kfree(NULL) is safe, so removes NULL check before freeing the mem.
This patch also fix the ifnullfree.cocci warnings.

Signed-off-by: Wen Yang <[email protected]>
CC: Alex Deucher <[email protected]>
CC: Hannes Reinecke <[email protected]>
CC: "James E.J. Bottomley" <[email protected]>
CC: "Martin K. Petersen" <[email protected]>
CC: [email protected]
CC: [email protected]
---
 drivers/scsi/aic7xxx/aic79xx_core.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c 
b/drivers/scsi/aic7xxx/aic79xx_core.c
index 9ee75c9a9aa1..090440f2ebed 100644
--- a/drivers/scsi/aic7xxx/aic79xx_core.c
+++ b/drivers/scsi/aic7xxx/aic79xx_core.c
@@ -3673,8 +3673,7 @@ ahd_free_tstate(struct ahd_softc *ahd, u_int scsi_id, 
char channel, int force)
                return;
 
        tstate = ahd->enabled_targets[scsi_id];
-       if (tstate != NULL)
-               kfree(tstate);
+       kfree(tstate);
        ahd->enabled_targets[scsi_id] = NULL;
 }
 #endif
@@ -6136,8 +6135,7 @@ ahd_set_unit(struct ahd_softc *ahd, int unit)
 void
 ahd_set_name(struct ahd_softc *ahd, char *name)
 {
-       if (ahd->name != NULL)
-               kfree(ahd->name);
+       kfree(ahd->name);
        ahd->name = name;
 }
 
@@ -6198,12 +6196,9 @@ ahd_free(struct ahd_softc *ahd)
                kfree(ahd->black_hole);
        }
 #endif
-       if (ahd->name != NULL)
-               kfree(ahd->name);
-       if (ahd->seep_config != NULL)
-               kfree(ahd->seep_config);
-       if (ahd->saved_stack != NULL)
-               kfree(ahd->saved_stack);
+       kfree(ahd->name);
+       kfree(ahd->seep_config);
+       kfree(ahd->saved_stack);
 #ifndef __FreeBSD__
        kfree(ahd);
 #endif
-- 
2.19.1

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