From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4BDA215CAE for ; Tue, 8 Nov 2022 14:01:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BE54AC433D6; Tue, 8 Nov 2022 14:01:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667916107; bh=FKGE6f2PFdsNpwvPzMQ46wVESZS0/0Sg3wmCcvCTj6g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ggb3xoJDAb5UyRt1raVkTpH/++OincWA1B2YZNDGcHdYYd2IYF51LqNTUuJ8YPMLh UYVceE0URF2rocpXIlONO2whCM/9ENHNCIgycHUNrI4CvySJtqiEA+HdVa+g9yq5Yg m9tGHlH7FdVYu6al+96w+sBf7pqVRd1zIpgkr0OA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , Florian Fainelli , Linus Walleij , Miquel Raynal , Sasha Levin Subject: [PATCH 5.15 064/144] mtd: parsers: bcm47xxpart: Fix halfblock reads Date: Tue, 8 Nov 2022 14:39:01 +0100 Message-Id: <20221108133347.976144572@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221108133345.346704162@linuxfoundation.org> References: <20221108133345.346704162@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Linus Walleij [ Upstream commit 05e258c6ec669d6d18c494ea03d35962d6f5b545 ] There is some code in the parser that tries to read 0x8000 bytes into a block to "read in the middle" of the block. Well that only works if the block is also 0x10000 bytes all the time, else we get these parse errors as we reach the end of the flash: spi-nor spi0.0: mx25l1606e (2048 Kbytes) mtd_read error while parsing (offset: 0x200000): -22 mtd_read error while parsing (offset: 0x201000): -22 (...) Fix the code to do what I think was intended. Cc: stable@vger.kernel.org Fixes: f0501e81fbaa ("mtd: bcm47xxpart: alternative MAGIC for board_data partition") Cc: Rafał Miłecki Cc: Florian Fainelli Signed-off-by: Linus Walleij Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20221018091129.280026-1-linus.walleij@linaro.org Signed-off-by: Sasha Levin --- drivers/mtd/parsers/bcm47xxpart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/parsers/bcm47xxpart.c b/drivers/mtd/parsers/bcm47xxpart.c index 50fcf4c2174b..13daf9bffd08 100644 --- a/drivers/mtd/parsers/bcm47xxpart.c +++ b/drivers/mtd/parsers/bcm47xxpart.c @@ -233,11 +233,11 @@ static int bcm47xxpart_parse(struct mtd_info *master, } /* Read middle of the block */ - err = mtd_read(master, offset + 0x8000, 0x4, &bytes_read, + err = mtd_read(master, offset + (blocksize / 2), 0x4, &bytes_read, (uint8_t *)buf); if (err && !mtd_is_bitflip(err)) { pr_err("mtd_read error while parsing (offset: 0x%X): %d\n", - offset + 0x8000, err); + offset + (blocksize / 2), err); continue; } -- 2.35.1