net: dsa: sja1105: fix VL lookup command packing for P/Q/R/S

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At the beginning of the sja1105_dynamic_config.c file there is a diagram
of the dynamic config interface layout:

 packed_buf

 |
 V
 +-----------------------------------------+------------------+
 |              ENTRY BUFFER               |  COMMAND BUFFER  |
 +-----------------------------------------+------------------+

 <----------------------- packed_size ------------------------>

So in order to pack/unpack the command bits into the buffer,
sja1105_vl_lookup_cmd_packing must first advance the buffer pointer by
the length of the entry. This is similar to what the other *cmd_packing
functions do.

This bug exists because the command packing function for P/Q/R/S was
copied from the E/T generation, and on E/T, the command was actually
embedded within the entry buffer itself.

Fixes: 94f94d4acf ("net: dsa: sja1105: add static tables for virtual links")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

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Vladimir Oltean 2021-05-24 12:25:22 +03:00 • committed by David S. Miller

parent 1a6e9a9c68

commit ba61cf167c

1 changed files with 19 additions and 4 deletions

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23

drivers/net/dsa/sja1105/sja1105_dynamic_config.c

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