mtd: Initialize all parameters of mtd_oob_ops

Most of the time the ooboffs parameter of the mtd_oob_ops structure
was initialized only when needed. Since the introduction of the
SPI-NAND subsystem, this parameter is transferred into
nand_page_io_req structure automatically and may be used by any
SPI-NAND user.

Before this happens, initialize all the structure parameters when they
are created in mtdchar.c.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/mtd/mtdchar.c

@@ -174,7 +174,7 @@ static ssize_t mtdchar_read(struct file *file, char __user *buf, size_t count,
 			break;
 		case MTD_FILE_MODE_RAW:
 		{
-			struct mtd_oob_ops ops;
+			struct mtd_oob_ops ops = {};
 
 			ops.mode = MTD_OPS_RAW;
 			ops.datbuf = kbuf;
@@ -268,7 +268,7 @@ static ssize_t mtdchar_write(struct file *file, const char __user *buf, size_t c
 
 		case MTD_FILE_MODE_RAW:
 		{
-			struct mtd_oob_ops ops;
+			struct mtd_oob_ops ops = {};
 
 			ops.mode = MTD_OPS_RAW;
 			ops.datbuf = kbuf;
@@ -350,7 +350,7 @@ static int mtdchar_writeoob(struct file *file, struct mtd_info *mtd,
 	uint32_t __user *retp)
 {
 	struct mtd_file_info *mfi = file->private_data;
-	struct mtd_oob_ops ops;
+	struct mtd_oob_ops ops = {};
 	uint32_t retlen;
 	int ret = 0;
 
@@ -394,7 +394,7 @@ static int mtdchar_readoob(struct file *file, struct mtd_info *mtd,
 	uint32_t __user *retp)
 {
 	struct mtd_file_info *mfi = file->private_data;
-	struct mtd_oob_ops ops;
+	struct mtd_oob_ops ops = {};
 	int ret = 0;
 
 	if (length > 4096)
@@ -587,7 +587,7 @@ static int mtdchar_write_ioctl(struct mtd_info *mtd,
 		struct mtd_write_req __user *argp)
 {
 	struct mtd_write_req req;
-	struct mtd_oob_ops ops;
+	struct mtd_oob_ops ops = {};
 	const void __user *usr_data, *usr_oob;
 	int ret;