From: Nicholas Bellinger <nab@xxxxxxxxxxxxx> This patch adds an check for a non-existent port->sep_alua_tg_pt_gp_mem within target_alua_state_check(), which is not present for internally dispatched EXTENDED_COPY WRITE I/O to the destination target port. Cc: Christoph Hellwig <hch@xxxxxx> Cc: Hannes Reinecke <hare@xxxxxxx> Cc: Martin Petersen <martin.petersen@xxxxxxxxxx> Cc: Chris Mason <chris.mason@xxxxxxxxxxxx> Cc: Roland Dreier <roland@xxxxxxxxxxxxxxx> Cc: Zach Brown <zab@xxxxxxxxxx> Cc: James Bottomley <JBottomley@xxxxxxxxxxxxx> Cc: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxx> --- drivers/target/target_core_alua.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c index 5403186..ea928c4 100644 --- a/drivers/target/target_core_alua.c +++ b/drivers/target/target_core_alua.c @@ -557,6 +557,9 @@ target_alua_state_check(struct se_cmd *cmd) * a ALUA logical unit group. */ tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; + if (!tg_pt_gp_mem) + return 0; + spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state); -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
