linux-kernel - [PATCH 5.10 002/199] mtd: rawnand: gpmi: fix dst bit offset when extracting raw payload

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Message-Id: <20210125183216.354355440@linuxfoundation.org>
Date:   Mon, 25 Jan 2021 19:37:04 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Martin Hundebøll <martin@...nix.com>,
        Sean Nyekjaer <sean@...nix.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 5.10 002/199] mtd: rawnand: gpmi: fix dst bit offset when extracting raw payload

From: Sean Nyekjaer <sean@...nix.com>

commit 4883a60c17eda6bf52d1c817ee7ead65b4a02da2 upstream.

Re-add the multiply by 8 to "step * eccsize" to correct the destination bit offset
when extracting the data payload in gpmi_ecc_read_page_raw().

Fixes: e5e5631cc889 ("mtd: rawnand: gpmi: Use nand_extract_bits()")
Cc: stable@...r.kernel.org
Reported-by: Martin Hundebøll <martin@...nix.com>
Signed-off-by: Sean Nyekjaer <sean@...nix.com>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Link: https://lore.kernel.org/linux-mtd/20201221100013.2715675-1-sean@geanix.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -1613,7 +1613,7 @@ static int gpmi_ecc_read_page_raw(struct
 	/* Extract interleaved payload data and ECC bits */
 	for (step = 0; step < nfc_geo->ecc_chunk_count; step++) {
 		if (buf)
-			nand_extract_bits(buf, step * eccsize, tmp_buf,
+			nand_extract_bits(buf, step * eccsize * 8, tmp_buf,
 					  src_bit_off, eccsize * 8);
 		src_bit_off += eccsize * 8;