linux-stable.git/drivers/mtd/ubi/debug.c, branch linux-5.4.y

ubi: Fix seq_file usage in detailed_erase_block_info debugfs file

2020-05-27T15:46:19+00:00

[ Upstream commit 0e7572cffe442290c347e779bf8bd4306bb0aa7c ]

3bfa7e141b0b ("fs/seq_file.c: seq_read(): add info message about buggy .next functions")
showed that we don't use seq_file correctly.
So make sure that our ->next function always updates the position.

Fixes: 7bccd12d27b7 ("ubi: Add debugfs file for tracking PEB state")
Signed-off-by: Richard Weinberger 
Signed-off-by: Sasha Levin

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

2019-05-30T18:26:35+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Reviewed-by: Richard Fontana 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman

ubi: Add debugfs file for tracking PEB state

2017-05-08T18:49:02+00:00

Add a file under debugfs to allow easy access to the erase count for
each physical erase block on an UBI device.  This is useful when
debugging data integrity issues with UBIFS on NAND flash devices.

Signed-off-by: Ben Shelton 
Signed-off-by: Zach Brown 

v2:
* If ubi_io_is_bad eraseblk_count_seq_show just returns the err.
* if ubi->lookuptbl returns null, its no longer treated as an error
  instead info for that block is not printeded
* Removed check for UBI_MAX_ERASECOUNTER since it is impossible to hit
* Removed block state from print, if a block is printed then it is good and
  if it is not printed, then it is bad.

v3:
* Remove errant ! symbol from if statement checking if erase count is valid.
Signed-off-by: Richard Weinberger

UBI: Silence an unintialized variable warning

2016-05-24T13:24:30+00:00

My static checker complains that "val" is uninitialized when kstrtoint()
fails.

Signed-off-by: Dan Carpenter 
Signed-off-by: Richard Weinberger

UBI: fix return error code

2015-12-16T21:45:04+00:00

We are checking dfs_rootdir for error value or NULL. But in the
conditional ternary operator we returned -ENODEV if dfs_rootdir contains
an error value and returned PTR_ERR(dfs_rootdir) if dfs_rootdir is NULL.
So in the case of dfs_rootdir being NULL we actually assigned 0 to err
and returned it to the caller implying a success.
Lets return -ENODEV when dfs_rootdir is NULL else return
PTR_ERR(dfs_rootdir).

Signed-off-by: Sudip Mukherjee 
Signed-off-by: Richard Weinberger

UBI: power cut emulation for testing

2015-04-13T19:05:17+00:00

Emulate random power cuts by switching device to ro after a number of
writes to allow simple power cut testing with nand-sim.

Maximum and minimum number of successful writes before power cut and
what kind of writes (EC header, VID header or none) to interrupt
configurable via debugfs.

Signed-off-by: David Oberhollenzer 
Signed-off-by: Richard Weinberger

UBI: Add initial support for fastmap self checks

2015-03-26T21:46:03+00:00

Using this debugfs knob fastmap self checks can be controlled.

Signed-off-by: Richard Weinberger 
Reviewed-by: Tanya Brokhman

UBI: Extend UBI layer debug/messaging capabilities

2014-11-07T10:08:51+00:00

If there is more then one UBI device mounted, there is no way to
distinguish between messages from different UBI devices.
Add device number to all ubi layer message types.

The R/O block driver messages were replaced by pr_* since
ubi_device structure is not used by it.

Amended a bit by Artem.

Signed-off-by: Tanya Brokhman 
Signed-off-by: Artem Bityutskiy

UBI: embed ubi_debug_info field in ubi_device struct

2012-12-10T11:38:59+00:00

ubi_debug_info struct was dynamically allocated which
is always suboptimal, for it tends to fragment memory
and make the code error-prone.
Fix this by embedding it in ubi_device struct.

Signed-off-by: Ezequiel Garcia 
Signed-off-by: Artem Bityutskiy

UBI: use pr_ helper instead of printk

2012-09-04T06:39:02+00:00

Use 'pr_err()' instead of 'printk(KERN_ERR', etc.

Signed-off-by: Artem Bityutskiy