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| author | Boshi Yu <boshiyu@linux.alibaba.com> | 2024-12-26 16:41:11 +0800 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2024-12-30 13:42:52 -0500 |
| commit | a6c346760a52afaf7d75991c16ee4d70d6270d06 (patch) | |
| tree | 613f2c04c9e99fcff074d1da790754facbc61c71 /drivers | |
| parent | 26981e688ca896e9310e1918d104a79cb140ce85 (diff) | |
| download | linux-next-a6c346760a52afaf7d75991c16ee4d70d6270d06.tar.gz linux-next-a6c346760a52afaf7d75991c16ee4d70d6270d06.zip | |
RDMA/erdma: Support create_ah/destroy_ah in non-sleepable contexts
The RDMA CM module might invoke erdma_create_ah() or erdma_destroy_ah()
in a non-sleepable context. Both of these functions will call the
erdma_post_cmd_wait(), which can potentially sleep and occasionally lead
to a hard lockup. Therefore, post the create_ah and destroy_ah commands in
polling mode if the RDMA_CREATE_AH_SLEEPABLE and RDMA_DESTROY_AH_SLEEPABLE
flags are not set, respectively.
Reviewed-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Boshi Yu <boshiyu@linux.alibaba.com>
Link: https://patch.msgid.link/20241226084141.74823-5-boshiyu@linux.alibaba.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/hw/erdma/erdma_verbs.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c index 0e8a13577fdc..af36a8d2df22 100644 --- a/drivers/infiniband/hw/erdma/erdma_verbs.c +++ b/drivers/infiniband/hw/erdma/erdma_verbs.c @@ -2219,7 +2219,7 @@ int erdma_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, erdma_set_av_cfg(&req.av_cfg, &ah->av); ret = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL, - true); + init_attr->flags & RDMA_CREATE_AH_SLEEPABLE); if (ret) { erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_AH], ah->ahn); return ret; @@ -2243,7 +2243,7 @@ int erdma_destroy_ah(struct ib_ah *ibah, u32 flags) req.ahn = ah->ahn; ret = erdma_post_cmd_wait(&dev->cmdq, &req, sizeof(req), NULL, NULL, - true); + flags & RDMA_DESTROY_AH_SLEEPABLE); if (ret) return ret; |