[PATCH 5.16 0661/1017] pinctrl: renesas: checker: Fix miscalculation of number of states

Greg Kroah-Hartman
2022-04-05T10:04:20Z

From: Geert Uytterhoeven <geert+renesas@glider.be>

[ Upstream commit de9b861018d46af27a5edff8b6baef35c0c0ad4f ]

The checker failed to validate all enum IDs in the description of a
register with fixed-width register fields, due to a miscalculation of
the number of described states: each register field of n bits can have
"1 << n" possible states, not "1".

Increase SH_PFC_MAX_ENUMS accordingly, now more enum IDs are checked
(SH-Mobile AG5 has more than 4000 enum IDs defined).

Fixes: 12d057bad683b1c6 ("pinctrl: sh-pfc: checker: Add check for enum ID conflicts")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/6d8a6a05564f38f9d20464c1c17f96e52740cf6a.1645460429.git.geert+renesas@glider.be
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pinctrl/renesas/core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/renesas/core.c b/drivers/pinctrl/renesas/core.c
index 0d4ea2e22a53..12d41ac017b5 100644
--- a/drivers/pinctrl/renesas/core.c
+++ b/drivers/pinctrl/renesas/core.c
@@ -741,7 +741,7 @@ static int sh_pfc_suspend_init(struct sh_pfc *pfc) { return 0; }

#ifdef DEBUG
#define SH_PFC_MAX_REGS 300
-#define SH_PFC_MAX_ENUMS 3000
+#define SH_PFC_MAX_ENUMS 5000

static unsigned int sh_pfc_errors __initdata;
static unsigned int sh_pfc_warnings __initdata;
@@ -865,7 +865,8 @@ static void __init sh_pfc_check_cfg_reg(const char *drvname,
GENMASK(cfg_reg->reg_width - 1, 0));

if (cfg_reg->field_width) {
- n = cfg_reg->reg_width / cfg_reg->field_width;
+ fw = cfg_reg->field_width;
+ n = (cfg_reg->reg_width / fw) << fw;
/* Skip field checks (done at build time) */
goto check_enum_ids;
}
--
2.34.1