android_kernel_motorola_sm6375

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Filename	Latest commit message	Latest commit date
Rakesh Pandit 82b057caef nvme-pci: fix multiple ctrl removal scheduling Commit `c5f6ce97c1` tries to address multiple resets but fails as work_busy doesn't involve any synchronization and can fail. This is reproducible easily as can be seen by WARNING below which is triggered with line: WARN_ON(dev->ctrl.state == NVME_CTRL_RESETTING) Allowing multiple resets can result in multiple controller removal as well if different conditions inside nvme_reset_work fail and which might deadlock on device_release_driver. [ 480.327007] WARNING: CPU: 3 PID: 150 at drivers/nvme/host/pci.c:1900 nvme_reset_work+0x36c/0xec0 [ 480.327008] Modules linked in: rfcomm fuse nf_conntrack_netbios_ns nf_conntrack_broadcast... [ 480.327044] btusb videobuf2_core ghash_clmulni_intel snd_hwdep cfg80211 acer_wmi hci_uart.. [ 480.327065] CPU: 3 PID: 150 Comm: kworker/u16:2 Not tainted 4.12.0-rc1+ #13 [ 480.327065] Hardware name: Acer Predator G9-591/Mustang_SLS, BIOS V1.10 03/03/2016 [ 480.327066] Workqueue: nvme nvme_reset_work [ 480.327067] task: ffff880498ad8000 task.stack: ffffc90002218000 [ 480.327068] RIP: 0010:nvme_reset_work+0x36c/0xec0 [ 480.327069] RSP: 0018:ffffc9000221bdb8 EFLAGS: 00010246 [ 480.327070] RAX: 0000000000460000 RBX: ffff880498a98128 RCX: dead000000000200 [ 480.327070] RDX: 0000000000000001 RSI: ffff8804b1028020 RDI: ffff880498a98128 [ 480.327071] RBP: ffffc9000221be50 R08: 0000000000000000 R09: 0000000000000000 [ 480.327071] R10: ffffc90001963ce8 R11: 000000000000020d R12: ffff880498a98000 [ 480.327072] R13: ffff880498a53500 R14: ffff880498a98130 R15: ffff880498a98128 [ 480.327072] FS: 0000000000000000(0000) GS:ffff8804c1cc0000(0000) knlGS:0000000000000000 [ 480.327073] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 480.327074] CR2: 00007ffcf3c37f78 CR3: 0000000001e09000 CR4: 00000000003406e0 [ 480.327074] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 480.327075] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 480.327075] Call Trace: [ 480.327079] ? __switch_to+0x227/0x400 [ 480.327081] process_one_work+0x18c/0x3a0 [ 480.327082] worker_thread+0x4e/0x3b0 [ 480.327084] kthread+0x109/0x140 [ 480.327085] ? process_one_work+0x3a0/0x3a0 [ 480.327087] ? kthread_park+0x60/0x60 [ 480.327102] ret_from_fork+0x2c/0x40 [ 480.327103] Code: e8 5a dc ff ff 85 c0 41 89 c1 0f..... This patch addresses the problem by using state of controller to decide whether reset should be queued or not as state change is synchronizated using controller spinlock. Also cancel_work_sync is used to make sure remove cancels the reset_work and waits for it to finish. This patch also changes return value from -ENODEV to more appropriate -EBUSY if nvme_reset fails to change state. Fixes: `c5f6ce97c1` ("nvme: don't schedule multiple resets") Signed-off-by: Rakesh Pandit <rakesh@tuxera.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>		2017-06-07 11:08:50 +02:00
arch	ACPI-related fixes for arm64:	2017-06-02 12:06:27 -07:00
block	blk-mq: fix direct issue	2017-06-06 10:00:35 -06:00
certs
crypto	crypto: skcipher - Add missing API setkey checks	2017-05-18 13:04:05 +08:00
Documentation	Pin control fixes for v4.12:	2017-05-29 10:05:19 -07:00
drivers	nvme-pci: fix multiple ctrl removal scheduling	2017-06-07 11:08:50 +02:00
firmware
fs	Changes since last update:	2017-06-02 12:29:03 -07:00
include	elevator: fix truncation of icq_cache_name	2017-06-06 11:20:47 -06:00
init
ipc
kernel	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching	2017-06-02 08:59:17 -07:00
lib	test_bpf: Add a couple of tests for BPF_JSGE.	2017-05-25 14:37:56 -04:00
mm	mm: vmscan: scan until it finds eligible pages	2017-05-12 15:57:16 -07:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-05-26 13:51:01 -07:00
samples	samples/bpf: run cleanup routines when receiving SIGTERM	2017-05-11 21:43:30 -04:00
scripts	DeviceTree fixes for 4.12-rc:	2017-05-19 15:03:24 -07:00
security
sound	sound fixes for 4.12-rc4	2017-06-02 09:40:47 -07:00
tools	powerpc fixes for 4.12 #4	2017-05-27 09:28:34 -07:00
usr
virt	KVM: arm/arm64: Hold slots_lock when unregistering kvm io bus devices	2017-05-18 11:18:16 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap	power supply and reset changes for the v4.12 series (part 2)	2017-05-12 12:02:21 -07:00
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	TTY/Serial fixes for 4.12-rc3	2017-05-27 09:39:09 -07:00
Makefile	Linux 4.12-rc3	2017-05-28 17:20:53 -07:00
README

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.