Sankararaman Jayaraman 3f1baa91a1 vmxnet3: Fix tx queue race condition with XDP ... If XDP traffic runs on a CPU which is greater than or equal to the number of the Tx queues of the NIC, then vmxnet3_xdp_get_tq() always picks up queue 0 for transmission as it uses reciprocal scale instead of simple modulo operation. vmxnet3_xdp_xmit() and vmxnet3_xdp_xmit_frame() use the above returned queue without any locking which can lead to race conditions when multiple XDP xmits run in parallel on different CPU's. This patch uses a simple module scheme when the current CPU equals or exceeds the number of Tx queues on the NIC. It also adds locking in vmxnet3_xdp_xmit() and vmxnet3_xdp_xmit_frame() functions. Fixes: 54f00cce11 ("vmxnet3: Add XDP support.") Signed-off-by: Sankararaman Jayaraman <sankararaman.jayaraman@broadcom.com> Signed-off-by: Ronak Doshi <ronak.doshi@broadcom.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20250131042340.156547-1-sankararaman.jayaraman@broadcom.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2025-02-01 17:17:32 -08:00
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Makefile	vmxnet3: prepare for version 9 changes	2024-06-05 15:56:47 -07:00
upt1_defs.h	vmxnet3: prepare for version 7 changes	2022-06-09 12:42:00 +02:00
vmxnet3_defs.h	vmxnet3: add command to allow disabling of offloads	2024-06-05 15:56:48 -07:00
vmxnet3_drv.c	vmxnet3: support higher link speeds from vmxnet3 v9	2024-10-07 17:04:41 -07:00
vmxnet3_ethtool.c	vmxnet3: prepare for version 9 changes	2024-06-05 15:56:47 -07:00
vmxnet3_int.h	vmxnet3: update to version 9	2024-06-05 15:56:48 -07:00
vmxnet3_xdp.c	vmxnet3: Fix tx queue race condition with XDP	2025-02-01 17:17:32 -08:00
vmxnet3_xdp.h	vmxnet3: Add XDP support.	2023-08-14 08:03:52 +01:00