4.4-stable review patch. If anyone has any objections, please let me know.
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From: Jim Gill jgill@vmware.com
[ Upstream commit e95153b64d03c2b6e8d62e51bdcc33fcad6e0856 ]
Commands that are reset are returned with status SAM_STAT_COMMAND_TERMINATED. PVSCSI currently returns DID_OK | SAM_STAT_COMMAND_TERMINATED which fails the command. Instead, set hostbyte to DID_RESET to allow upper layers to retry.
Tested by copying a large file between two pvscsi disks on same adapter while performing a bus reset at 1-second intervals. Before fix, commands sometimes fail with DID_OK. After fix, commands observed to fail with DID_RESET.
Signed-off-by: Jim Gill jgill@vmware.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/scsi/vmw_pvscsi.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
--- a/drivers/scsi/vmw_pvscsi.c +++ b/drivers/scsi/vmw_pvscsi.c @@ -545,9 +545,14 @@ static void pvscsi_complete_request(stru (btstat == BTSTAT_SUCCESS || btstat == BTSTAT_LINKED_COMMAND_COMPLETED || btstat == BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG)) { - cmd->result = (DID_OK << 16) | sdstat; - if (sdstat == SAM_STAT_CHECK_CONDITION && cmd->sense_buffer) - cmd->result |= (DRIVER_SENSE << 24); + if (sdstat == SAM_STAT_COMMAND_TERMINATED) { + cmd->result = (DID_RESET << 16); + } else { + cmd->result = (DID_OK << 16) | sdstat; + if (sdstat == SAM_STAT_CHECK_CONDITION && + cmd->sense_buffer) + cmd->result |= (DRIVER_SENSE << 24); + } } else switch (btstat) { case BTSTAT_SUCCESS: