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Date: Wed, 12 Aug 2020 13:06:06 -0700 (PDT) From: David Miller <davem@...emloft.net> To: ecree@...arflare.com Cc: linux-net-drivers@...arflare.com, netdev@...r.kernel.org, linux@...ck-us.net Subject: Re: [PATCH net] sfc: fix ef100 design-param checking From: Edward Cree <ecree@...arflare.com> Date: Wed, 12 Aug 2020 10:32:49 +0100 > The handling of the RXQ/TXQ size granularity design-params had two > problems: it had a 64-bit divide that didn't build on 32-bit platforms, > and it could divide by zero if the NIC supplied 0 as the value of the > design-param. Fix both by checking for 0 and for a granularity bigger > than our min-size; if the granularity <= EFX_MIN_DMAQ_SIZE then it fits > in 32 bits, so we can cast it to u32 for the divide. > > Reported-by: kernel test robot <lkp@...el.com> > Signed-off-by: Edward Cree <ecree@...arflare.com> Applied.
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