From: Leon Romanovsky leonro@nvidia.com
stable inclusion from stable-v5.10.99 commit b3958d315163d1f5e0c6c2bff2c02d06f03e853b bugzilla: https://gitee.com/openeuler/kernel/issues/I55O7H
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit f3136c4ce7acf64bee43135971ca52a880572e32 upstream.
The failure to allocate memory during MLX4_DEV_EVENT_PORT_MGMT_CHANGE event handler will cause skip the assignment logic, but ib_dispatch_event() will be called anyway.
Fix it by calling to return instead of break after memory allocation failure.
Fixes: 00f5ce99dc6e ("mlx4: Use port management change event instead of smp_snoop") Link: https://lore.kernel.org/r/12a0e83f18cfad4b5f62654f141e240d04915e10.164362226... Signed-off-by: Leon Romanovsky leonro@nvidia.com Reviewed-by: Håkon Bugge haakon.bugge@oracle.com Signed-off-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yu Liao liaoyu15@huawei.com Reviewed-by: Wei Li liwei391@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/infiniband/hw/mlx4/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 7b11aff8a5ea..05c7200751e5 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -3273,7 +3273,7 @@ static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr, case MLX4_DEV_EVENT_PORT_MGMT_CHANGE: ew = kmalloc(sizeof *ew, GFP_ATOMIC); if (!ew) - break; + return;
INIT_WORK(&ew->work, handle_port_mgmt_change_event); memcpy(&ew->ib_eqe, eqe, sizeof *eqe);