Tao Liu fae2a9fb1e linux/dim: Fix divide by 0 in RDMA DIM ... commit 0fe3dbbefb74a8575f61d7801b08dbc50523d60d upstream. Fix a divide 0 error in rdma_dim_stats_compare() when prev->cpe_ratio == 0. CallTrace: Hardware name: H3C R4900 G3/RS33M2C9S, BIOS 2.00.37P21 03/12/2020 task: ffff880194b78000 task.stack: ffffc90006714000 RIP: 0010:backport_rdma_dim+0x10e/0x240 [mlx_compat] RSP: 0018:ffff880c10e83ec0 EFLAGS: 00010202 RAX: 0000000000002710 RBX: ffff88096cd7f780 RCX: 0000000000000064 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000001d7c6c09 R13: ffff88096cd7f780 R14: ffff880b174fe800 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff880c10e80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000a0965b00 CR3: 000000000200a003 CR4: 00000000007606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <IRQ> ib_poll_handler+0x43/0x80 [ib_core] irq_poll_softirq+0xae/0x110 __do_softirq+0xd1/0x28c irq_exit+0xde/0xf0 do_IRQ+0x54/0xe0 common_interrupt+0x8f/0x8f </IRQ> ? cpuidle_enter_state+0xd9/0x2a0 ? cpuidle_enter_state+0xc7/0x2a0 ? do_idle+0x170/0x1d0 ? cpu_startup_entry+0x6f/0x80 ? start_secondary+0x1b9/0x210 ? secondary_startup_64+0xa5/0xb0 Code: 0f 87 e1 00 00 00 8b 4c 24 14 44 8b 43 14 89 c8 4d 63 c8 44 29 c0 99 31 d0 29 d0 31 d2 48 98 48 8d 04 80 48 8d 04 80 48 c1 e0 02 <49> f7 f1 48 83 f8 0a 0f 86 c1 00 00 00 44 39 c1 7f 10 48 89 df RIP: backport_rdma_dim+0x10e/0x240 [mlx_compat] RSP: ffff880c10e83ec0 Fixes: f4915455dc ("linux/dim: Implement RDMA adaptive moderation (DIM)") Link: https://lore.kernel.org/r/20220627140004.3099-1-thomas.liu@ucloud.cn Signed-off-by: Tao Liu <thomas.liu@ucloud.cn> Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com> Acked-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-07-07 17:52:17 +02:00
..
acpi	ACPICA: actypes.h: Expand the ACPI_ACCESS_ definitions	2022-01-27 10:54:18 +01:00
asm-generic	tlb: hugetlb: Add more sizes to tlb_remove_huge_tlb_entry	2022-04-20 09:23:22 +02:00
clocksource
crypto	crypto: drbg - make reseeding from get_random_bytes() synchronous	2022-06-06 08:42:42 +02:00
drm	drm: fix EDID struct for old ARM OABI format	2022-06-09 10:20:59 +02:00
dt-bindings
keys
kunit
kvm
linux	linux/dim: Fix divide by 0 in RDMA DIM	2022-07-07 17:52:17 +02:00
math-emu
media
memory	memory: renesas-rpc-if: Fix HF/OSPI data transfer in Manual Mode	2022-05-09 09:05:02 +02:00
misc
net	netfilter: nftables: add nft_parse_register_store() and use it	2022-06-29 08:59:46 +02:00
pcmcia
ras
rdma	RDMA/netlink: Add __maybe_unused to static inline in C file	2021-11-26 10:39:21 +01:00
scsi	scsi: fcoe: Fix Wstringop-overflow warnings in fcoe_wwn_from_mac()	2022-06-09 10:21:15 +02:00
soc	firmware: raspberrypi: Keep count of all consumers	2021-09-15 09:50:41 +02:00
sound	ALSA: jack: Access input_dev under mutex	2022-06-09 10:20:51 +02:00
target	scsi: target: Fix ordered tag handling	2021-11-26 10:39:11 +01:00
trace	ata: libata: add qc->flags in ata_qc_complete_template tracepoint	2022-06-29 08:59:45 +02:00
uapi	include/uapi/linux/xfrm.h: Fix XFRM_MSG_MAPPING ABI breakage	2022-05-25 09:18:02 +02:00
vdso
video
xen	xen/gnttab: fix gnttab_end_foreign_access() without page specified	2022-03-11 12:11:54 +01:00