【pcie-0212】PCI/AER: Fix the uninitialized aer_fifo

[Fred Kimmy]

[Bug Description]

Current code do not call INIT_KFIFO() to init aer_fifo. This will lead to
kfifo_put() sometimes return 0. This means the fifo was full. In fact, it
is not. It is easy to reproduce the problem by using aer_inject.
aer_inject -s :82:00.0 multiple-corr-nonfatal
The content of multiple-corr-nonfatal file is as below.
AER
COR RCVR
HL 0 1 2 3
AER
UNCOR POISON_TLP
HL 4 5 6 7

Fixes: 27c1ce8bbed7 ("PCI/AER: Use kfifo for tracking events instead of reimplementing it")
Signed-off-by: Dongdong Liu <email address hidden>

[Steps to Reproduce]
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[Actual Results]

[Expected Results]

[Reproducibility]

[Additional information]
(Firmware version, kernel version, affected hardware, etc. if required):

[Resolution]

PCI/AER: Fix the uninitialized aer_fifo

[Ike Panhc (ikepanhc)]

Not yet in mainline kernel.

ikepanhc@Kira:~/Canonical/sandbox$ git reset --hard origin/master
HEAD is now at 359c92c02bfa Merge tag 'dax-fixes-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
ikepanhc@Kira:~/Canonical/sandbox$ gitoneline | grep 'Fix the uninitialized aer_fifo'
ikepanhc@Kira:~/Canonical/sandbox$

[Ike Panhc (ikepanhc)]

$ gitoneline | grep aer_fifo
d95f20c4f070 <email address hidden> 2020-01-23 16:40:03 -0600 PCI/AER: Initialize aer_fifo

Patch has been merged into mainline kernel in 5.6 merge window

[Ike Panhc (ikepanhc)]

This patch fixes Fixes: 27c1ce8bbed7 ("PCI/AER: Use kfifo for tracking events instead of reimplementing it") which is introduced into mainline kernel since 5.0, so no need for 4.15 kernel.

[Ike Panhc (ikepanhc)]

In focal kernel since 5.4.0-15.18