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Yanjiang Jin 0cdee8d71f scsi: smartpqi: call pqi_free_interrupts() in pqi_shutdown() 
[ Upstream commit 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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2019-01-26 09:20:50 +01:00
arch x86/topology: Use total_cpus for max logical packages calculation 2019-01-26 09:20:48 +01:00
block block: use rcu_work instead of call_rcu to avoid sleep in softirq 2019-01-22 21:09:57 +01:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto crypto: ecc - regularize scalar for scalar multiplication 2019-01-26 09:20:41 +01:00
Documentation x86/speculation/l1tf: Drop the swap storage limit restriction when l1tf=off 2019-01-09 17:45:54 +01:00
drivers scsi: smartpqi: call pqi_free_interrupts() in pqi_shutdown() 2019-01-26 09:20:50 +01:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs quota: Lock s_umount in exclusive mode for Q_XQUOTA{ON,OFF} quotactls. 2019-01-26 09:20:49 +01:00
include scsi: target/core: Make sure that target_wait_for_sess_cmds() waits long enough 2019-01-26 09:20:45 +01:00
init kbuild: Disable LD_DEAD_CODE_DATA_ELIMINATION with ftrace & GCC <= 4.7 2019-01-22 21:09:54 +01:00
ipc ipc: IPCMNI limit check for semmni 2018-10-31 08:54:14 -07:00
kernel bpf: relax verifier restriction on BPF_MOV | BPF_ALU 2019-01-26 09:20:45 +01:00
lib fix int_sqrt64() for very large numbers 2019-01-22 21:09:55 +01:00
LICENSES This is a fairly typical cycle for documentation. There's some welcome 2018-10-24 18:01:11 +01:00
mm mm: page_mapped: don't assume compound page is huge or THP 2019-01-16 22:03:26 +01:00
net netfilter: ipt_CLUSTERIP: fix deadlock in netns exit routine 2019-01-26 09:20:47 +01:00
samples samples: bpf: fix: error handling regarding kprobe_events 2019-01-26 09:20:42 +01:00
scripts kconfig: fix memory leak when EOF is encountered in quotation 2019-01-26 09:20:46 +01:00
security selinux: always allow mounting submounts 2019-01-26 09:20:42 +01:00
sound ALSA: bebob: fix model-id of unit for Apogee Ensemble 2019-01-26 09:20:49 +01:00
tools perf tools: Add missing open_memstream() prototype for systems lacking it 2019-01-26 09:20:48 +01:00
usr initramfs: move gen_initramfs_list.sh from scripts/ to usr/ 2018-08-22 23:21:44 +09:00
virt KVM: arm/arm64: vgic: Fix off-by-one bug in vgic_get_irq() 2019-01-09 17:46:04 +01:00
.clang-format page cache: Convert find_get_pages_contig to XArray 2018-10-21 10:46:34 -04:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Add hch to .get_maintainer.ignore 2015-08-21 14:30:10 -07:00
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap mailmap: Update email for Punit Agrawal 2018-11-05 10:02:11 +00:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS MAINTAINERS: update entry for MMP platform 2018-12-03 12:39:57 -08:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-12-21 14:21:17 -08:00
Makefile kbuild: let fixdep directly write to .*.cmd files 2019-01-26 09:20:43 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.