Rahul Lakkireddy 3822d0670c cxgb4: avoid link re-train during TC-MQPRIO configuration ... When configuring TC-MQPRIO offload, only turn off netdev carrier and don't bring physical link down in hardware. Otherwise, when the physical link is brought up again after configuration, it gets re-trained and stalls ongoing traffic. Also, when firmware is no longer accessible or crashed, avoid sending FLOWC and waiting for reply that will never come. Fix following hung_task_timeout_secs trace seen in these cases. INFO: task tc:20807 blocked for more than 122 seconds. Tainted: G S 5.13.0-rc3+ #122 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:tc state:D stack:14768 pid:20807 ppid: 19366 flags:0x00000000 Call Trace: __schedule+0x27b/0x6a0 schedule+0x37/0xa0 schedule_preempt_disabled+0x5/0x10 __mutex_lock.isra.14+0x2a0/0x4a0 ? netlink_lookup+0x120/0x1a0 ? rtnl_fill_ifinfo+0x10f0/0x10f0 __netlink_dump_start+0x70/0x250 rtnetlink_rcv_msg+0x28b/0x380 ? rtnl_fill_ifinfo+0x10f0/0x10f0 ? rtnl_calcit.isra.42+0x120/0x120 netlink_rcv_skb+0x4b/0xf0 netlink_unicast+0x1a0/0x280 netlink_sendmsg+0x216/0x440 sock_sendmsg+0x56/0x60 __sys_sendto+0xe9/0x150 ? handle_mm_fault+0x6d/0x1b0 ? do_user_addr_fault+0x1c5/0x620 __x64_sys_sendto+0x1f/0x30 do_syscall_64+0x3c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7f73218321 RSP: 002b:00007ffd19626208 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000055b7c0a8b240 RCX: 00007f7f73218321 RDX: 0000000000000028 RSI: 00007ffd19626210 RDI: 0000000000000003 RBP: 000055b7c08680ff R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000055b7c085f5f6 R13: 000055b7c085f60a R14: 00007ffd19636470 R15: 00007ffd196262a0 Fixes: b1396c2bd6 ("cxgb4: parse and configure TC-MQPRIO offload") Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2021-06-04 14:45:13 -07:00
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cxgb	chelsio: cxgb: Disable the card on error in threaded interrupt	2021-02-03 17:41:01 -08:00
cxgb3	cxgb3: fix error return code in t3_sge_alloc_qset()	2020-12-02 18:03:53 -08:00
cxgb4	cxgb4: avoid link re-train during TC-MQPRIO configuration	2021-06-04 14:45:13 -07:00
cxgb4vf	net: don't include ethtool.h from netdevice.h	2020-11-23 17:27:04 -08:00
inline_crypto	cxgb4/ch_ktls: Clear resources when pf4 device is removed	2021-05-13 15:44:54 -07:00
libcxgb	net/chelsio: Delete drive and module versions	2020-03-03 17:54:54 -08:00
Kconfig	cxgb4: Fix build failure when CONFIG_TLS=m	2020-11-21 13:10:18 -08:00
Makefile	chelsio/chtls: separate chelsio tls driver from crypto driver	2020-08-21 14:15:15 -07:00