[PATCH] scsi: elx: efct: fix refcount leak in efct_hw_io_abort()

[WenTao Liang <vulab@iscas.ac.cn>]

When efct_hw_reqtag_alloc() fails in efct_hw_io_abort(), the error
path returns -ENOSPC without releasing the reference obtained via
kref_get_unless_zero() earlier in the function. All other error
paths correctly drop the reference. This causes a permanent
reference leak on the io_to_abort object.

Additionally, the abort_in_progress flag is left set to true on
this path, which means future abort attempts for the same I/O will
immediately return -EINPROGRESS even though the abort was never
submitted, effectively blocking recovery.

Fix this by adding the missing kref_put() call and reset
abort_in_progress to false, matching the cleanup done in the
efct_hw_wq_write() failure path below.

Cc: stable@vger.kernel.org
Fixes: 63de51327a64 ("scsi: elx: efct: Hardware I/O and SGL initialization")
Signed-off-by: WenTao Liang <vulab@iscas.ac.cn>
---
 drivers/scsi/elx/efct/efct_hw.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/elx/efct/efct_hw.c b/drivers/scsi/elx/efct/efct_hw.c
index 1838032f6486..b79c6a7ea791 100644
--- a/drivers/scsi/elx/efct/efct_hw.c
+++ b/drivers/scsi/elx/efct/efct_hw.c
@@ -1997,6 +1997,8 @@ efct_hw_io_abort(struct efct_hw *hw, struct efct_hw_io *io_to_abort,
 	wqcb = efct_hw_reqtag_alloc(hw, efct_hw_wq_process_abort, io_to_abort);
 	if (!wqcb) {
 		efc_log_err(hw->os, "can't allocate request tag\n");
+		io_to_abort->abort_in_progress = false;
+		kref_put(&io_to_abort->ref, io_to_abort->release);
 		return -ENOSPC;
 	}
 
-- 
2.50.1 (Apple Git-155)