.de
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