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e57b2945aa
We must free all irqs during shutdown, else kexec's 2nd kernel would hang in pqi_wait_for_completion_io() as below: Call trace: pqi_wait_for_completion_io pqi_submit_raid_request_synchronous.constprop.78+0x23c/0x310 [smartpqi] pqi_configure_events+0xec/0x1f8 [smartpqi] pqi_ctrl_init+0x814/0xca0 [smartpqi] pqi_pci_probe+0x400/0x46c [smartpqi] local_pci_probe+0x48/0xb0 pci_device_probe+0x14c/0x1b0 really_probe+0x218/0x3fc driver_probe_device+0x70/0x140 __driver_attach+0x11c/0x134 bus_for_each_dev+0x70/0xc8 driver_attach+0x30/0x38 bus_add_driver+0x1f0/0x294 driver_register+0x74/0x12c __pci_register_driver+0x64/0x70 pqi_init+0xd0/0x10000 [smartpqi] do_one_initcall+0x60/0x1d8 do_init_module+0x64/0x1f8 load_module+0x10ec/0x1350 __se_sys_finit_module+0xd4/0x100 __arm64_sys_finit_module+0x28/0x34 el0_svc_handler+0x104/0x160 el0_svc+0x8/0xc This happens only in the following combinations: 1. smartpqi is built as module, not built-in; 2. We have a disk connected to smartpqi card; 3. Both kexec's 1st and 2nd kernels use this disk as Rootfs' mount point. Signed-off-by: Yanjiang Jin <yanjiang.jin@hxt-semitech.com> Acked-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.