4b14b42abf
This CFI patch was accepted upstream for 5.13. Move it away from under ath79 and place under backports to be removed in due time. Signed-off-by: Mauri Sandberg <sandberg@mailfence.com>
55 lines
2.2 KiB
Diff
55 lines
2.2 KiB
Diff
From 7e4404113686868858a34210c28ae122e967aa64 Mon Sep 17 00:00:00 2001
|
|
From: Mauri Sandberg <sandberg@mailfence.com>
|
|
Date: Tue, 9 Mar 2021 19:48:59 +0200
|
|
Subject: [PATCH] mtd: cfi_cmdset_0002: Disable buffered writes for AMD chip
|
|
0x2201
|
|
|
|
Buffer writes do not work with AMD chip 0x2201. The chip in question
|
|
is a AMD/Spansion/Cypress Semiconductor S29GL256N and datasheet [1]
|
|
talks about writing buffers being possible. While waiting for a neater
|
|
solution resort to writing word-sized chunks only.
|
|
|
|
Without the patch kernel logs will be flooded with entries like below:
|
|
|
|
jffs2_scan_eraseblock(): End of filesystem marker found at 0x0
|
|
jffs2_build_filesystem(): unlocking the mtd device...
|
|
done.
|
|
jffs2_build_filesystem(): erasing all blocks after the end marker...
|
|
MTD do_write_buffer_wait(): software timeout, address:0x01ec000a.
|
|
jffs2: Write clean marker to block at 0x01920000 failed: -5
|
|
MTD do_write_buffer_wait(): software timeout, address:0x01e2000a.
|
|
jffs2: Write clean marker to block at 0x01880000 failed: -5
|
|
MTD do_write_buffer_wait(): software timeout, address:0x01e0000a.
|
|
jffs2: Write clean marker to block at 0x01860000 failed: -5
|
|
MTD do_write_buffer_wait(): software timeout, address:0x01dc000a.
|
|
jffs2: Write clean marker to block at 0x01820000 failed: -5
|
|
MTD do_write_buffer_wait(): software timeout, address:0x01da000a.
|
|
jffs2: Write clean marker to block at 0x01800000 failed: -5
|
|
...
|
|
|
|
Tested on a Buffalo wzr-hp-g300nh running kernel 5.10.16.
|
|
|
|
[1] https://www.cypress.com/file/219941/download
|
|
or https://datasheetspdf.com/pdf-file/565708/SPANSION/S29GL256N/1
|
|
|
|
Signed-off-by: Mauri Sandberg <sandberg@mailfence.com>
|
|
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
|
|
Link: https://lore.kernel.org/r/20210309174859.362060-1-sandberg@mailfence.com
|
|
---
|
|
drivers/mtd/chips/cfi_cmdset_0002.c | 4 ++++
|
|
1 file changed, 4 insertions(+)
|
|
|
|
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
|
|
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
|
|
@@ -272,6 +272,10 @@ static void fixup_use_write_buffers(stru
|
|
{
|
|
struct map_info *map = mtd->priv;
|
|
struct cfi_private *cfi = map->fldrv_priv;
|
|
+
|
|
+ if (cfi->mfr == CFI_MFR_AMD && cfi->id == 0x2201)
|
|
+ return;
|
|
+
|
|
if (cfi->cfiq->BufWriteTimeoutTyp) {
|
|
pr_debug("Using buffer write method\n");
|
|
mtd->_write = cfi_amdstd_write_buffers;
|