[PATCH 3/4] mpt3sas: fix possible memory leak in mpt3sas_send_trigger_data_event

[Joe Lawrence]

If mpt3sas_send_trigger_data_event exits early without inserting a
fw_event, be sure to undo any prior allocations.

This fixes the following smatch warning:

  drivers/scsi/mpt3sas/mpt3sas_scsih.c:2522
    mpt3sas_send_trigger_data_event() warn: possible memory leak of
    'fw_event'

Signed-off-by: Joe Lawrence <joe.lawre...@stratus.com>
Cc: Dan Carpenter <dan.carpen...@oracle.com>
Cc: Sreekanth Reddy <sreekanth.re...@lsi.com>
---
 drivers/scsi/mpt3sas/mpt3sas_scsih.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c 
b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index e6f0720..25e3a22 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -2520,8 +2520,10 @@ mpt3sas_send_trigger_data_event(struct MPT3SAS_ADAPTER 
*ioc,
        if (!fw_event)
                return;
        fw_event->event_data = kzalloc(sizeof(*event_data), GFP_ATOMIC);
-       if (!fw_event->event_data)
+       if (!fw_event->event_data) {
+               kfree(fw_event);
                return;
+       }
        fw_event->event = MPT3SAS_PROCESS_TRIGGER_DIAG;
        fw_event->ioc = ioc;
        memcpy(fw_event->event_data, event_data, sizeof(*event_data));
-- 
1.7.10.4

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