cvs commit: src/sys/dev/an if_an.c if_an_pci.c if_anreg.h

[Doug Ambrisko]

ambrisko    2008-01-18 16:31:24 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/an           if_an.c if_an_pci.c if_anreg.h 
  Log:
  First real attempt at proper locking.  The locking is a little complicated
  since the the command and data that is being built to be sent to or read
  from the HW lives in the softc.  Commands are later run via an_setdef etc.
  In the ioctl path various references are kept to the data stored in
  the softc so it needs to be protected.  Almost think of the command
  in the softc a global variable since it essentially is.  Since locking
  wasn't done in this type of context the commands would get corrupted.
  
  Thanks to avatar@ for catching some lock issues and dhw@ for testing.
  
  Things are a lot more stable except for the MPI-350 cards.  My an(4)
  remote laptop stays on the network now.
  
  The driver should be changed so that it uses private memory that is passed
  to the functions that talk to the card.  Then only those functions would
  really need to grab locks.
  
  Reviewed by:    avatar@
  
  Revision  Changes    Path
  1.87      +248 -121  src/sys/dev/an/if_an.c
  1.29      +4 -1      src/sys/dev/an/if_an_pci.c
  1.25      +1 -0      src/sys/dev/an/if_anreg.h