kernel/linux.git/drivers/mtd/devices, branch v5.4.113

mtd: phram: fix a double free issue in error path

2020-04-23T08:36:45+00:00

commit 49c64df880570034308e4a9a49c4bc95cf8cdb33 upstream. The variable 'name' is released multiple times in the error path, which may cause double free issues. This problem is avoided by adding a goto label to release the memory uniformly. And this change also makes the code a bit more cleaner. Fixes: 4f678a58d335 ("mtd: fix memory leaks in phram_setup") Signed-off-by: Wen Yang Cc: Joern Engel Cc: Miquel Raynal Cc: Richard Weinberger Cc: Vignesh Raghavendra Cc: linux-mtd@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200318153156.25612-1-wenyang@linux.alibaba.com Signed-off-by: Greg Kroah-Hartman

mtd: devices: fix mchp23k256 read and write

2020-01-23T07:22:57+00:00

commit 14f89e088155314d311e4d4dd9f2b4ccaeef92b2 upstream. Due to the use of sizeof(), command size set for the spi transfer was wrong. Driver was sending and receiving always 1 byte less and especially on write, it was hanging. echo -n -e "\\x1\\x2\\x3\\x4" > /dev/mtd1 And read part too now works as expected. hexdump -C -n16 /dev/mtd1 00000000 01 02 03 04 ab f3 ad c2 ab e3 f4 36 dd 38 04 15 00000010 Fixes: 4379075a870b ("mtd: mchp23k256: Add support for mchp23lcv1024") Signed-off-by: Angelo Dureghello Reviewed-by: Andrew Lunn Signed-off-by: Miquel Raynal Signed-off-by: Greg Kroah-Hartman

mtd: spear_smi: Fix Write Burst mode

2019-12-17T18:55:53+00:00

commit 69c7f4618c16b4678f8a4949b6bb5ace259c0033 upstream. Any write with either dd or flashcp to a device driven by the spear_smi.c driver will pass through the spear_smi_cpy_toio() function. This function will get called for chunks of up to 256 bytes. If the amount of data is smaller, we may have a problem if the data length is not 4-byte aligned. In this situation, the kernel panics during the memcpy: # dd if=/dev/urandom bs=1001 count=1 of=/dev/mtd6 spear_smi_cpy_toio [620] dest c9070000, src c7be8800, len 256 spear_smi_cpy_toio [620] dest c9070100, src c7be8900, len 256 spear_smi_cpy_toio [620] dest c9070200, src c7be8a00, len 256 spear_smi_cpy_toio [620] dest c9070300, src c7be8b00, len 233 Unhandled fault: external abort on non-linefetch (0x808) at 0xc90703e8 [...] PC is at memcpy+0xcc/0x330 The above error occurs because the implementation of memcpy_toio() tries to optimize the number of I/O by writing 4 bytes at a time as much as possible, until there are less than 4 bytes left and then switches to word or byte writes. Unfortunately, the specification states about the Write Burst mode: "the next AHB Write request should point to the next incremented address and should have the same size (byte, half-word or word)" This means ARM architecture implementation of memcpy_toio() cannot reliably be used blindly here. Workaround this situation by update the write path to stick to byte access when the burst length is not multiple of 4. Fixes: f18dbbb1bfe0 ("mtd: ST SPEAr: Add SMI driver for serial NOR flash") Cc: Russell King Cc: Boris Brezillon Cc: stable@vger.kernel.org Signed-off-by: Miquel Raynal Reviewed-by: Russell King Signed-off-by: Greg Kroah-Hartman

mtd: pmc551: Remove set but not used variable 'soff_lo'

2019-09-15T21:51:07+00:00

Fixes gcc '-Wunused-but-set-variable' warning: drivers/mtd/devices/pmc551.c: In function pmc551_erase: drivers/mtd/devices/pmc551.c:142:15: warning: variable soff_lo set but not used [-Wunused-but-set-variable] drivers/mtd/devices/pmc551.c: In function pmc551_read: drivers/mtd/devices/pmc551.c:232:15: warning: variable soff_lo set but not used [-Wunused-but-set-variable] drivers/mtd/devices/pmc551.c: In function pmc551_write: drivers/mtd/devices/pmc551.c:289:15: warning: variable soff_lo set but not used [-Wunused-but-set-variable] It is not used since commit cdf0a7d16980 ("[MTD] pmc551 whitespace cleanup") Reported-by: Hulk Robot Signed-off-by: zhengbin Signed-off-by: Richard Weinberger

mtd: phram: Module parameters add writable permissions

2019-09-15T21:50:38+00:00

The phram code implements managing multiple devices through a linked list. However, due to the module parameter permission of 0, the /sys/module/phram/parameters/phram interface is missing. The command line arguments in insmod can only create one device. Therefore, add writable permissions to the module parameters, create /sys/module/phram/parameters/phram interface, and create multi-device support. Signed-off-by: Xiaoming Ni Signed-off-by: Richard Weinberger

mtd: spi-nor: Move m25p80 code in spi-nor.c

2019-08-12T07:54:12+00:00

The m25p80 driver is actually a generic wrapper around the spi-mem layer. Not only the driver name is misleading, but we'd expect such a common logic to be directly available in the core. Another reason for moving this code is that SPI NOR controller drivers should progressively be replaced by SPI controller drivers implementing the spi_mem_ops interface, and when the conversion is done, we should have a single spi-nor driver directly interfacing with the spi-mem layer. While moving the code we also fix a longstanding issue when non-DMA-able buffers are passed by the MTD layer. Signed-off-by: Boris Brezillon Signed-off-by: Vignesh Raghavendra Signed-off-by: Tudor Ambarus

docs: kbuild: convert docs to ReST and rename to *.rst

2019-06-14T20:21:21+00:00

The kbuild documentation clearly shows that the documents there are written at different times: some use markdown, some use their own peculiar logic to split sections. Convert everything to ReST without affecting too much the author's style and avoiding adding uneeded markups. The conversion is actually: - add blank lines and identation in order to identify paragraphs; - fix tables markups; - add some lists markups; - mark literal blocks; - adjust title markups. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Jonathan Corbet

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 420

2019-06-05T15:37:15+00:00

Based on 1 normalized pattern(s): this code is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 6 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Armijn Hemel Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190113.627158185@linutronix.de Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 380

2019-06-05T15:37:11+00:00

Based on 1 normalized pattern(s): license as part of this driver was derived from the slram c driver it falls under the same license which is gnu general public license v2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 1 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Kate Stewart Reviewed-by: Armijn Hemel Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531081037.083494189@linutronix.de Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

2019-05-30T18:26:37+00:00

Based on 3 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 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 [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] 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 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 [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Richard Fontana Reviewed-by: Kate Stewart Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman