scsi: cxlflash: Introduce OCXL context state machine

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In order to protect the OCXL hardware contexts from getting clobbered, a
simple state machine is added to indicate when a context is in open, close or
start state. The expected states are validated throughout the code to prevent
illegal operations on a context. A mutex is added to protect writes to the
context state field.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Uma Krishnan 2018-03-26 11:35:00 -05:00 • committed by Martin K. Petersen

parent d91dd3a7d1

commit f81face725

2 changed files with 64 additions and 3 deletions

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59

drivers/scsi/cxlflash/ocxl_hw.c

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8

drivers/scsi/cxlflash/ocxl_hw.h

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