diff options
author | Lars Persson <lars.persson@axis.com> | 2019-04-15 09:50:34 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-20 09:07:54 +0200 |
commit | b142075137c31c1009069f01d6882c06cf760156 (patch) | |
tree | 37c1290fd1470433a24c10a9ec59c71319b2e1b9 /include/linux/console.h | |
parent | b6178400e55080fd1fcf3ddbfd2e5c61b83c6421 (diff) |
net: stmmac: Set dma ring length before enabling the DMA
This was fixed in upstream by commit 7d9e6c5afab6 ("net: stmmac: Integrate
XGMAC into main driver flow") that is a new feature commit.
We found a race condition in the DMA init sequence that hits if the
PHY already has link up during stmmac_hw_setup. Since the ring length
was programmed after enabling the RX path, we might receive a packet
before the correct ring length is programmed. When that happened we
could not get reliable interrupts for DMA RX and the MTL complained
about RX FIFO overrun.
Signed-off-by: Lars Persson <larper@axis.com>
Cc: stable@vger.kernel.org # 4.9.x
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/console.h')
0 files changed, 0 insertions, 0 deletions