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Wed, 19 Feb 2025 11:58:10 +0000 Date: Wed, 19 Feb 2025 12:58:00 +0100 From: Larysa Zaremba To: "Buvaneswaran, Sujai" , "Nguyen, Anthony L" CC: "Nguyen, Anthony L" , "intel-wired-lan@lists.osuosl.org" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "Kitszel, Przemyslaw" , Andrew Lunn , Eric Dumazet , "Michal Swiatkowski" , Jakub Kicinski , Paolo Abeni , "David S. 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intel-wired- > > lan@lists.osuosl.org; netdev@vger.kernel.org; linux-kernel@vger.kernel.org > > Cc: Zaremba, Larysa ; Kitszel, Przemyslaw > > ; Andrew Lunn ; > > Eric Dumazet ; Michal Swiatkowski > > ; Jakub Kicinski ; > > Paolo Abeni ; David S. Miller > > Subject: [Intel-wired-lan] [PATCH iwl-net] ice: do not configure destination > > override for switchdev > > > > After switchdev is enabled and disabled later, LLDP packets sending stops, > > despite working perfectly fine before and during switchdev state. > > To reproduce (creating/destroying VF is what triggers the reconfiguration): > > > > devlink dev eswitch set pci/
mode switchdev echo '2' > > > /sys/class/net//device/sriov_numvfs > > echo '0' > /sys/class/net//device/sriov_numvfs > > > > This happens because LLDP relies on the destination override functionality. > > It needs to 1) set a flag in the descriptor, 2) set the VSI permission to make it > > valid. The permissions are set when the PF VSI is first configured, but > > switchdev then enables it for the uplink VSI (which is always the PF) once > > more when configured and disables when deconfigured, which leads to > > software-generated LLDP packets being blocked. > > > > Do not modify the destination override permissions when configuring > > switchdev, as the enabled state is the default configuration that is never > > modified. > > > > Fixes: 1a1c40df2e80 ("ice: set and release switchdev environment") > > Reviewed-by: Michal Swiatkowski > > Signed-off-by: Larysa Zaremba > > --- > > drivers/net/ethernet/intel/ice/ice_eswitch.c | 6 ------ > > drivers/net/ethernet/intel/ice/ice_lib.c | 18 ------------------ > > drivers/net/ethernet/intel/ice/ice_lib.h | 4 ---- > > 3 files changed, 28 deletions(-) > > > Hi, > > Observing below call trace while creating VFs in Switchdev mode with this patch in net-queue. > > [ +0.000188] ice 0000:b1:00.0: Enabling 1 VFs with 17 vectors and 16 queues per VF > [ +0.000062] list_add corruption. next->prev should be prev (ff1d7c830300c6f0), but was ff282828ff282828. (next=ff1d7c5367d61330). > [ +0.000015] ------------[ cut here ]------------ > [ +0.000001] kernel BUG at lib/list_debug.c:29! > [ +0.000007] Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI > [ +0.000004] CPU: 81 UID: 0 PID: 2758 Comm: bash Kdump: loaded Not tainted 6.13.0-rc3+ #1 > [ +0.000003] Hardware name: Dell Inc. PowerEdge R750/06V45N, BIOS 1.3.8 08/31/2021 > [ +0.000002] RIP: 0010:__list_add_valid_or_report+0x61/0xa0 > [ +0.000008] Code: c7 c7 a8 97 b2 8f e8 7e e4 af ff 0f 0b 48 c7 c7 d0 97 b2 8f e8 70 e4 af ff 0f 0b 4c 89 c1 48 c7 c7 f8 97 b2 8f e8 5f e4 af ff <0f> 0b 48 89 d1 4c 89 c6 4c 89 ca 48 c7 c7 50 98 b2 8f e8 48 e4 af > [ +0.000002] RSP: 0018:ff5ebf3d22093d20 EFLAGS: 00010246 > [ +0.000003] RAX: 0000000000000075 RBX: ff1d7c54143a1330 RCX: 0000000000000000 > [ +0.000002] RDX: 0000000000000000 RSI: ff1d7c81f06a0bc0 RDI: ff1d7c81f06a0bc0 > [ +0.000001] RBP: ff1d7c83030097d8 R08: 0000000000000000 R09: ff5ebf3d22093bd8 > [ +0.000002] R10: ff5ebf3d22093bd0 R11: ffffffff901debc8 R12: ff1d7c5367d61330 > [ +0.000001] R13: ff1d7c830300c6f0 R14: 0000000000000000 R15: 0000000000000000 > [ +0.000002] FS: 00007fea5e4e4740(0000) GS:ff1d7c81f0680000(0000) knlGS:0000000000000000 > [ +0.000002] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ +0.000001] CR2: 0000562ef57c7608 CR3: 000000019037c002 CR4: 0000000000773ef0 > [ +0.000002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ +0.000001] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > [ +0.000001] PKRU: 55555554 > [ +0.000002] Call Trace: > [ +0.000003] > [ +0.000002] ? die+0x37/0x90 > [ +0.000007] ? do_trap+0xdd/0x100 > [ +0.000004] ? __list_add_valid_or_report+0x61/0xa0 > [ +0.000003] ? do_error_trap+0x65/0x80 > [ +0.000002] ? __list_add_valid_or_report+0x61/0xa0 > [ +0.000003] ? exc_invalid_op+0x52/0x70 > [ +0.000005] ? __list_add_valid_or_report+0x61/0xa0 > [ +0.000002] ? asm_exc_invalid_op+0x1a/0x20 > [ +0.000007] ? __list_add_valid_or_report+0x61/0xa0 > [ +0.000005] ice_mbx_init_vf_info+0x3c/0x60 [ice] > [ +0.000076] ice_initialize_vf_entry+0x99/0xa0 [ice] > > Regards, > Sujai B > Hello, the problem was addressed by another patch [0] and is not related to this change. [0] https://patchwork.ozlabs.org/project/intel-wired-lan/patch/20250211174322.603652-1-marcin.szycik@linux.intel.com/