mtd: diskonchip: mem resource name is not optional

commit 86e4bbc766b9456f583f2fc3c4f6c623b422af88 upstream.

Passing a name to request_mem_region() isn't optional and can't just
be NULL. Passing NULL causes a NULL ptr deref later in the boot
process.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Tested-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
index fec31d7..fe8a020 100644 (file)
--- a/drivers/mtd/nand/diskonchip.c
+++ b/drivers/mtd/nand/diskonchip.c
@@ -1438,7 +1438,7 @@ static int __init doc_probe(unsigned long physadr)
        int reg, len, numchips;
        int ret = 0;
 
-       if (!request_mem_region(physadr, DOC_IOREMAP_LEN, NULL))
+       if (!request_mem_region(physadr, DOC_IOREMAP_LEN, "DiskOnChip"))
                return -EBUSY;
        virtadr = ioremap(physadr, DOC_IOREMAP_LEN);
        if (!virtadr) {