From c2c292f45029a6850cd14c7c2fa4fc479b8f74aa Mon Sep 17 00:00:00 2001 From: Uma Krishnan Date: Wed, 21 Jun 2017 21:14:30 -0500 Subject: 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 Acked-by: Matthew R. Ochs Signed-off-by: Martin K. Petersen --- Documentation/powerpc/cxlflash.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'Documentation/powerpc') 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 -- cgit v1.2.3-55-g7522