Messages in this thread | | | Date | Tue, 4 Nov 2014 11:29:12 +0100 | From | Lothar Waßmann <> | Subject | Re: net: fec: fix regression on i.MX28 introduced by rx_copybreak support |
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Hi David,
Lothar Waßmann wrote: > David Miller wrote: > > From: Lothar Waßmann <LW@KARO-electronics.de> > > Date: Thu, 30 Oct 2014 07:51:04 +0100 > > > > >> Also, I don't thnk your DIV_ROUND_UP() eliminate for the loop > > >> in swap_buffer() is valid. The whole point is that the current > > >> code handles buffers which have a length which is not a multiple > > >> of 4 properly, after your change it will no longer do so. > > >> > > > Do you really think so? > > > > Yes, because you're rounding down so you'll miss the final > > partial word (if any). > > > Nope. DIV_ROUND_UP() would give '1' as upper bound for lengths from 1 to > 4, '2' for lengths from 5 to 8 and so on. > > The loop with increment 4 and i < len does exactly the same. > Try it for yourself, if you don't believe it. > > Do you still think, the loop without DIV_ROUND_UP() is incorrect, or can this patch be applied?
Lothar Waßmann -- ___________________________________________________________
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