From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fCOFL-0004lO-TD for linux-mtd@lists.infradead.org; Sat, 28 Apr 2018 11:42:33 +0000 Date: Sat, 28 Apr 2018 13:42:18 +0200 From: Miquel Raynal To: Jane Wan Cc: dwmw2@infradead.org, computersforpeace@gmail.com, ties.bos@nokia.com, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, Boris Brezillon Subject: Re: [PATCH 1/2] Fix FSL NAND driver to read all ONFI parameter pages Message-ID: <20180428134218.3ae857eb@xps13> In-Reply-To: <1524788396-32380-2-git-send-email-Jane.Wan@nokia.com> References: <1524788396-32380-1-git-send-email-Jane.Wan@nokia.com> <1524788396-32380-2-git-send-email-Jane.Wan@nokia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Jane, You forgot to Cc the right maintainers, please use ./scripts/get_maintainer.pl for that. > Signed-off-by: Jane Wan Please add a description of what your are doing in the commit message. The description in the cover letter is good, you can copy the relevant section here. > --- > drivers/mtd/nand/fsl_ifc_nand.c | 10 ++++++---- Also, just for you to know, files have moved in a raw/ subdirectory, so please rebase on top of 4.17-rc1 and prefix the commit title with "mtd: rawnand: fsl_ifc:". > 1 file changed, 6 insertions(+), 4 deletions(-) >=20 > diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_n= and.c > index ca36b35..a3cf6ca 100644 > --- a/drivers/mtd/nand/fsl_ifc_nand.c > +++ b/drivers/mtd/nand/fsl_ifc_nand.c > @@ -413,6 +413,7 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, uns= igned int command, > struct fsl_ifc_mtd *priv =3D chip->priv; > struct fsl_ifc_ctrl *ctrl =3D priv->ctrl; > struct fsl_ifc_runtime __iomem *ifc =3D ctrl->rregs; > + int len; > =20 > /* clear the read buffer */ > ifc_nand_ctrl->read_bytes =3D 0; > @@ -462,11 +463,12 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, u= nsigned int command, > ifc_out32(column, &ifc->ifc_nand.row3); > =20 > /* > - * although currently it's 8 bytes for READID, we always read > - * the maximum 256 bytes(for PARAM) > + * For READID, read 8 bytes that are currently used. > + * For PARAM, read all 3 copies of 256-bytes pages. > */ > - ifc_out32(256, &ifc->ifc_nand.nand_fbcr); > - ifc_nand_ctrl->read_bytes =3D 256; > + len =3D (command =3D=3D NAND_CMD_PARAM) ? (3 * 256) : 8; There is already a "command =3D=3D NAND_CMD_PARAM" condition above, you might want to use it. > + ifc_out32(len, &ifc->ifc_nand.nand_fbcr); > + ifc_nand_ctrl->read_bytes =3D len; > =20 > set_addr(mtd, 0, 0, 0); > fsl_ifc_run_command(mtd); The overall ->cmdfunc() approach of this driver is horrible. However this fixes its implementation to match the current state of the core, so I guess it is fine. Regards, Miqu=C3=A8l --=20 Miquel Raynal, Bootlin (formerly Free Electrons) Embedded Linux and Kernel engineering https://bootlin.com