This is a note to let you know that I've just added the patch titled
net: stmmac: xgmac: Disable FPE MMC interrupts
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-stmmac-xgmac-disable-fpe-mmc-interrupts.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fe323ec4679ae4f983cd811af2e8f9ba4973ae56
Author: Furong Xu <0x1207@xxxxxxxxx>
Date: Sat Nov 25 14:01:26 2023 +0800
net: stmmac: xgmac: Disable FPE MMC interrupts
[ Upstream commit e54d628a2721bfbb002c19f6e8ca6746cec7640f ]
Commit aeb18dd07692 ("net: stmmac: xgmac: Disable MMC interrupts
by default") tries to disable MMC interrupts to avoid a storm of
unhandled interrupts, but leaves the FPE(Frame Preemption) MMC
interrupts enabled, FPE MMC interrupts can cause the same problem.
Now we mask FPE TX and RX interrupts to disable all MMC interrupts.
Fixes: aeb18dd07692 ("net: stmmac: xgmac: Disable MMC interrupts by default")
Reviewed-by: Larysa Zaremba <larysa.zaremba@xxxxxxxxx>
Signed-off-by: Furong Xu <0x1207@xxxxxxxxx>
Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx>
Reviewed-by: Wojciech Drewek <wojciech.drewek@xxxxxxxxx>
Link: https://lore.kernel.org/r/20231125060126.2328690-1-0x1207@xxxxxxxxx
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/stmicro/stmmac/mmc_core.c b/drivers/net/ethernet/stmicro/stmmac/mmc_core.c
index a57b0fa815aba..a510bac0b825b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/mmc_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/mmc_core.c
@@ -177,8 +177,10 @@
#define MMC_XGMAC_RX_DISCARD_OCT_GB 0x1b4
#define MMC_XGMAC_RX_ALIGN_ERR_PKT 0x1bc
+#define MMC_XGMAC_TX_FPE_INTR_MASK 0x204
#define MMC_XGMAC_TX_FPE_FRAG 0x208
#define MMC_XGMAC_TX_HOLD_REQ 0x20c
+#define MMC_XGMAC_RX_FPE_INTR_MASK 0x224
#define MMC_XGMAC_RX_PKT_ASSEMBLY_ERR 0x228
#define MMC_XGMAC_RX_PKT_SMD_ERR 0x22c
#define MMC_XGMAC_RX_PKT_ASSEMBLY_OK 0x230
@@ -352,6 +354,8 @@ static void dwxgmac_mmc_intr_all_mask(void __iomem *mmcaddr)
{
writel(0x0, mmcaddr + MMC_RX_INTR_MASK);
writel(0x0, mmcaddr + MMC_TX_INTR_MASK);
+ writel(MMC_DEFAULT_MASK, mmcaddr + MMC_XGMAC_TX_FPE_INTR_MASK);
+ writel(MMC_DEFAULT_MASK, mmcaddr + MMC_XGMAC_RX_FPE_INTR_MASK);
writel(MMC_DEFAULT_MASK, mmcaddr + MMC_XGMAC_RX_IPC_INTR_MASK);
}
