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| author | Uma Krishnan <ukrishn@linux.vnet.ibm.com> | 2017-06-22 05:14:30 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-06-26 22:01:08 +0300 |
| commit | c2c292f45029a6850cd14c7c2fa4fc479b8f74aa (patch) | |
| tree | e73b1f0e026dd547e426aa1f4019c5895ad85ade /Documentation/powerpc | |
| parent | 0b09e711189952ff9d411593a8d74ec12a956c57 (diff) | |
| download | linux-c2c292f45029a6850cd14c7c2fa4fc479b8f74aa.tar.xz | |
scsi: cxlflash: Handle AFU sync failures
AFU sync operations are not currently evaluated for failure. This is
acceptable for paths where there is not a dependency on the AFU being
consistent with the host. Examples include link reset events and LUN
cleanup operations. On paths where there is a dependency, such as a LUN
open, a sync failure should be acted upon.
In the event of AFU sync failures, either log or cleanup as appropriate for
operations that are dependent on a successful sync completion.
Update documentation to reflect behavior in the event of an AFU sync
failure.
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>
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/cxlflash.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/powerpc/cxlflash.txt b/Documentation/powerpc/cxlflash.txt index 66b4496d6619..f9036cb0170d 100644 --- a/Documentation/powerpc/cxlflash.txt +++ b/Documentation/powerpc/cxlflash.txt @@ -257,6 +257,12 @@ DK_CXLFLASH_VLUN_RESIZE operating in the virtual mode and used to program a LUN translation table that the AFU references when provided with a resource handle. + This ioctl can return -EAGAIN if an AFU sync operation takes too long. + In addition to returning a failure to user, cxlflash will also schedule + an asynchronous AFU reset. Should the user choose to retry the operation, + it is expected to succeed. If this ioctl fails with -EAGAIN, the user + can either retry the operation or treat it as a failure. + DK_CXLFLASH_RELEASE ------------------- This ioctl is responsible for releasing a previously obtained @@ -309,6 +315,12 @@ DK_CXLFLASH_VLUN_CLONE clone. This is to avoid a stale entry in the file descriptor table of the child process. + This ioctl can return -EAGAIN if an AFU sync operation takes too long. + In addition to returning a failure to user, cxlflash will also schedule + an asynchronous AFU reset. Should the user choose to retry the operation, + it is expected to succeed. If this ioctl fails with -EAGAIN, the user + can either retry the operation or treat it as a failure. + DK_CXLFLASH_VERIFY ------------------ This ioctl is used to detect various changes such as the capacity of |