This is a note to let you know that I've just added the patch titled
mtd: rawnand: fsmc: Take instruction delay into account
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mtd-rawnand-fsmc-take-instruction-delay-into-account.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a4ca0c439f2d5ce9a3dc118d882f9f03449864c8 Mon Sep 17 00:00:00 2001
From: Herve Codina <herve.codina@xxxxxxxxxxx>
Date: Fri, 19 Nov 2021 16:03:15 +0100
Subject: mtd: rawnand: fsmc: Take instruction delay into account
From: Herve Codina <herve.codina@xxxxxxxxxxx>
commit a4ca0c439f2d5ce9a3dc118d882f9f03449864c8 upstream.
The FSMC NAND controller should apply a delay after the
instruction has been issued on the bus.
The FSMC NAND controller driver did not handle this delay.
Add this waiting delay in the FSMC NAND controller driver.
Fixes: 4da712e70294 ("mtd: nand: fsmc: use ->exec_op()")
Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx>
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20211119150316.43080-4-herve.codina@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/nand/raw/fsmc_nand.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/mtd/nand/raw/fsmc_nand.c
+++ b/drivers/mtd/nand/raw/fsmc_nand.c
@@ -18,6 +18,7 @@
#include <linux/clk.h>
#include <linux/completion.h>
+#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/dma-direction.h>
#include <linux/dma-mapping.h>
@@ -700,6 +701,9 @@ static int fsmc_exec_op(struct nand_chip
instr->ctx.waitrdy.timeout_ms);
break;
}
+
+ if (instr->delay_ns)
+ ndelay(instr->delay_ns);
}
return ret;
Patches currently in stable-queue which might be from herve.codina@xxxxxxxxxxx are
queue-4.19/mtd-rawnand-fsmc-take-instruction-delay-into-account.patch
