fpga: Replace char * with const char * for filename

Ensure the string for filename is always constant, otherwise it can be
corrupted by the writing.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

2 files changed, 3 insertions, 2 deletions

diff --git a/drivers/fpga/zynqpl.c b/drivers/fpga/zynqpl.c
index 499310d0c0..683cf14b47 100644
--- a/drivers/fpga/zynqpl.c
+++ b/drivers/fpga/zynqpl.c
@@ -421,7 +421,8 @@ static int zynq_loadfs(xilinx_desc *desc, const void *buf, size_t bsize,
 	loff_t blocksize, actread;
 	loff_t pos = 0;
 	int fstype;
-	char *interface, *dev_part, *filename;
+	char *interface, *dev_part;
+	const char *filename;
 
 	blocksize = fsinfo->blocksize;
 	interface = fsinfo->interface;
diff --git a/include/fpga.h b/include/fpga.h
index 195f0bdd57..51de5c55f8 100644
--- a/include/fpga.h
+++ b/include/fpga.h
@@ -41,7 +41,7 @@ typedef struct {                /* typedef fpga_desc */
 	unsigned int blocksize;
 	char *interface;
 	char *dev_part;
-	char *filename;
+	const char *filename;
 	int fstype;
 } fpga_fs_info;