This is a note to let you know that I've just added the patch titled
mtd: nand: fsl_ifc: Fix nand waitfunc return value
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: mtd-nand-fsl_ifc-fix-nand-waitfunc-return-value.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From fa8e6d58c5bc260f4369c6699683d69695daed0a Mon Sep 17 00:00:00 2001
From: Jagdish Gediya jagdish.gediya@nxp.com Date: Wed, 21 Mar 2018 04:31:36 +0530 Subject: mtd: nand: fsl_ifc: Fix nand waitfunc return value
From: Jagdish Gediya jagdish.gediya@nxp.com
commit fa8e6d58c5bc260f4369c6699683d69695daed0a upstream.
As per the IFC hardware manual, Most significant 2 bytes in nand_fsr register are the outcome of NAND READ STATUS command.
So status value need to be shifted and aligned as per the nand framework requirement.
Fixes: 82771882d960 ("NAND Machine support for Integrated Flash Controller") Cc: stable@vger.kernel.org # v3.18+ Signed-off-by: Jagdish Gediya jagdish.gediya@nxp.com Reviewed-by: Prabhakar Kushwaha prabhakar.kushwaha@nxp.com Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mtd/nand/fsl_ifc_nand.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -656,6 +656,7 @@ static int fsl_ifc_wait(struct mtd_info struct fsl_ifc_ctrl *ctrl = priv->ctrl; struct fsl_ifc_runtime __iomem *ifc = ctrl->rregs; u32 nand_fsr; + int status;
/* Use READ_STATUS command, but wait for the device to be ready */ ifc_out32((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | @@ -670,12 +671,12 @@ static int fsl_ifc_wait(struct mtd_info fsl_ifc_run_command(mtd);
nand_fsr = ifc_in32(&ifc->ifc_nand.nand_fsr); - + status = nand_fsr >> 24; /* * The chip always seems to report that it is * write-protected, even when it is not. */ - return nand_fsr | NAND_STATUS_WP; + return status | NAND_STATUS_WP; }
static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
Patches currently in stable-queue which might be from jagdish.gediya@nxp.com are
queue-4.9/mtd-nand-fsl_ifc-fix-nand-waitfunc-return-value.patch queue-4.9/mtd-nand-fsl_ifc-fix-eccstat-array-overflow-for-ifc-ver-2.0.0.patch queue-4.9/mtd-nand-fsl_ifc-read-eccstat0-and-eccstat1-registers-for-ifc-2.0.patch