linux-kernel - [PATCH v2] mtd: rawnand: rockchip: ensure NVDDR timings are rejected

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Message-ID: <20240519031409.26464-1-val@packett.cool>
Date: Sun, 19 May 2024 00:13:39 -0300
From: Val Packett <val@...kett.cool>
To: 
Cc: Val Packett <val@...kett.cool>,
	stable@...r.kernel.org,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Heiko Stuebner <heiko@...ech.de>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-mtd@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] mtd: rawnand: rockchip: ensure NVDDR timings are rejected

setup_interface first gets called with a "target" value of
NAND_DATA_IFACE_CHECK_ONLY, in which case an error is expected
if the controller driver does not support the timing mode (NVDDR).

Fixes: a9ecc8c814e9 ("mtd: rawnand: Choose the best timings, NV-DDR included")
Signed-off-by: Val Packett <val@...kett.cool>
Cc: stable@...r.kernel.org
---
 drivers/mtd/nand/raw/rockchip-nand-controller.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/raw/rockchip-nand-controller.c b/drivers/mtd/nand/raw/rockchip-nand-controller.c
index 7baaef69d..555804476 100644
--- a/drivers/mtd/nand/raw/rockchip-nand-controller.c
+++ b/drivers/mtd/nand/raw/rockchip-nand-controller.c
@@ -420,13 +420,13 @@ static int rk_nfc_setup_interface(struct nand_chip *chip, int target,
 	u32 rate, tc2rw, trwpw, trw2c;
 	u32 temp;
 
-	if (target < 0)
-		return 0;
-
 	timings = nand_get_sdr_timings(conf);
 	if (IS_ERR(timings))
 		return -EOPNOTSUPP;
 
+	if (target < 0)
+		return 0;
+
 	if (IS_ERR(nfc->nfc_clk))
 		rate = clk_get_rate(nfc->ahb_clk);
 	else
-- 
2.45.0