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Filename Latest commit message Latest commit date
Javed Hasan 935fa0d5a5 scsi: libfc: Avoid invoking response handler twice if ep is already completed 
[ Upstream commit b2b0f16fa65e910a3ec8771206bb49ee87a54ac5 ]

A race condition exists between the response handler getting called because
of exchange_mgr_reset() (which clears out all the active XIDs) and the
response we get via an interrupt.

Sequence of events:

	 rport ba0200: Port timeout, state PLOGI
	 rport ba0200: Port entered PLOGI state from PLOGI state
	 xid 1052: Exchange timer armed : 20000 msecs      xid timer armed here
	 rport ba0200: Received LOGO request while in state PLOGI
	 rport ba0200: Delete port
	 rport ba0200: work event 3
	 rport ba0200: lld callback ev 3
	 bnx2fc: rport_event_hdlr: event = 3, port_id = 0xba0200
	 bnx2fc: ba0200 - rport not created Yet!!
	 /* Here we reset any outstanding exchanges before
	 freeing rport using the exch_mgr_reset() */
	 xid 1052: Exchange timer canceled
	 /* Here we got two responses for one xid */
	 xid 1052: invoking resp(), esb 20000000 state 3
	 xid 1052: invoking resp(), esb 20000000 state 3
	 xid 1052: fc_rport_plogi_resp() : ep->resp_active 2
	 xid 1052: fc_rport_plogi_resp() : ep->resp_active 2

Skip the response if the exchange is already completed.

Link: https://lore.kernel.org/r/20201215194731.2326-1-jhasan@marvell.com
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-02-07 15:35:48 +01:00
arch x86: __always_inline __{rd,wr}msr() 2021-02-07 15:35:48 +01:00
block Revert "Revert "block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT"" 2021-02-07 15:35:47 +01:00
certs
crypto crypto: asym_tpm: correct zero out potential secrets 2021-01-12 20:16:17 +01:00
Documentation KVM: Forbid the use of tagged userspace addresses for memslots 2021-02-03 23:25:57 +01:00
drivers scsi: libfc: Avoid invoking response handler twice if ep is already completed 2021-02-07 15:35:48 +01:00
fs btrfs: backref, use correct count to resolve normal data refs 2021-02-07 15:35:47 +01:00
include tcp: make TCP_USER_TIMEOUT accurate for zero window probes 2021-02-07 15:35:47 +01:00
init exec: Transform exec_update_mutex into a rw_semaphore 2021-01-09 13:44:55 +01:00
ipc
kernel PM: hibernate: flush swap writer after marking 2021-02-03 23:25:57 +01:00
lib lib/raid6: Let $(UNROLL) rules work with macOS userland 2021-01-19 18:26:15 +01:00
LICENSES
mm Revert "mm/slub: fix a memory leak in sysfs_slab_add()" 2021-01-30 13:54:09 +01:00
net net_sched: gen_estimator: support large ewma log 2021-02-07 15:35:47 +01:00
samples samples: bpf: Fix lwt_len_hist reusing previous BPF map 2020-12-30 11:51:12 +01:00
scripts depmod: handle the case of /sbin/depmod without /sbin in PATH 2021-01-12 20:16:10 +01:00
security dump_common_audit_data(): fix racy accesses to ->d_name 2021-01-19 18:26:16 +01:00
sound ASoC: topology: Fix memory corruption in soc_tplg_denum_create_values() 2021-02-03 23:26:01 +01:00
tools selftests: forwarding: Specify interface when invoking mausezahn 2021-02-03 23:26:01 +01:00
usr
virt KVM: Forbid the use of tagged userspace addresses for memslots 2021-02-03 23:25:57 +01:00
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Makefile Linux 5.4.95 2021-02-03 23:26:02 +01:00
README

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.