From: Tom Lendacky <thomas.lenda...@amd.com> Date: Wed, 15 Mar 2017 17:52:44 -0500
> On 3/15/2017 5:41 PM, David Miller wrote: >> From: Tom Lendacky <thomas.lenda...@amd.com> >> Date: Wed, 15 Mar 2017 17:40:51 -0500 >> >>> On 3/15/2017 5:37 PM, David Miller wrote: >>>> From: Tom Lendacky <thomas.lenda...@amd.com> >>>> Date: Wed, 15 Mar 2017 15:11:23 -0500 >>>> >>>>> Newer hardware does not provide a cumulative payload length when >>>>> multiple >>>>> descriptors are needed to handle the data. Once the MTU increases >>>>> beyond >>>>> the size that can be handled by a single descriptor, the SKB does not >>>>> get >>>>> built properly by the driver. >>>>> >>>>> The driver will now calculate the size of the data buffers used by the >>>>> hardware. The first buffer of the first descriptor is for packet >>>>> headers >>>>> or packet headers and data when the headers can't be split. Subsequent >>>>> descriptors in a multi-descriptor chain will not use the first >>>>> buffer. The >>>>> second buffer is used by all the descriptors in the chain for payload >>>>> data. >>>>> Based on whether the driver is processing the first, intermediate, or >>>>> last >>>>> descriptor it can calculate the buffer usage and build the SKB >>>>> properly. >>>>> >>>>> Tested and verified on both old and new hardware. >>>>> >>>>> Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com> >>>> >>>> Applied, thanks Tom. >>> >>> Thanks David. This is another patch for 4.10 stable. Can you please >>> queue it up? >> >> Can you properly state this in your patch postings, instead of always >> mentioning it later? >> > > Sorry, yes, I can do that. I didn't realize you preferred it that > way. > Do you want the "Cc" tag to stable included in the patch or just > mention the stable targets in the patch description? I know you > coordinate the stable submissions and I don't want to mess anything > up. Just put a note after a "---" delimiter, requesting that I queue it up for -stable. Thanks.
