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Filename Latest commit message Latest commit date
Sukadev Bhattiprolu bc40616481 ibmvnic: don't stop queue in xmit 
[ Upstream commit 8878e46fcfd46b19964bd90e13b25dd94cbfc9be ]

If adapter's resetting bit is on, discard the packet but don't stop the
transmit queue - instead leave that to the reset code. With this change,
it is possible that we may get several calls to ibmvnic_xmit() that simply
discard packets and return.

But if we stop the queue here, we might end up doing so just after
__ibmvnic_open() started the queues (during a hard/soft reset) and before
the ->resetting bit was cleared. If that happens, there will be no one to
restart queue and transmissions will be blocked indefinitely.

This can cause a TIMEOUT reset and with auto priority failover enabled,
an unnecessary FAILOVER reset to less favored backing device and then a
FAILOVER back to the most favored backing device. If we hit the window
repeatedly, we can get stuck in a loop of TIMEOUT, FAILOVER, FAILOVER
resets leaving the adapter unusable for extended periods of time.

Fixes: 7f5b030830 ("ibmvnic: Free skb's in cases of failure in transmit")
Reported-by: Abdul Haleem <abdhalee@in.ibm.com>
Reported-by: Vaishnavi Bhat <vaish123@in.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-11-17 09:48:40 +01:00
arch KVM: s390: Fix handle_sske page fault handling 2021-11-17 09:48:39 +01:00
block
certs
crypto crypto: pcrypt - Delay write to padata->info 2021-11-17 09:48:40 +01:00
Documentation
drivers ibmvnic: don't stop queue in xmit 2021-11-17 09:48:40 +01:00
fs
include task_stack: Fix end_of_stack() for architectures with upwards-growing stack 2021-11-17 09:48:33 +01:00
init
ipc
kernel PM: hibernate: fix sparse warnings 2021-11-17 09:48:39 +01:00
lib
LICENSES
mm
net udp6: allow SO_MARK ctrl msg to affect routing 2021-11-17 09:48:40 +01:00
samples samples/kretprobes: Fix return value if register_kretprobe() failed 2021-11-17 09:48:39 +01:00
scripts
security smackfs: use netlbl_cfg_cipsov4_del() for deleting cipso_v4_doi 2021-11-17 09:48:39 +01:00
sound
tools selftests/bpf: Fix fclose/pclose mismatch in test_progs 2021-11-17 09:48:40 +01:00
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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.