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regmap: use krealloc_array() in regmap_register_patch()

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Replace krealloc() with krealloc_array() in regmap_register_patch() to
gain the built-in overflow check on the element-count * element-size
multiplication, and switch to the early-return error style to reduce
nesting.

Assisted-by: LLM
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://patch.msgid.link/20261002-regmap-lock-2nd-v2-4-e172b0501c52@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peng Fan 2026-10-02 21:11:20 +08:00 committed by Mark Brown
parent 4e1b5ccf1e
commit 8a889c83e4
1 changed files with 6 additions and 9 deletions
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15
drivers/base/regmap/regmap.c
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@ -3379,16 +3379,13 @@ int regmap_register_patch(struct regmap *map, const struct reg_sequence *regs,
num_regs))
return 0;
p = krealloc(map->patch,
sizeof(struct reg_sequence) * (map->patch_regs + num_regs),
GFP_KERNEL);
if (p) {
memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs));
map->patch = p;
map->patch_regs += num_regs;
} else {
p = krealloc_array(map->patch, map->patch_regs + num_regs, sizeof(*p), GFP_KERNEL);
if (!p)
return -ENOMEM;
}
memcpy(p + map->patch_regs, regs, num_regs * sizeof(*regs));
map->patch = p;
map->patch_regs += num_regs;
scoped_guard(regmap, map) {
bypass = map->cache_bypass;