> From: Intel-wired-lan [mailto:intel-wired-lan-boun...@lists.osuosl.org] On > Behalf Of Alexander Duyck > Sent: Wednesday, March 2, 2016 1:16 PM > To: netdev@vger.kernel.org; jogre...@redhat.com; intel-wired- > l...@lists.osuosl.org; Kirsher, Jeffrey T <jeffrey.t.kirs...@intel.com>; > sassm...@redhat.com > Subject: [Intel-wired-lan] [net PATCH 2/2] e1000: Double Tx descriptors > needed check for 82544 > > The 82544 has code that adds one additional descriptor per data buffer. > However we weren't taking that into acount when determining the > descriptors > needed for the next transmit at the end of the xmit_frame path. > > This change takes that into account by doubling the number of descriptors > needed for the 82544 so that we can avoid a potential issue where we could > hang the Tx ring by loading frames with xmit_more enabled and then > stopping > the ring without writing the tail. > > In addition it adds a few more descriptors to account for some additional > workarounds that have been added over time. > > Signed-off-by: Alexander Duyck <adu...@mirantis.com> > --- > drivers/net/ethernet/intel/e1000/e1000_main.c | 19 > ++++++++++++++++++- > 1 file changed, 18 insertions(+), 1 deletion(-)
Tested-by: Aaron Brown <aaron.f.br...@intel.com>
