** Description changed: + [Impact] + + We are working on a IoT project, when we run the uc20 on the hardware, + a lot of warning calltrace will be printed out on the console. + + + [Fix] + Backport one patch from upstream. + + [Test] + Boot the patched kernel on the machine, check dmesg, there is no + that calltrace anymore. And manually test it with + "ethtool -s eth0 wol d", it will not introduce calltrace any longer. + + + [Where problems could occur] + The change only impacts the ethertool wol function on ethernet stmmac, + if it could introduce any regression, it will be on wol function of + stmmac driver, but the risk of regression is very low, and we tested + the wol with "ethtool -s eth0 wol g" and "ethtool -s eth0 wol d", the + test result is positive. + + + When we boot uc20 on an arm64 platform with stmmac ethernet, the kernel will print the calltrace as below periodically: [ 31.617426] ------------[ cut here ]------------ [ 31.622053] Unbalanced IRQ 46 wake disable [ 31.626164] WARNING: CPU: 1 PID: 516 at kernel/irq/manage.c:754 irq_set_irq_wake+0x100/0x140 [ 31.634598] Modules linked in: crct10dif_ce [ 31.638785] CPU: 1 PID: 516 Comm: ethtool Not tainted 5.4.70+g7905bd7680f1c #1 [ 31.646002] Hardware name: NXP i.MX8MPlus EVK board (DT) [ 31.651312] pstate: 40000085 (nZcv daIf -PAN -UAO) [ 31.656100] pc : irq_set_irq_wake+0x100/0x140 [ 31.660454] lr : irq_set_irq_wake+0x100/0x140 [ 31.664806] sp : ffff80001230baa0 [ 31.668118] x29: ffff80001230baa0 x28: ffff000077900e00 [ 31.673427] x27: 0000000000000000 x26: 0000000000000000 [ 31.678736] x25: 0000000056000000 x24: 0001708000004bb3 [ 31.684046] x23: 0000000000000000 x22: 00000000ffffffea [ 31.689355] x21: 000000000000002e x20: ffff000077900e00 [ 31.694666] x19: ffff00007a3d6c00 x18: 0000000000000010 [ 31.699976] x17: 0000000000000000 x16: 0000000000000000 [ 31.705285] x15: ffff000077901270 x14: ffffffffffffffff [ 31.710594] x13: ffff80009230b7f7 x12: ffff80001230b7ff [ 31.715903] x11: ffff800011bc2000 x10: ffff800011cf9328 [ 31.721212] x9 : 0000000000000000 x8 : ffff800011cfa000 [ 31.726522] x7 : ffff8000106b0a28 x6 : 00000000000001de [ 31.731831] x5 : ffff00007ddb8180 x4 : 0000000000000001 [ 31.737140] x3 : ffff00007ddb8180 x2 : 0000000000000007 [ 31.742449] x1 : 291194bbee99b600 x0 : 0000000000000000 [ 31.747759] Call trace: [ 31.750203] irq_set_irq_wake+0x100/0x140 [ 31.754212] stmmac_set_wol+0x7c/0xf0 [ 31.757872] dev_ethtool+0xaa0/0x1fa0 [ 31.761534] dev_ioctl+0x240/0x3a0 [ 31.764935] sock_do_ioctl+0xfc/0x2b0 [ 31.768593] sock_ioctl+0x264/0x528 [ 31.772080] do_vfs_ioctl+0x964/0xb48 [ 31.775739] ksys_ioctl+0x78/0xa8 [ 31.779052] __arm64_sys_ioctl+0x1c/0xb8 [ 31.782974] el0_svc_common.constprop.0+0x68/0x160 [ 31.787762] el0_svc_handler+0x20/0x80 [ 31.791509] el0_svc+0x8/0x208 [ 31.794561] ---[ end trace fd95e8037ff0ec09 ]---
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2095376 Title: net: stmmac: kernel continually prints wol unbalance irq warning To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2095376/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
