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| author | Nicholas Bellinger <nab@daterainc.com> | 2013-08-22 15:35:45 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-09-10 16:48:42 -0700 |
| commit | 89c12cc925a7d0982dc53b743a42108acc76aef4 (patch) | |
| tree | 8b923abc646a3ea8f14ab0e792ac68b20a1ce021 /drivers/target/target_core_alua.c | |
| parent | d9ea32bff2c55d4cd4654f1e98d269a758f34534 (diff) | |
| download | linux-89c12cc925a7d0982dc53b743a42108acc76aef4.tar.gz linux-89c12cc925a7d0982dc53b743a42108acc76aef4.tar.bz2 linux-89c12cc925a7d0982dc53b743a42108acc76aef4.zip | |
target: Avoid non-existent tg_pt_gp_mem in target_alua_state_check
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>
Diffstat (limited to 'drivers/target/target_core_alua.c')
| -rw-r--r-- | 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 5403186e4777..ea928c4d8854 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); |