Re: [RFCLUE2] 64 bit driver 32 bit app ioctl

[Arjan van de Ven]

On Thu, 2006-03-23 at 07:06 -0800, William D Waddington wrote:
> Apologies for dashing this off without the proper homework.  My
> customer is out of country doing an installation, and didn't test
> this configuration first :(
> 
> Customer is running RHEL3 on a 64 bit PC.  Running the 64 bit kernel
> and my 64 bit driver.  They are calling the driver from their 32 bit
> app.  The driver supports a whole mess of ioctls.
> 
> It seems that the kernel is trapping the 32-bit ioctl call and returning
> an error to the app w/out calling the driver.  It looks like
> register_ioctl32_conversion() can convice the kernel that the driver can
> handle 32-bit calls, but it has to be called for each ioctl cmd (??)

you forgot to attach you code btw or post the url to it..


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