Messages in this thread Patch in this message | | | From | "Nicholas A. Bellinger" <> | Subject | [PATCH 5/9] target: Avoid non-existent tg_pt_gp_mem in target_alua_state_check | Date | Fri, 23 Aug 2013 02:26:57 +0000 |
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From: Nicholas Bellinger <nab@daterainc.com>
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@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: Roland Dreier <roland@purestorage.com> Cc: Zach Brown <zab@redhat.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com> --- 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
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