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| author |   Mauri Sandberg <sandberg@mailfence.com> | 2021-03-09 19:48:59 +0200 |
|---|---|---|
| committer |   Vignesh Raghavendra <vigneshr@ti.com> | 2021-04-08 00:11:42 +0530 |
| commit | 7e4404113686868858a34210c28ae122e967aa64 (patch) | |
| tree | 4eb90e3acdbb8bdc4dd92dc354b96381ba5d0b57 /drivers | |
| parent | Linux 5.12-rc2 (diff) | |
| download | linux-dev-7e4404113686868858a34210c28ae122e967aa64.tar.xz linux-dev-7e4404113686868858a34210c28ae122e967aa64.zip | |
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
Diffstat (limited to '')
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0002.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index a1f3e1031c3d..0bd8b5af28c6 100644 --- 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(struct mtd_info *mtd) { 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; |