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| author | Jianheng Zhang <Jianheng.Zhang@synopsys.com> | 2023-12-01 06:22:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-13 20:45:05 +0300 |
| commit | e1fbdef91b1ceb3f98afc47fda725f92a6255b27 (patch) | |
| tree | daacbe6fa358a0eefa30e9844eb142e6f365c032 /net/xdp/xsk.c | |
| parent | 9cc9fbe5c02804bb83037599591b6bed09d325af (diff) | |
| download | linux-e1fbdef91b1ceb3f98afc47fda725f92a6255b27.tar.xz | |
net: stmmac: fix FPE events losing
[ Upstream commit 37e4b8df27bc68340f3fc80dbb27e3549c7f881c ]
The status bits of register MAC_FPE_CTRL_STS are clear on read. Using
32-bit read for MAC_FPE_CTRL_STS in dwmac5_fpe_configure() and
dwmac5_fpe_send_mpacket() clear the status bits. Then the stmmac interrupt
handler missing FPE event status and leads to FPE handshaking failure and
retries.
To avoid clear status bits of MAC_FPE_CTRL_STS in dwmac5_fpe_configure()
and dwmac5_fpe_send_mpacket(), add fpe_csr to stmmac_fpe_cfg structure to
cache the control bits of MAC_FPE_CTRL_STS and to avoid reading
MAC_FPE_CTRL_STS in those methods.
Fixes: 5a5586112b92 ("net: stmmac: support FPE link partner hand-shaking procedure")
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Jianheng Zhang <Jianheng.Zhang@synopsys.com>
Link: https://lore.kernel.org/r/CY5PR12MB637225A7CF529D5BE0FBE59CBF81A@CY5PR12MB6372.namprd12.prod.outlook.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/xdp/xsk.c')
0 files changed, 0 insertions, 0 deletions