This is a note to let you know that I've just added the patch titled
pinctrl: renesas: checker: Fix miscalculation of number of states
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-renesas-checker-fix-miscalculation-of-number.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f139d1375b0ef96cc73f2b08250a2cb08d0e930c
Author: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Date: Mon Feb 21 17:21:58 2022 +0100
pinctrl: renesas: checker: Fix miscalculation of number of states
[ 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@xxxxxxxxx>
Link: https://lore.kernel.org/r/6d8a6a05564f38f9d20464c1c17f96e52740cf6a.1645460429.git.geert+renesas@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pinctrl/renesas/core.c b/drivers/pinctrl/renesas/core.c
index f29130957e49..bc17f3131de5 100644
--- a/drivers/pinctrl/renesas/core.c
+++ b/drivers/pinctrl/renesas/core.c
@@ -739,7 +739,7 @@ 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 = 0;
static unsigned int sh_pfc_warnings __initdata = 0;
@@ -851,7 +851,8 @@ static void __init sh_pfc_check_cfg_reg(const char *drvname,
sh_pfc_check_reg(drvname, cfg_reg->reg);
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;
}
