scsi: mpt3sas: Add separate function for aero doorbell reads

Browse source

Sometimes Aero controllers appears to be returning bad data (0) for
doorbell register read and if retries are performed immediately after the
bad read, they return good data.

Workaround is added to retry read from doorbell registers for maximum three
times if driver get the zero.  Added functions base_readl_aero for Aero IOC
and base_readl for gen35 and other controllers.

Signed-off-by: Suganath Prabu <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

This commit is contained in:

Suganath Prabu 2018-12-07 12:58:33 +05:30 • committed by Martin K. Petersen

parent cc68e6077b

commit b899202901

2 changed files with 32 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

30

drivers/scsi/mpt3sas/mpt3sas_base.c

View file

2

drivers/scsi/mpt3sas/mpt3sas_base.h

View file