> From: Intel-wired-lan [mailto:[email protected]] On > Behalf Of Alexander Duyck > Sent: Wednesday, March 2, 2016 1:16 PM > To: [email protected]; [email protected]; intel-wired- > [email protected]; Kirsher, Jeffrey T <[email protected]>; > [email protected] > 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 <[email protected]> > --- > drivers/net/ethernet/intel/e1000/e1000_main.c | 19 > ++++++++++++++++++- > 1 file changed, 18 insertions(+), 1 deletion(-)
Tested-by: Aaron Brown <[email protected]>
