- 30 Aug, 2024 12 commits
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Eric Dumazet authored
Host wide ICMP ratelimiter should be per netns, to provide better isolation. Following patch in this series makes the sysctl per netns. Signed-off-by:
Eric Dumazet <edumazet@google.com> Reviewed-by:
David Ahern <dsahern@kernel.org> Link: https://patch.msgid.link/20240829144641.3880376-3-edumazet@google.comSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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Eric Dumazet authored
ICMP messages are ratelimited : After the blamed commits, the two rate limiters are applied in this order: 1) host wide ratelimit (icmp_global_allow()) 2) Per destination ratelimit (inetpeer based) In order to avoid side-channels attacks, we need to apply the per destination check first. This patch makes the following change : 1) icmp_global_allow() checks if the host wide limit is reached. But credits are not yet consumed. This is deferred to 3) 2) The per destination limit is checked/updated. This might add a new node in inetpeer tree. 3) icmp_global_consume() consumes tokens if prior operations succeeded. This means that host wide ratelimit is still effective in keeping inetpeer tree small even under DDOS. As a bonus, I removed icmp_global.lock as the fast path can use a lock-free operation. Fixes: c0303efe ("net: reduce cycles spend on ICMP replies that gets rate limited") Fixes: 4cdf507d ("icmp: add a global rate limitation") Reported-by:
Keyu Man <keyu.man@email.ucr.edu> Signed-off-by:
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Yan Zhen authored
Using ERR_CAST() is more reasonable and safer, When it is necessary to convert the type of an error pointer and return it. Signed-off-by:
Yan Zhen <yanzhen@vivo.com> Acked-by:
Eelco Chaudron <echaudro@redhat.com> Reviewed-by:
Aaron Conole <aconole@redhat.com> Link: https://patch.msgid.link/20240829095509.3151987-1-yanzhen@vivo.comSigned-off-by:
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Shen Lichuan authored
Use ERR_CAST() as it is designed for casting an error pointer to another type. Signed-off-by:
Shen Lichuan <shenlichuan@vivo.com> Link: https://patch.msgid.link/20240829072538.33195-1-shenlichuan@vivo.comSigned-off-by:
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Shen Lichuan authored
As opposed to open-code, using the ERR_CAST macro clearly indicates that this is a pointer to an error value and a type conversion was performed. Signed-off-by:
Jacob Keller <jacob.e.keller@intel.com> Reviewed-by:
Martin Habets <habetsm.xilinx@gmail.com> Reviewed-by:
Edward Cree <ecree.xilinx@gmail.com> Link: https://patch.msgid.link/20240829021253.3066-1-shenlichuan@vivo.comSigned-off-by:
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David S. Miller authored
FUJITA Tomonori says: ==================== net: phy: add Applied Micro QT2025 PHY driver This patchset adds a PHY driver for Applied Micro Circuits Corporation QT2025. The first patch adds Rust equivalent to include/linux/sizes.h, makes code more readable. The 2-5th patches update the PHYLIB Rust bindings. The 4th and 5th patches have been reviewed previously in a different thread [1]. QT2025 PHY support was implemented as a part of an Ethernet driver for Tehuti Networks TN40xx chips. Multiple vendors (DLink, Asus, Edimax, QNAP, etc) developed adapters based on TN40xx chips. Tehuti Networks went out of business and the driver wasn't merged into mainline. But it's still distributed with some of the hardware (and also available on some vendor sites). The original driver handles multiple PHY hardware (AMCC QT2025, TI TLK10232, Aqrate AQR105, and Marvell MV88X3120, MV88X3310, and MV88E2010). I divided the original driver into MAC and PHY drivers and implemented a QT2025 PHY driver in Rust. The MAC driver for Tehuti Networks TN40xx chips was already merged in 6.11-rc1. The MAC and this PHY drivers have been tested with Edimax EN-9320SFP+ 10G network adapter. [1] https://lore.kernel.org/rust-for-linux/20240607052113.69026-1-fujita.tomonori@gmail.com/ v7: - add Trevor as Reviewer to MAINTAINERS file entry - add Trevor Reviewed-by - add/fix comments - replace uppercase hex with lowercase - remove unnecessary code - update the commit message (1st patch) v6: https://lore.kernel.org/netdev/20240820225719.91410-1-fujita.tomonori@gmail.com/ - improve comments - make the logic to load firmware more readable - add Copy trait to reg::{C22 and C45} - add Trevor Reviewed-by v5: https://lore.kernel.org/netdev/20240819005345.84255-1-fujita.tomonori@gmail.com/ - fix the comments (3th patch) - add RUST_FW_LOADER_ABSTRACTIONS dependency - add Andrew and Benno Reviewed-by v4: https://lore.kernel.org/netdev/20240817051939.77735-1-fujita.tomonori@gmail.com/ - fix the comments - add Andrew's Reviewed-by - fix the order of tags - remove wrong endianness conversion v3: https://lore.kernel.org/netdev/20240804233835.223460-1-fujita.tomonori@gmail.com/ - use addr_of_mut!` to avoid intermediate mutable reference - update probe callback's Safety comment - add MODULE_FIRMWARE equivalent - add Alice's Reviewed-by v2: https://lore.kernel.org/netdev/20240731042136.201327-1-fujita.tomonori@gmail.com/ - add comments in accordance with the hw datasheet - unify C22 and C45 APIs - load firmware in probe callback instead of config_init - use firmware API - handle firmware endian - check firmware size - use SZ_*K constants - avoid confusing phy_id variable v1: https://lore.kernel.org/netdev/20240415104701.4772-1-fujita.tomonori@gmail.com/ ==================== rom: FUJITA Tomonori <fujita.tomonori@gmail.com> To: netdev@vger.kernel.org Cc: rust-for-linux@vger.kernel.org, andrew@lunn.ch, tmgross@umich.edu, miguel.ojeda.sandonis@gmail.com, benno.lossin@proton.me, aliceryhl@google.com Subject: [PATCH net-next v7 0/6] net: phy: add Applied Micro QT2025 PHY driver Date: Sat, 24 Aug 2024 02:06:10 +0000 [thread overview] Message-ID: <20240824020617.113828-1-fujita.tomonori@gmail.com> (raw) This patchset adds a PHY driver for Applied Micro Circuits Corporation QT2025. The first patch adds Rust equivalent to include/linux/sizes.h, makes code more readable. The 2-5th patches update the PHYLIB Rust bindings. The 4th and 5th patches have been reviewed previously in a different thread [1]. QT2025 PHY support was implemented as a part of an Ethernet driver for Tehuti Networks TN40xx chips. Multiple vendors (DLink, Asus, Edimax, QNAP, etc) developed adapters based on TN40xx chips. Tehuti Networks went out of business and the driver wasn't merged into mainline. But it's still distributed with some of the hardware (and also available on some vendor sites). The original driver handles multiple PHY hardware (AMCC QT2025, TI TLK10232, Aqrate AQR105, and Marvell MV88X3120, MV88X3310, and MV88E2010). I divided the original driver into MAC and PHY drivers and implemented a QT2025 PHY driver in Rust. The MAC driver for Tehuti Networks TN40xx chips was already merged in 6.11-rc1. The MAC and this PHY drivers have been tested with Edimax EN-9320SFP+ 10G network adapter. [1] https://lore.kernel.org/rust-for-linux/20240607052113.69026-1-fujita.tomonori@gmail.com/ v7: - add Trevor as Reviewer to MAINTAINERS file entry - add Trevor Reviewed-by - add/fix comments - replace uppercase hex with lowercase - remove unnecessary code - update the commit message (1st patch) v6: https://lore.kernel.org/netdev/20240820225719.91410-1-fujita.tomonori@gmail.com/ - improve comments - make the logic to load firmware more readable - add Copy trait to reg::{C22 and C45} - add Trevor Reviewed-by v5: https://lore.kernel.org/netdev/20240819005345.84255-1-fujita.tomonori@gmail.com/ - fix the comments (3th patch) - add RUST_FW_LOADER_ABSTRACTIONS dependency - add Andrew and Benno Reviewed-by v4: https://lore.kernel.org/netdev/20240817051939.77735-1-fujita.tomonori@gmail.com/ - fix the comments - add Andrew's Reviewed-by - fix the order of tags - remove wrong endianness conversion v3: https://lore.kernel.org/netdev/20240804233835.223460-1-fujita.tomonori@gmail.com/ - use addr_of_mut!` to avoid intermediate mutable reference - update probe callback's Safety comment - add MODULE_FIRMWARE equivalent - add Alice's Reviewed-by v2: https://lore.kernel.org/netdev/20240731042136.201327-1-fujita.tomonori@gmail.com/ - add comments in accordance with the hw datasheet - unify C22 and C45 APIs - load firmware in probe callback instead of config_init - use firmware API - handle firmware endian - check firmware size - use SZ_*K constants - avoid confusing phy_id variable v1: https://lore.kernel.org/netdev/20240415104701.4772-1-fujita.tomonori@gmail.com/Signed-off-by:
David S. Miller <davem@davemloft.net> rom: FUJITA Tomonori <fujita.tomonori@gmail.com> To: netdev@vger.kernel.org Cc: rust-for-linux@vger.kernel.org, andrew@lunn.ch, tmgross@umich.edu, miguel.ojeda.sandonis@gmail.com, benno.lossin@proton.me, aliceryhl@google.com Subject: [PATCH net-next v7 0/6] net: phy: add Applied Micro QT2025 PHY driver Date: Sat, 24 Aug 2024 02:06:10 +0000 [thread overview] Message-ID: <20240824020617.113828-1-fujita.tomonori@gmail.com> (raw) This patchset adds a PHY driver for Applied Micro Circuits Corporation QT2025. The first patch adds Rust equivalent to include/linux/sizes.h, makes code more readable. The 2-5th patches update the PHYLIB Rust bindings. The 4th and 5th patches have been reviewed previously in a different thread [1]. QT2025 PHY support was implemented as a part of an Ethernet driver for Tehuti Networks TN40xx chips. Multiple vendors (DLink, Asus, Edimax, QNAP, etc) developed adapters based on TN40xx chips. Tehuti Networks went out of business and the driver wasn't merged into mainline. But it's still distributed with some of the hardware (and also available on some vendor sites). The original driver handles multiple PHY hardware (AMCC QT2025, TI TLK10232, Aqrate AQR105, and Marvell MV88X3120, MV88X3310, and MV88E2010). I divided the original driver into MAC and PHY drivers and implemented a QT2025 PHY driver in Rust. The MAC driver for Tehuti Networks TN40xx chips was already merged in 6.11-rc1. The MAC and this PHY drivers have been tested with Edimax EN-9320SFP+ 10G network adapter. [1] https://lore.kernel.org/rust-for-linux/20240607052113.69026-1-fujita.tomonori@gmail.com/ v7: - add Trevor as Reviewer to MAINTAINERS file entry - add Trevor Reviewed-by - add/fix comments - replace uppercase hex with lowercase - remove unnecessary code - update the commit message (1st patch) v6: https://lore.kernel.org/netdev/20240820225719.91410-1-fujita.tomonori@gmail.com/ - improve comments - make the logic to load firmware more readable - add Copy trait to reg::{C22 and C45} - add Trevor Reviewed-by v5: https://lore.kernel.org/netdev/20240819005345.84255-1-fujita.tomonori@gmail.com/ - fix the comments (3th patch) - add RUST_FW_LOADER_ABSTRACTIONS dependency - add Andrew and Benno Reviewed-by v4: https://lore.kernel.org/netdev/20240817051939.77735-1-fujita.tomonori@gmail.com/ - fix the comments - add Andrew's Reviewed-by - fix the order of tags - remove wrong endianness conversion v3: https://lore.kernel.org/netdev/20240804233835.223460-1-fujita.tomonori@gmail.com/ - use addr_of_mut!` to avoid intermediate mutable reference - update probe callback's Safety comment - add MODULE_FIRMWARE equivalent - add Alice's Reviewed-by v2: https://lore.kernel.org/netdev/20240731042136.201327-1-fujita.tomonori@gmail.com/ - add comments in accordance with the hw datasheet - unify C22 and C45 APIs - load firmware in probe callback instead of config_init - use firmware API - handle firmware endian - check firmware size - use SZ_*K constants - avoid confusing phy_id variable v1: https://lore.kernel.org/netdev/20240415104701.4772-1-fujita.tomonori@gmail.com/Signed-off-by:
Andrew Lunn <andrew@lunn.ch>
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FUJITA Tomonori authored
This driver supports Applied Micro Circuits Corporation QT2025 PHY, based on a driver for Tehuti Networks TN40xx chips. The original driver for TN40xx chips supports multiple PHY hardware (AMCC QT2025, TI TLK10232, Aqrate AQR105, and Marvell 88X3120, 88X3310, and MV88E2010). This driver is extracted from the original driver and modified to a PHY driver in Rust. This has been tested with Edimax EN-9320SFP+ 10G network adapter. Reviewed-by:
Trevor Gross <tmgross@umich.edu> Reviewed-by:
FUJITA Tomonori <fujita.tomonori@gmail.com> Signed-off-by:
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FUJITA Tomonori authored
Add unified genphy_read_status function for C22 and C45 registers. Instead of having genphy_c22 and genphy_c45 methods, this unifies genphy_read_status functions for C22 and C45. Reviewed-by:
Benno Lossin <benno.lossin@proton.me> Reviewed-by:
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FUJITA Tomonori authored
Add the unified read/write API for C22 and C45 registers. The abstractions support access to only C22 registers now. Instead of adding read/write_c45 methods specifically for C45, a new reg module supports the unified API to access C22 and C45 registers with trait, by calling an appropriate phylib functions. Reviewed-by:
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FUJITA Tomonori authored
Implement AsRef<kernel::device::Device> trait for Device. A PHY driver needs a reference to device::Device to call the firmware API. Reviewed-by:
Alice Ryhl <aliceryhl@google.com> Reviewed-by:
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FUJITA Tomonori authored
Support phy_driver probe callback, used to set up device-specific structures. Reviewed-by:
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FUJITA Tomonori authored
Add rust equivalent to include/linux/sizes.h, makes code more readable. Only SZ_*K that QT2025 PHY driver uses are added. Make generated constants accessible with a proper type. Reviewed-by:
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- 29 Aug, 2024 28 commits
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Jakub Kicinski authored
Michael Chan says: ==================== bnxt_en: Update for net-next This series starts with 2 patches to support firmware crash dump. The driver allocates the required DMA memory ahead of time for firmware to store the crash dump if and when it crashes. Patch 3 adds priority and TPID for the .ndo_set_vf_vlan() callback. Note that this was rejected and reverted last year and it is being re-submitted after recent changes in the guidelines. The remaining patches are MSIX related. Legacy interrupt is no longer supported by firmware so we remove the support in the driver. We then convert to use the newer kernel APIs to allocate and enable MSIX vectors. The last patch adds support for dynamic MSIX. v3: https://lore.kernel.org/20240823195657.31588-1-michael.chan@broadcom.com v2: https://lore.kernel.org/20240816212832.185379-1-michael.chan@broadcom.com v1: https://lore.kernel.org/20240713234339.70293-1-michael.chan@broadcom.com ==================== Link: https://patch.msgid.link/20240828183235.128948-1-michael.chan@broadcom.comSigned-off-by:
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Michael Chan authored
A range of MSIX vectors are allocated at initialization for the number needed for RocE and L2. During run-time, if the user increases or decreases the number of L2 rings, all the MSIX vectors have to be freed and a new range has to be allocated. This is not optimal and causes disruptions to RoCE traffic every time there is a change in L2 MSIX. If the system supports dynamic MSIX allocations, use dynamic allocation to add new L2 MSIX vectors or free unneeded L2 MSIX vectors. RoCE traffic is not affected using this scheme. Reviewed-by:
Hongguang Gao <hongguang.gao@broadcom.com> Reviewed-by:
Somnath Kotur <somnath.kotur@broadcom.com> Reviewed-by:
Simon Horman <horms@kernel.org> Reviewed-by:
Przemek Kitszel <przemyslaw.kitszel@intel.com> Signed-off-by:
Michael Chan <michael.chan@broadcom.com> Reviewed-by:
Michal Swiatkowski <michal.swiatkowski@linux.intel.com> Link: https://patch.msgid.link/20240828183235.128948-10-michael.chan@broadcom.comSigned-off-by:
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Michael Chan authored
If dynamic MSIX allocation is supported, additional MSIX can be allocated at run-time without reinitializing the existing MSIX entries. The first step to support this dynamic scheme is to allocate a large enough bp->irq_tbl if dynamic allocation is supported. Reviewed-by:
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Michael Chan authored
Use the new pci_alloc_irq_vectors() and pci_free_irq_vectors() to replace the deprecated pci_enable_msix_range() and pci_disable_msix(). Reviewed-by:
Pavan Chebbi <pavan.chebbi@broadcom.com> Reviewed-by:
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Michael Chan authored
In legacy INTX mode, a register is mapped so that the INTX handler can read it to determine if the NIC is the source of the interrupt. This and all the related macros are no longer needed now that INTX is no longer supported. Reviewed-by:
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Michael Chan authored
Now that we only support MSIX, the BNXT_FLAG_USING_MSIX is always true. Remove it and any if conditions checking for it. Remove the INTX handler and associated logic. Reviewed-by:
Kalesh AP <kalesh-anakkur.purayil@broadcom.com> Reviewed-by:
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Michael Chan authored
Firmware has deprecated support for legacy INTX in 2022 (since v2.27) and INTX hasn't been tested for many years before that. INTX was only used as a fallback mechansim in case MSIX wasn't available. MSIX is always supported by all firmware. If MSIX capability in PCI config space is not found during probe, abort. Reviewed-by:
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Sreekanth Reddy authored
With recent changes in the .ndo_set_vf_*() guidelines, resubmitting this patch that was reverted eariler in 2023: c2715368 ("Revert "bnxt_en: Support QOS and TPID settings for the SRIOV VLAN") Add these missing settings in the .ndo_set_vf_vlan() method. Older firmware does not support the TPID setting so check for proper support. Remove the unused BNXT_VF_QOS flag. Reviewed-by:
Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by:
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Vikas Gupta authored
Add support for retrieving crash dump using ethtool -w on the supported interface. Reviewed-by:
Andy Gospodarek <andrew.gospodarek@broadcom.com> Reviewed-by:
Vikas Gupta <vikas.gupta@broadcom.com> Signed-off-by:
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Vikas Gupta authored
Newer firmware supports automatic DMA of crash dump to host memory when it crashes. If the feature is supported, allocate the required memory using the existing context memory infrastructure. Communicate the page table containing the DMA addresses to the firmware. Reviewed-by:
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Jakub Kicinski authored
Jon Maloy says: ==================== Adding SO_PEEK_OFF for TCPv6 Adding SO_PEEK_OFF for TCPv6 and selftest for both TCPv4 and TCPv6 ==================== Link: https://patch.msgid.link/20240828183752.660267-1-jmaloy@redhat.comSigned-off-by:
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Jon Maloy authored
We add a selftest to check that the new feature added in commit 05ea4916 ("tcp: add support for SO_PEEK_OFF socket option") works correctly. Reviewed-by:
Jason Xing <kerneljasonxing@gmail.com> Reviewed-by:
Stefano Brivio <sbrivio@redhat.com> Tested-by:
Jon Maloy <jmaloy@redhat.com> Link: https://patch.msgid.link/20240828183752.660267-3-jmaloy@redhat.comSigned-off-by:
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Jon Maloy authored
When doing further testing of the recently added SO_PEEK_OFF feature for TCP I realized I had omitted to add it for TCP/IPv6. I do that here. Fixes: 05ea4916 ("tcp: add support for SO_PEEK_OFF socket option") Reviewed-by:
David Gibson <david@gibson.dropbear.id.au> Reviewed-by:
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Jakub Kicinski authored
Someone reported on GitHub that the YNL NIPA test is failing when run locally. The test builds the tools, and it hits: netdev.c:82:9: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 82 | scanf("%d", &ifindex); I can't repro this on my setups but error seems clear enough. Link: https://github.com/linux-netdev/nipa/discussions/37Reviewed-by:Nicolas Dichtel <nicolas.dichtel@6wind.com> Link: https://patch.msgid.link/20240828173609.2951335-1-kuba@kernel.orgSigned-off-by:
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Jakub Kicinski authored
Hongbo Li says: ==================== replace deprecated strcpy with strscpy The deprecated helper strcpy() performs no bounds checking on the destination buffer. This could result in linear overflows beyond the end of the buffer, leading to all kinds of misbehaviors. The safe replacement is strscpy() [1]. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1] ==================== Link: https://patch.msgid.link/20240828123224.3697672-1-lihongbo22@huawei.comSigned-off-by:
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Hongbo Li authored
The deprecated helper strcpy() performs no bounds checking on the destination buffer. This could result in linear overflows beyond the end of the buffer, leading to all kinds of misbehaviors. The safe replacement is strscpy() [1]. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1] Signed-off-by:
Hongbo Li <lihongbo22@huawei.com> Link: https://patch.msgid.link/20240828123224.3697672-7-lihongbo22@huawei.comSigned-off-by:
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Hongbo Li authored
The deprecated helper strcpy() performs no bounds checking on the destination buffer. This could result in linear overflows beyond the end of the buffer, leading to all kinds of misbehaviors. The safe replacement is strscpy() [1]. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1] Signed-off-by:
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Hongbo Li authored
The deprecated helper strcpy() performs no bounds checking on the destination buffer. This could result in linear overflows beyond the end of the buffer, leading to all kinds of misbehaviors. The safe replacement is strscpy() [1]. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1] Signed-off-by:
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Hongbo Li authored
The deprecated helper strcpy() performs no bounds checking on the destination buffer. This could result in linear overflows beyond the end of the buffer, leading to all kinds of misbehaviors. The safe replacement is strscpy() [1]. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1] Signed-off-by:
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Hongbo Li authored
The deprecated helper strcpy() performs no bounds checking on the destination buffer. This could result in linear overflows beyond the end of the buffer, leading to all kinds of misbehaviors. The safe replacement is strscpy() [1]. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy [1] Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski authored
Cross-merge networking fixes after downstream PR. Conflicts: drivers/net/ethernet/faraday/ftgmac100.c 4186c8d9 ("net: ftgmac100: Ensure tx descriptor updates are visible") e24a6c87 ("net: ftgmac100: Get link speed and duplex for NC-SI") https://lore.kernel.org/0b851ec5-f91d-4dd3-99da-e81b98c9ed28@kernel.org net/ipv4/tcp.c bac76cf8 ("tcp: fix forever orphan socket caused by tcp_abort") edefba66 ("tcp: rstreason: introduce SK_RST_REASON_TCP_STATE for active reset") https://lore.kernel.org/20240828112207.5c199d41@canb.auug.org.au No adjacent changes. Link: https://patch.msgid.link/20240829130829.39148-1-pabeni@redhat.comSigned-off-by:
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Yang Ruibin authored
use dev_err_probe() instead of dev_err() to simplify the error path and standardize the format of the error code. Signed-off-by:
Yang Ruibin <11162571@vivo.com> Reviewed-by:
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Hongbo Li authored
Use the IS_ERR_OR_NULL() helper instead of open-coding a NULL and an error pointer checks to simplify the code and improve readability. Signed-off-by:
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Hongbo Li authored
Using dev_err_cast_probe() to simplify the code. Signed-off-by:
Alvin Šipraga <alsi@bang-olufsen.dk> Link: https://patch.msgid.link/20240828121805.3696631-1-lihongbo22@huawei.comSigned-off-by:
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Hongbo Li authored
Using dev_err_cast_probe() to simplify the code. Signed-off-by:
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Jakub Kicinski authored
Stefan Wahren says: ==================== net: vertexcom: mse102x: Minor clean-ups This series provides some minor clean-ups for the Vertexcom MSE102x driver. ==================== Link: https://patch.msgid.link/20240827191000.3244-1-wahrenst@gmx.netSigned-off-by:
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Stefan Wahren authored
There is already a define for minimum Ethernet frame length without FCS. So used this instead of the magic number. Signed-off-by:
Stefan Wahren <wahrenst@gmx.net> Reviewed-by:
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Stefan Wahren authored
This message is a leftover from initial development. It's unnecessary now and can be dropped. Signed-off-by:
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