mtd: rawnand: davinci: Avoid duplicated page read
authorPaul Cercueil <paul@crapouillou.net>
Sat, 16 Oct 2021 13:22:25 +0000 (14:22 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 27 Jan 2022 10:02:49 +0000 (11:02 +0100)
commit3f5eb2d8903216b14be26ca98bc477dbf7522f1c
treeed2c545022ac8b39d8e9e1774a3e6dc73a9a7c6a
parenteebc910e09d48f1f47670993c29389f728c5e4c6
mtd: rawnand: davinci: Avoid duplicated page read

commit 9c9d709965385de5a99f84b14bd5860e1541729e upstream.

The function nand_davinci_read_page_hwecc_oob_first() first reads the
OOB data, extracts the ECC information, programs the ECC hardware before
reading the actual data in a loop.

Right after the OOB data was read, it called nand_read_page_op() to
reset the read cursor to the beginning of the page. This caused the
first page to be read twice: in that call, and later in the loop.

Address that issue by changing the call to nand_read_page_op() to
nand_change_read_column_op(), which will only reset the read cursor.

Cc: <stable@vger.kernel.org> # v5.2
Fixes: a0ac778eb82c ("mtd: rawnand: ingenic: Add support for the JZ4740")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211016132228.40254-2-paul@crapouillou.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mtd/nand/raw/davinci_nand.c