Revert "fs: fat: cannot write to subdirectories"

This reverts commit 0dc1bfb730.
The succeeding patch series will supersede it.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

fs/fat/fat_write.c

@@ -909,11 +909,9 @@ static int do_fat_write(const char *filename, void *buffer, loff_t size,
 	volume_info volinfo;
 	fsdata datablock;
 	fsdata *mydata = &datablock;
-	int cursect, i;
+	int cursect;
 	int ret = -1, name_len;
 	char l_filename[VFAT_MAXLEN_BYTES];
-	char bad[2] = " ";
-	const char illegal[] = "<>:\"/\\|?*";
 
 	*actwrite = size;
 	dir_curclust = 0;
@@ -973,18 +971,6 @@ static int do_fat_write(const char *filename, void *buffer, loff_t size,
 	}
 	dentptr = (dir_entry *) do_fat_read_at_block;
 
-	/* Strip leading (back-)slashes */
-	while ISDIRDELIM(*filename)
-		++filename;
-	/* Check that the filename is valid */
-	for (i = 0; i < strlen(illegal); ++i) {
-		*bad = illegal[i];
-		if (strstr(filename, bad)) {
-			printf("FAT: illegal filename (%s)\n", filename);
-			return -1;
-		}
-	}
-
 	name_len = strlen(filename);
 	if (name_len >= VFAT_MAXLEN_BYTES)
 		name_len = VFAT_MAXLEN_BYTES - 1;