3.16.7-ckt8 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Lee Duncan <[email protected]> commit 1ecc7586922662e3ca2f3f0c3f17fec8749fc621 upstream. For PGR reservation of type Write Exclusive Access, allow all non reservation holding I_T nexuses with active registrations to READ from the device. This addresses a bug where active registrations that attempted to READ would result in an reservation conflict. Signed-off-by: Lee Duncan <[email protected]> Signed-off-by: Nicholas Bellinger <[email protected]> Signed-off-by: Luis Henriques <[email protected]> --- drivers/target/target_core_pr.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index fde735eeea57..ec155de017f4 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -528,6 +528,18 @@ static int core_scsi3_pr_seq_non_holder( return 0; } + } else if (we && registered_nexus) { + /* + * Reads are allowed for Write Exclusive locks + * from all registrants. + */ + if (cmd->data_direction == DMA_FROM_DEVICE) { + pr_debug("Allowing READ CDB: 0x%02x for %s" + " reservation\n", cdb[0], + core_scsi3_pr_dump_type(pr_reg_type)); + + return 0; + } } pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x" " for %s reservation\n", transport_dump_cmd_direction(cmd), -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
