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Date: Mon, 14 Mar 2016 07:45:44 +0100 From: Andrzej Hajda <a.hajda@...sung.com> To: David Miller <davem@...emloft.net> Cc: tom@...bertland.com, b.zolnierkie@...sung.com, m.szyprowski@...sung.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] kcm: fix variable type On 03/11/2016 05:44 PM, David Miller wrote: > From: Andrzej Hajda <a.hajda@...sung.com> > Date: Fri, 11 Mar 2016 07:51:15 +0100 > >> Function skb_splice_bits can return negative values, its result should >> be assigned to signed variable to allow correct error checking. >> >> The problem has been detected using patch >> scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci. >> >> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com> > Since skb_splice_bits() returns an 'int', that would be a more appropriate > type to use here. > > Thank you. > > On the other side kcm_splice_read use this local var as return variable, and the return type is ssize_t. Digging deeper it looks like: ssize_t kcm_splice_read(...) returns result of int skb_splice_bits(...) which returns result of ssize_t splice_cb(...) callback. It looks code is somehow inconsistent, but maybe there are other reasons which I am not aware of. Regards Andrzej
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