Hi Vinay,

This is Michael from Marvell. This bug was brought to our attention and
we would like to help resolve this issue.

We analyzed the logs attached to this bug and below is our analysis :

err_warn_bitmap=00000000:00400000 - 22 BIT  means 
FCOE_ERROR_CODE_FCP_RSP_INVALID_PAYLOAD_SIZE
00000040:00000000 - BIT 38 set - means FCOE_ERROR_CODE_COMMON_INCORRECT_SEQ_CNT
 
So it appears that there is something wrong with either the target or the 
fabric as the firmware is reporting invalid payload size and sequence count 
errors.

To debug the issue further we would need a wire trace between the IOM
and the target. Also TCP dump on the adapter ports of the system along
with driver logs again. It will also be helpful if you can enable driver
debug.

Steps to enable driver debug:
Load the driver with following parameters
  modprobe -v qedf debug=1

Thanks,
Michael.

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https://bugs.launchpad.net/bugs/1950778

Title:
  Ubuntu 20.04.3 generates IO error message during FIO stress.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  With fio stress on Powerstore fcoe drives (lun) attached by using
  Qlogic QL41000 series controller, ubuntu 20.04.3 on MX740c blade
  server generates below mentioned i/o errors.

  Nov 11 20:25:17 e2e-l10-058234 kernel: 
[0000:3b:00.3]:[qedf_process_error_detect:1523]:13: Error detection CQE, 
xid=0x7bd
  Nov 11 20:25:17 e2e-l10-058234 kernel: 
[0000:3b:00.3]:[qedf_process_error_detect:1525]:13: 
err_warn_bitmap=00000040:00000000
  Nov 11 20:25:17 e2e-l10-058234 kernel: 
[0000:3b:00.3]:[qedf_process_error_detect:1529]:13: tx_buff_off=00000000, 
rx_buff_off=00000000, rx_id=041b
  Nov 11 20:25:19 e2e-l10-058234 kernel: 
[0000:3b:00.2]:[qedf_process_error_detect:1523]:3: Error detection CQE, 
xid=0x34d
  Nov 11 20:25:19 e2e-l10-058234 kernel: 
[0000:3b:00.2]:[qedf_process_error_detect:1525]:3: 
err_warn_bitmap=00000040:00000000
  Nov 11 20:25:19 e2e-l10-058234 kernel: 
[0000:3b:00.2]:[qedf_process_error_detect:1529]:3: tx_buff_off=00000000, 
rx_buff_off=00000000, rx_id=01f7

  Steps to reproduce.
  1. Configure QL41000 series controller on MX MX740c blade server.
  2. Configure APM3246 array directly connected to chassis module MX9116n.  
  3. Install Ubuntu 20.04.3 in any local drive.
  4. start I/O by using fio : # fio FileSystemCreateSingle/fio_test.cfg
  then we can observe error message in syslog

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