linux-kernel - [PATCH v2 2/2] mtd: rawnand: qcom: Fix broken reset in misc_cmd_type in exec

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Date: Mon, 25 Mar 2024 11:30:48 +0100
From: Christian Marangi <ansuelsmth@...il.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Md Sadre Alam <quic_mdalam@...cinc.com>,
	Sricharan Ramabadhran <quic_srichara@...cinc.com>,
	linux-mtd@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Christian Marangi <ansuelsmth@...il.com>,
	stable@...r.kernel.org
Subject: [PATCH v2 2/2] mtd: rawnand: qcom: Fix broken reset in misc_cmd_type in exec_op

misc_cmd_type in exec_op have multiple problems. With commit a82990c8a409
("mtd: rawnand: qcom: Add read/read_start ops in exec_op path") it was
reworked and generalized but actually dropped the handling of the
RESET_DEVICE command.

The rework itself was correct with supporting case where a single misc
command is handled, but became problematic by the addition of exiting
early if we didn't had an ERASE or an OP_PROGRAM_PAGE operation.

Add additional logic to handle the reset command and return early only
if we don't have handling for the requested command.

Fixes: a82990c8a409 ("mtd: rawnand: qcom: Add read/read_start ops in exec_op path")
Cc: stable@...r.kernel.org
Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
Changes v2:
- Add this patch

 drivers/mtd/nand/raw/qcom_nandc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index 19d76e345a49..b8cff9240b28 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -2815,7 +2815,7 @@ static int qcom_misc_cmd_type_exec(struct nand_chip *chip, const struct nand_sub
 			      host->cfg0_raw & ~(7 << CW_PER_PAGE));
 		nandc_set_reg(chip, NAND_DEV0_CFG1, host->cfg1_raw);
 		instrs = 3;
-	} else {
+	} else if (q_op.cmd_reg != OP_RESET_DEVICE) {
 		return 0;
 	}
 
-- 
2.43.0