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Filename Latest commit message Latest commit date
Vadim Pasternak f1436c8036 mlxsw: core: Prevent reading unsupported slave address from SFP EEPROM 
Prevent reading unsupported slave address from SFP EEPROM by testing
Diagnostic Monitoring Type byte in EEPROM. Read only page zero of
EEPROM, in case this byte is zero.

If some SFP transceiver does not support Digital Optical Monitoring
(DOM), reading SFP EEPROM slave address 0x51 could return an error.
Availability of DOM support is verified by reading from zero page
Diagnostic Monitoring Type byte describing how diagnostic monitoring is
implemented by transceiver. If bit 6 of this byte is set, it indicates
that digital diagnostic monitoring has been implemented. Otherwise it is
not and transceiver could fail to reply to transaction for slave address
0x51 [1010001X (A2h)], which is used to access measurements page.

Such issue has been observed when reading cable MCP2M00-xxxx,
MCP7F00-xxxx, and few others.

Fixes: 2ea109039c ("mlxsw: spectrum: Add support for access cable info via ethtool")
Fixes: 4400081b63 ("mlxsw: spectrum: Fix EEPROM access in case of SFP/SFP+")
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-18 13:13:40 -07:00
arch Merge branch 'parisc-5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2019-05-14 13:17:19 -07:00
block
certs
crypto
Documentation Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2019-05-15 18:28:44 -07:00
drivers mlxsw: core: Prevent reading unsupported slave address from SFP EEPROM 2019-05-18 13:13:40 -07:00
fs Merge branch 'akpm' (patches from Andrew) 2019-05-14 10:10:55 -07:00
include net/mlx5: E-Switch, Correct type to u16 for vport_num and int for vport_index 2019-05-17 13:16:47 -07:00
init init: free_initmem: poison freed init memory 2019-05-14 09:47:47 -07:00
ipc
kernel bpf: relax inode permission check for retrieving bpf program 2019-05-16 11:31:49 -07:00
lib lib: Correct comment of prandom_seed 2019-05-17 11:32:47 -07:00
LICENSES
mm Merge branch 'akpm' (patches from Andrew) 2019-05-14 10:10:55 -07:00
net vsock/virtio: Initialize core virtio vsock before registering the driver 2019-05-18 10:50:28 -07:00
samples Add gitignore file for samples/vfs/ generated files 2019-05-14 13:30:10 -07:00
scripts gcc-plugin fix: 2019-05-13 16:01:52 -07:00
security Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-13 15:15:00 -07:00
sound sound updates for 5.2-rc1 2019-05-09 08:26:55 -07:00
tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2019-05-17 16:33:06 -07:00
usr
virt mm/mmu_notifier: convert user range->blockable to helper function 2019-05-14 09:47:49 -07:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap A reasonably busy cycle for docs, including: 2019-05-08 12:42:50 -07:00
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS NFC: Orphan the subsystem 2019-05-14 15:31:47 -07:00
Makefile
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.