From 509cbbdec9d767cfe6c7884f17cbb96dff9af557 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 18 Oct 2022 11:11:29 +0200 Subject: [PATCH] mtd: parsers: bcm47xxpart: Fix halfblock reads MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit [ 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 50fcf4c..13daf9b 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; } -- 2.7.4