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Lad Prabhakar 1459017d56 net: pcs: rzn1-miic: Correct MODCTRL register offset 
commit a7195a3d67 upstream.

Correct the Mode Control Register (MODCTRL) offset for RZ/N MIIC.
According to the R-IN Engine and Ethernet Peripherals Manual (Rev.1.30)
[0], Table 10.1 "Ethernet Accessory Register List", MODCTRL is at offset
0x8, not 0x20 as previously defined.

Offset 0x20 actually maps to the Port Trigger Control Register (PTCTRL),
which controls PTP_MODE[3:0] and RGMII_CLKSEL[4]. Using this incorrect
definition prevented the driver from configuring the SW_MODE[4:0] bits
in MODCTRL, which control the internal connection of Ethernet ports. As
a result, the MIIC could not be switched into the correct mode, leading
to link setup failures and non-functional Ethernet ports on affected
systems.

[0] https://www.renesas.com/en/document/mah/rzn1d-group-rzn1s-group-rzn1l-group-users-manual-r-engine-and-ethernet-peripherals?r=1054571

Fixes: 7dc54d3b8d ("net: pcs: add Renesas MII converter driver")
Cc: stable@kernel.org
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://patch.msgid.link/20250901112019.16278-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-09-09 18:54:18 +02:00
arch x86/mm/64: define ARCH_PAGE_TABLE_SYNC_MASK and arch_sync_kernel_mappings() 2025-09-09 18:54:17 +02:00
block block: reject invalid operation in submit_bio_noacct 2025-08-28 16:26:10 +02:00
certs
crypto
Documentation bonding: Add independent control state machine 2025-08-28 16:26:18 +02:00
drivers net: pcs: rzn1-miic: Correct MODCTRL register offset 2025-09-09 18:54:18 +02:00
fs cifs: prevent NULL pointer dereference in UTF16 conversion 2025-09-09 18:54:18 +02:00
include mm: move page table sync declarations to linux/pgtable.h 2025-09-09 18:54:17 +02:00
init
io_uring
ipc
kernel bpf: Fix oob access in cgroup local storage 2025-09-09 18:54:11 +02:00
lib
LICENSES
mm mm/memory-failure: fix infinite UCE for VM_PFNMAP pfn 2025-08-28 16:26:16 +02:00
net batman-adv: fix OOB read/write in network-coding decode 2025-09-09 18:54:18 +02:00
rust
samples
scripts kconfig: lxdialog: fix 'space' to (de)select options 2025-08-28 16:26:02 +02:00
security apparmor: use the condition in AA_BUG_FMT even with debug disabled 2025-08-28 16:26:01 +02:00
sound ALSA: usb-audio: Add mute TLV for playback volumes on some devices 2025-09-09 18:54:16 +02:00
tools selftest: net: Fix weird setsockopt() in bind_bhash.c. 2025-09-09 18:54:16 +02:00
usr
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Makefile Linux 6.1.150 2025-09-04 15:26:31 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.