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[net-next,00/10] LAN7800 driver improvements

Message ID 20210823135229.36581-1-john.efstathiades@pebblebay.com
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Series LAN7800 driver improvements | expand

Message

John Efstathiades Aug. 23, 2021, 1:52 p.m. UTC 
This patch set introduces a number of improvements and fixes for
problems found during testing of a modification to add a NAPI-style
approach to packet handling to improve performance.

NOTE: the NAPI changes are not part of this patch set and the issues
      fixed by this patch set are not coupled to the NAPI changes.

Patch 1 fixes white space and style issues.

Patch 2 removes an unused timer.

Patch 3 introduces macros to set the internal packet FIFO flow
control levels, which makes it easier to update the levels in future.

Patch 4 removes an unused queue.

Patch 5 stops the device initiating USB link power management state
transitions that can introduce a packet transmit latency with some
USB 3 hosts and hubs.

Patch 6 updates the LAN7800 MAC reset code to ensure there is no
PHY register access in progress when the MAC is reset. This change
prevents a kernel exception that can otherwise occur.

Patch 7 fixes problems with system suspend and resume handling while
the device is transmitting and receiving data.

Patch 8 fixes problems with auto-suspend and resume handling and
depends on changes introduced by patch 7.

Patch 9 fixes problems with device disconnect handling that can result
in kernel exceptions and/or hang.

Patch 10 limits the rate at which driver warning messages are emitted.

John Efstathiades (10):
  lan78xx: Fix white space and style issues
  lan78xx: Remove unused timer
  lan78xx: Set flow control threshold to prevent packet loss
  lan78xx: Remove unused pause frame queue
  lan78xx: Disable USB3 link power state transitions
  lan78xx: Fix exception on link speed change
  lan78xx: Fix partial packet errors on suspend/resume
  lan78xx: Fix race conditions in suspend/resume handling
  lan78xx: Fix race condition in disconnect handling
  lan78xx: Limit number of driver warning messages

 drivers/net/usb/lan78xx.c | 1074 +++++++++++++++++++++++++++++--------
 1 file changed, 846 insertions(+), 228 deletions(-)