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mtd: Use kasprintf() instead of fixed buffer formatting

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Using "%4.4X" in the calculation of the buffer size is misleading, as
the format string literal has no relation to the actual size needed.
Hence this is fragile w.r.t. future modification.

As this is not a hot path, fix this by replacing the formatting in a
fixed buffer by kasprintf().

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Geert Uytterhoeven 2018-06-28 10:20:11 +02:00 committed by Boris Brezillon
parent 98534a58c8
commit 4836024616
1 changed files with 5 additions and 2 deletions
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7
drivers/mtd/chips/gen_probe.c
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@ -202,16 +202,19 @@ static inline struct mtd_info *cfi_cmdset_unknown(struct map_info *map,
struct cfi_private *cfi = map->fldrv_priv;
__u16 type = primary?cfi->cfiq->P_ID:cfi->cfiq->A_ID;
#ifdef CONFIG_MODULES
char probename[sizeof("cfi_cmdset_%4.4X")];
cfi_cmdset_fn_t *probe_function;
char *probename;
sprintf(probename, "cfi_cmdset_%4.4X", type);
probename = kasprintf(GFP_KERNEL, "cfi_cmdset_%4.4X", type);
if (!probename)
return NULL;
probe_function = __symbol_get(probename);
if (!probe_function) {
request_module("cfi_cmdset_%4.4X", type);
probe_function = __symbol_get(probename);
}
kfree(probename);
if (probe_function) {
struct mtd_info *mtd;