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Filename Latest commit message Latest commit date
Ido Schimmel 5a1a00f6ac mlxsw: pci: Only issue reset when system is ready 
[ Upstream commit 6002059d7882c3512e6ac52fa82424272ddfcd5c ]

During initialization the driver issues a software reset command and
then waits for the system status to change back to "ready" state.

However, before issuing the reset command the driver does not check that
the system is actually in "ready" state. On Spectrum-{1,2} systems this
was always the case as the hardware initialization time is very short.
On Spectrum-3 systems this is no longer the case. This results in the
software reset command timing-out and the driver failing to load:

[ 6.347591] mlxsw_spectrum3 0000:06:00.0: Cmd exec timed-out (opcode=40(ACCESS_REG),opcode_mod=0,in_mod=0)
[ 6.358382] mlxsw_spectrum3 0000:06:00.0: Reg cmd access failed (reg_id=9023(mrsr),type=write)
[ 6.368028] mlxsw_spectrum3 0000:06:00.0: cannot register bus device
[ 6.375274] mlxsw_spectrum3: probe of 0000:06:00.0 failed with error -110

Fix this by waiting for the system to become ready both before issuing
the reset command and afterwards. In case of failure, print the last
system status to aid in debugging.

Fixes: da382875c6 ("mlxsw: spectrum: Extend to support Spectrum-3 ASIC")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-01 11:01:32 +02:00
arch arm64: smp: fix crash_smp_send_stop() behaviour 2020-03-25 08:25:59 +01:00
block
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drivers mlxsw: pci: Only issue reset when system is ready 2020-04-01 11:01:32 +02:00
fs futex: Fix inode life-time issue 2020-03-25 08:25:58 +01:00
include mmc: core: Allow host controllers to require R1B for CMD6 2020-04-01 11:01:27 +02:00
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kernel futex: Unbreak futex hashing 2020-03-25 08:25:58 +01:00
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net ipv4: fix a RCU-list lock in inet_dump_fib() 2020-04-01 11:01:31 +02:00
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sound ALSA: hda/realtek: Fix pop noise on ALC225 2020-03-25 08:25:59 +01:00
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Makefile Linux 5.4.28 2020-03-25 08:26:00 +01:00
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.