[PATCH v2 1/1] usb: f_mass_storage: Bump local buffer size in fsg_common_create_luns()

[Andy Shevchenko]

GCC (Debian 14.2.0-19) is not happy about the buffer size:

drivers/usb/gadget/function/f_mass_storage.c:2970:48: error: ‘%d’ directive output may be truncated writing between 1 and 9 bytes into a region of size 5 [-Werror=format-truncation=]

Bump the size to get it enough for all possible values.

Note, although cfg->nluns is limited to FSG_MAX_LUNS (16), the compiler doesn't
realize this and complains about the buffer size.

Also note, the existing comment is wrong as size 8 for the whole buffer doesn't
cover 100 mil numbers, hence drop it altogether.

Fixes: b27c08c953e9 ("usb: gadget: f_mass_storage: create lun creation helpers for use in fsg_common_init")
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
v2: elaborated chosen approach in the commit message (Alan), added tag (Alan)
 drivers/usb/gadget/function/f_mass_storage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index b7b06cb79ff5..3d1823b74cd3 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -2961,7 +2961,7 @@ EXPORT_SYMBOL_GPL(fsg_common_create_lun);
 
 int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg)
 {
-	char buf[8]; /* enough for 100000000 different numbers, decimal */
+	char buf[14];
 	int i, rc;
 
 	fsg_common_remove_luns(common);
-- 
2.50.1