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| author | Matthew R. Ochs <mrochs@linux.vnet.ibm.com> | 2017-04-12 14:14:05 -0500 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-04-13 22:55:41 -0400 |
| commit | 8fa4f1770d56af6f0a5a862f1fd298a4eeea94f3 (patch) | |
| tree | d3d4bff0c8c1f1836861000f0a4ccc4a1025cd3e /Documentation/powerpc | |
| parent | 78ae028e823701148e4915759459ee79597ea8ec (diff) | |
| download | lwn-8fa4f1770d56af6f0a5a862f1fd298a4eeea94f3.tar.gz lwn-8fa4f1770d56af6f0a5a862f1fd298a4eeea94f3.zip | |
scsi: cxlflash: Remove port configuration assumptions
At present, the cxlflash driver only supports hardware with two FC ports. The
code was initially designed with this assumption and is dependent on having
two FC ports - adding more ports will break logic within the driver.
To mitigate this issue, remove the existing port assumptions and transition
the code to support more than two ports. As a side effect, clarify the
interpretation of the DK_CXLFLASH_ALL_PORTS_ACTIVE flag.
Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/cxlflash.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/powerpc/cxlflash.txt b/Documentation/powerpc/cxlflash.txt index 6d9a2ed32cad..66b4496d6619 100644 --- a/Documentation/powerpc/cxlflash.txt +++ b/Documentation/powerpc/cxlflash.txt @@ -239,6 +239,11 @@ DK_CXLFLASH_USER_VIRTUAL resource handle that is provided is already referencing provisioned storage. This is reflected by the last LBA being a non-zero value. + When a LUN is accessible from more than one port, this ioctl will + return with the DK_CXLFLASH_ALL_PORTS_ACTIVE return flag set. This + provides the user with a hint that I/O can be retried in the event + of an I/O error as the LUN can be reached over multiple paths. + DK_CXLFLASH_VLUN_RESIZE ----------------------- This ioctl is responsible for resizing a previously created virtual |