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Re: [Xen-devel] [PATCH 3/4] VT-d/qinval: clean up error handling

Jan Beulich wrote on 2014-06-16:
> - neither qinval_update_qtail() nor qinval_next_index() can fail: make
>   the former return "void", and drop caller error checks for the latter
>   (all of which would otherwise return with a spin lock still held)

I saw lots of other functions are never fail too, e.g., gen_cc_inv_dsc(), 
gen_iotlb_inv_dsc(), gen_wait_dsc() and others. Any reason only changes the 
above two and keeps others?

Best regards,

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