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    FromMichael Frank <>
    SubjectFwd: [Swsusp-devel] Kernel 2.6 pm_send_all() issues.
    DateTue, 10 Feb 2004 23:43:06 +0800
    This question is probably better suited for LKML.
    
    ----------  Forwarded Message  ----------
    Subject: [Swsusp-devel] Kernel 2.6 pm_send_all() issues.
    Date: Tuesday 10 February 2004 04:06
    From: Wolfgang Glas <wolfgang.glas@ev-i.at>
    To: swsusp-devel@lists.sourceforge.net
    
    Coming back to an earlier post, which states, that NVidia suspend/resume under 
    2.6.x could be resurrected, if  drivers_suspend() and drivers_resume() in 
    swsusp.c are tuned in a way, that pm_send_all() is called, I want to direct 
    the following question to more eligible persons in this list:
    
      I inspected NVidia's driver and I found out, that it's implemented as a 
    character device and hence does not implement the suspend/resume kernel 
    driver interface, which has been introduced in linux-2.6. But nevertheless 
    this driver has the ability to register its own power management handler 
    through pm_register(), an interface already present in linux-2.4 and still 
    used in some 20 drivers present in the linux-2.6.1 code base, most notable 
    some audio driver and some irda drivers.
    
      Diving further into the code, I recognized, that the kernel function 
    ppm_send_all(), which calls all handlers registered through pm_register() is 
    never called inside of swsusp2.c
    
      So, what I want to ask is, whether the pm_register/pm_send/pm_send_all 
    interface is simply deprecated and the NVidia driver (and other drivers, 
    which use pm_register) should be reeingineered in order to use the 
    resume/suspend interface of linux-2.6. Or should we try to modify swsusp2.c 
    in a way, that it additionally calls  pm_send_all for these drivers?
    
       TIA,
    
          Wolfgang
    
    
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