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

[William D Waddington <william.waddington@beezmo.com>]

Arjan van de Ven wrote:
> 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..

No I didn't :) It's just too ugly for public view.  And I notice it
needs some other fix-ups like fixed width data types in the ioctl
routine...

Thanks to all for the info.  I've got some typing to do.

Bill