!508 SCSI: SSSRAID: Fix the bug that system automatically reboot when issue a...

!508 SCSI: SSSRAID: Fix the bug that system automatically reboot when issue a 'pcie-linkdown' command

Merge Pull Request from: @steven-song3 
 

[steps to reproduce the bug]
1. Create classic RAID1 and RAID5
2. Issue read & write mixed I/O to the drive letters corresponding to
RAID1 and RAID5
3. In the process of reading and writing I/O,issue a 'pcie-linkdown'
command by a serial port
[Expected results]
The I/O rate is 0 temporarily, and after a period of time the IO is
interrupted, the system will not automatically restart, and the RAID
card will not be unhealthy after manual restart.
[Root cause]
'pcie-linkdown' will trigger I/O timeout and firmware hang dead, and driver
will try to access firmware when it dead, Multiple accesses cause this
bug.
[Solution]
Remove communication with firmware in I/O timeout process when firmware
hang dead. 
 
Link:https://gitee.com/openeuler/kernel/pulls/508

 

Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>