From: Jason Gunthorpe <jgg@ziepe.ca>
To: Selvin Xavier <selvin.xavier@broadcom.com>
Cc: dledford@redhat.com, linux-rdma@vger.kernel.org
Subject: Re: [PATCH rdma-rc] RDMA/bnxt_re: Disable atomic support on VFs
Date: Fri, 27 Aug 2021 09:31:46 -0300 [thread overview]
Message-ID: <20210827123146.GH1200268@ziepe.ca> (raw)
In-Reply-To: <1630037738-20276-1-git-send-email-selvin.xavier@broadcom.com>
On Thu, Aug 26, 2021 at 09:15:38PM -0700, Selvin Xavier wrote:
> Following Host crash is observed when pci_enable_atomic_ops_to_root
> is called with VF PCI device.
>
> PID: 4481 TASK: ffff89c6941b0000 CPU: 53 COMMAND: "bash"
> #0 [ffff9a94817136d8] machine_kexec at ffffffffb90601a4
> #1 [ffff9a9481713728] __crash_kexec at ffffffffb9190d5d
> #2 [ffff9a94817137f0] crash_kexec at ffffffffb9191c4d
> #3 [ffff9a9481713808] oops_end at ffffffffb9025cd6
> #4 [ffff9a9481713828] page_fault_oops at ffffffffb906e417
> #5 [ffff9a9481713888] exc_page_fault at ffffffffb9a0ad14
> #6 [ffff9a94817138b0] asm_exc_page_fault at ffffffffb9c00ace
> [exception RIP: pcie_capability_read_dword+28]
> RIP: ffffffffb952fd5c RSP: ffff9a9481713960 RFLAGS: 00010246
> RAX: 0000000000000001 RBX: ffff89c6b1096000 RCX: 0000000000000000
> RDX: ffff9a9481713990 RSI: 0000000000000024 RDI: 0000000000000000
> RBP: 0000000000000080 R8: 0000000000000008 R9: ffff89c64341a2f8
> R10: 0000000000000002 R11: 0000000000000000 R12: ffff89c648bab000
> R13: 0000000000000000 R14: 0000000000000000 R15: ffff89c648bab0c8
> ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
> #7 [ffff9a9481713988] pci_enable_atomic_ops_to_root at ffffffffb95359a6
> #8 [ffff9a94817139c0] bnxt_qplib_determine_atomics at ffffffffc08c1a33 [bnxt_re]
> #9 [ffff9a94817139d0] bnxt_re_dev_init at ffffffffc08ba2d1 [bnxt_re]
> RIP: 00007f450602f648 RSP: 00007ffe880869e8 RFLAGS: 00000246
> RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f450602f648
> RDX: 0000000000000002 RSI: 0000555c566c4a60 RDI: 0000000000000001
> RBP: 0000555c566c4a60 R8: 000000000000000a R9: 00007f45060c2580
> R10: 000000000000000a R11: 0000000000000246 R12: 00007f45063026e0
> R13: 0000000000000002 R14: 00007f45062fd880 R15: 0000000000000002
> ORIG_RAX: 0000000000000001 CS: 0033 SS: 002b
This feels like a bug in pci_enable_atomic_ops_to_root()? I assume it
hit a case where bus->self == NULL?
Why not fix it there?
Jason
next prev parent reply other threads:[~2021-08-27 12:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-27 4:15 [PATCH rdma-rc] RDMA/bnxt_re: Disable atomic support on VFs Selvin Xavier
2021-08-27 12:31 ` Jason Gunthorpe [this message]
2021-08-31 15:57 ` Selvin Xavier
2021-09-01 11:50 ` Jason Gunthorpe
2021-09-16 15:05 ` Selvin Xavier
2021-09-16 15:09 ` Jason Gunthorpe
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