[PATCH v2 22/46] mtd: nandsim: Cleanup destroy handlers

[Daniel Walter]

From: Richard Weinberger <rich...@nod.at>

Make sure that we free stuff only after it has been
initialized.

Signed-off-by: Richard Weinberger <rich...@nod.at>
---
 drivers/mtd/nand/nandsim.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index bac3fde..816d795 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -770,6 +770,9 @@ static void ns_ram_destroy(struct nandsim *ns)
        struct ns_ram_data *data = ns->backend_data;
        int i;
 
+       if (!data)
+               return;
+
        for (i = 0; i < ns->geom.pgnum; i++) {
                if (data->pages[i].byte)
                        kmem_cache_free(data->nand_pages_slab,
@@ -784,15 +787,22 @@ static void ns_cachefile_destroy(struct nandsim *ns)
 {
        struct ns_cachefile_data *data = ns->backend_data;
 
+       if (!data)
+               return;
+
        kfree(data->file_buf);
        vfree(data->pages_written);
        filp_close(data->cfile, NULL);
+       kfree(data);
 }
 
 static void ns_file_destroy(struct nandsim *ns)
 {
        struct ns_file_data *data = ns->backend_data;
 
+       if (!data)
+               return;
+
        kfree(data->file_buf);
        fput(data->file);
        kfree(data);
-- 
2.8.3