From: Feng Tang <[email protected]> Date: Sun, 12 Jun 2016 17:36:37 +0800
> Commit 26c5f03 uses a new skb allocator to avoid the RFD overflow > issue. > > But from debugging without datasheet, we found the error always > happen when the DMA RX address is set to 0x....fc0, which is very > likely to be a HW/silicon problem. > > So one idea is instead of adding a new allocator, why not just > hitting the right target by avaiding the error-prone DMA address? > > This patch will actually > * Remove the commit 26c5f03 > * Apply rx skb with 64 bytes longer space, and if the allocated skb > has a 0x...fc0 address, it will use skb_resever(skb, 64) to > advance the address, so that the RX overflow can be avoided. > > In theory this method should also apply to atl1c driver, which > I can't find anyone who can help to test on real devices. > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=70761 > Signed-off-by: Feng Tang <[email protected]> > Suggested-by: Eric Dumazet <[email protected]> > Tested-by: Ole Lukoie <[email protected]> Applied.
