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authorMatthew R. Ochs <mrochs@linux.vnet.ibm.com>2017-04-12 22:14:05 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2017-04-14 05:55:41 +0300
commit8fa4f1770d56af6f0a5a862f1fd298a4eeea94f3 (patch)
treed3d4bff0c8c1f1836861000f0a4ccc4a1025cd3e /Documentation/powerpc
parent78ae028e823701148e4915759459ee79597ea8ec (diff)
downloadlinux-8fa4f1770d56af6f0a5a862f1fd298a4eeea94f3.tar.xz
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.txt5
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