[SCSI] libiscsi, iscsi_tcp: iscsi pool cleanup

iscsi_pool_init simplified

iscsi_pool_init currently has a lot of duplicate kfree() calls it does
when some allocation fails. This patch simplifies the code a little by
using iscsi_pool_free to tear down the pool in case of an error.

iscsi_pool_init also returns a copy of the item array to the caller.
Not all callers use this array, so we make it optional.

Instead of allocating a second array and return that, allocate just one
array, of twice the size.

Update users of iscsi_pool_{init,free}

This patch drops the (now useless) second argument to
iscsi_pool_free, and updates all callers.

It also removes the ctask->r2ts array, which was never
used anyway. Since the items argument to iscsi_pool_init
is now optional, we can pass NULL instead.

Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
index eb3784f949fd..d49d87611e82 100644
--- a/drivers/scsi/iscsi_tcp.h
+++ b/drivers/scsi/iscsi_tcp.h
@@ -175,9 +175,8 @@ struct iscsi_tcp_cmd_task {
         uint32_t                exp_datasn;             /* expected target's R2TSN/DataSN */
         int                     data_offset;
         struct iscsi_r2t_info   *r2t;                   /* in progress R2T    */
-        struct iscsi_queue      r2tpool;
+        struct iscsi_pool       r2tpool;
         struct kfifo            *r2tqueue;
-        struct iscsi_r2t_info   **r2ts;
         int                     digest_count;
         uint32_t                immdigest;              /* for imm data */
         struct iscsi_buf        immbuf;                 /* for imm data digest */