Eric Lee / smarc-ti-linux-kernel

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Commit 89c12cc925a7d0982dc53b743a42108acc76aef4

Authored by Nicholas Bellinger
Committed by Nicholas Bellinger
1 parent d9ea32bff2
Exists in master and in 20 other branches dlt-processor-sdk-linux-03.00.00.04, newt-ti-linux-3.12.y, processor-sdk-linux-01.00.00, processor-sdk-linux-02.00.01, smarc-ti-linux-3.12.10, smarc-ti-linux-3.12.y, smarc-ti-linux-3.14.y, smarc-ti-linux-3.15.y, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04, ti-linux-3.12.y, ti-linux-3.14.y, ti-linux-3.15.y, ti-lsk-linux-4.1.y

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>

Showing 1 changed file with 3 additions and 0 deletions Side-by-side Diff

drivers/target/target_core_alua.c
Diff comments   View file @ 89c12cc
... ... @@ -557,6 +557,9 @@
557 557 * a ALUA logical unit group.
558 558 */
559 559 tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem;
  560 + if (!tg_pt_gp_mem)
  561 + return 0;
  562 +
560 563 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
561 564 tg_pt_gp = tg_pt_gp_mem->tg_pt_gp;
562 565 out_alua_state = atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state);