mirror of https://gitee.com/openkylin/linux.git
3eb1a40f4b
This change is meant to address several race issues that become possible because next_to_watch could possibly be set to a value that shows that the descriptor is done when it is not. In order to correct that we instead make next_to_watch a pointer that is set to NULL during cleanup, and set to the eop_desc after the descriptor rings have been written. To enforce proper ordering the next_to_watch pointer is not set until after a wmb writing the values to the last descriptor in a transmit. In order to guarantee that the descriptor is not read until after the eop_desc we use the read_barrier_depends which is only really necessary on the alpha architecture. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Acked-by: Greg Rose <gregory.v.rose@intel.com> Tested-by: Sibai Li <sibai.li@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> |
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| .. | ||
| Makefile | ||
| defines.h | ||
| ethtool.c | ||
| igbvf.h | ||
| mbx.c | ||
| mbx.h | ||
| netdev.c | ||
| regs.h | ||
| vf.c | ||
| vf.h | ||