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mtd: slram: insert break after errors in parsing the map

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GCC 12.3.0 compiler on linux-next next-20240709 tree found the execution
path in which, due to lazy evaluation, devlength isn't initialised with the
parsed string:

   289		while (map) {
   290			devname = devstart = devlength = NULL;
   291
   292			if (!(devname = strsep(&map, ","))) {
   293				E("slram: No devicename specified.\n");
   294				break;
   295			}
   296			T("slram: devname = %s\n", devname);
   297			if ((!map) || (!(devstart = strsep(&map, ",")))) {
   298				E("slram: No devicestart specified.\n");
   299			}
   300			T("slram: devstart = %s\n", devstart);
 → 301			if ((!map) || (!(devlength = strsep(&map, ",")))) {
   302				E("slram: No devicelength / -end specified.\n");
   303			}
 → 304			T("slram: devlength = %s\n", devlength);
   305			if (parse_cmdline(devname, devstart, devlength) != 0) {
   306				return(-EINVAL);
   307			}

Parsing should be finished after map == NULL, so a break is best inserted after
each E("slram: ... \n") error message.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Mirsad Todorovac <mtodorovac69@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20240711234319.637824-1-mtodorovac69@gmail.com
This commit is contained in:
Mirsad Todorovac 2024-07-12 01:43:20 +02:00 committed by Miquel Raynal
parent 8400291e28
commit 336c218dd7
1 changed files with 2 additions and 0 deletions
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2
drivers/mtd/devices/slram.c
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@ -296,10 +296,12 @@ static int __init init_slram(void)
T("slram: devname = %s\n", devname);
if ((!map) || (!(devstart = strsep(&map, ",")))) {
E("slram: No devicestart specified.\n");
break;
}
T("slram: devstart = %s\n", devstart);
if ((!map) || (!(devlength = strsep(&map, ",")))) {
E("slram: No devicelength / -end specified.\n");
break;
}
T("slram: devlength = %s\n", devlength);
if (parse_cmdline(devname, devstart, devlength) != 0) {