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From: Bob Pearson <rpearsonhpe@gmail.com>
To: jgg@nvidia.com, zyjzyj2000@gmail.com, lizhijian@fujitsu.com,
	jhack@hpe.com, linux-rdma@vger.kernel.org
Cc: Bob Pearson <rpearsonhpe@gmail.com>
Subject: [PATCH v5 for-next 1/2] RDMA/rxe: Set pd early in mr alloc routines
Date: Fri,  5 Aug 2022 13:35:24 -0500	[thread overview]
Message-ID: <20220805183523.32044-1-rpearsonhpe@gmail.com> (raw)

Move setting of pd in mr objects ahead of any possible errors
so that it will always be set in rxe_mr_complete() to avoid
seg faults when rxe_put(mr_pd(mr)) is called.

Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
---
 drivers/infiniband/sw/rxe/rxe_loc.h   |  6 +++---
 drivers/infiniband/sw/rxe/rxe_mr.c    | 11 ++++-------
 drivers/infiniband/sw/rxe/rxe_verbs.c | 10 +++++++---
 3 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h
index 22f6cc31d1d6..c2a5c8814a48 100644
--- a/drivers/infiniband/sw/rxe/rxe_loc.h
+++ b/drivers/infiniband/sw/rxe/rxe_loc.h
@@ -64,10 +64,10 @@ int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
 
 /* rxe_mr.c */
 u8 rxe_get_next_key(u32 last_key);
-void rxe_mr_init_dma(struct rxe_pd *pd, int access, struct rxe_mr *mr);
-int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
+void rxe_mr_init_dma(int access, struct rxe_mr *mr);
+int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
 		     int access, struct rxe_mr *mr);
-int rxe_mr_init_fast(struct rxe_pd *pd, int max_pages, struct rxe_mr *mr);
+int rxe_mr_init_fast(int max_pages, struct rxe_mr *mr);
 int rxe_mr_copy(struct rxe_mr *mr, u64 iova, void *addr, int length,
 		enum rxe_mr_copy_dir dir);
 int copy_data(struct rxe_pd *pd, int access, struct rxe_dma_info *dma,
diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c
index 850b80f5ad8b..af34f198e645 100644
--- a/drivers/infiniband/sw/rxe/rxe_mr.c
+++ b/drivers/infiniband/sw/rxe/rxe_mr.c
@@ -103,17 +103,16 @@ static int rxe_mr_alloc(struct rxe_mr *mr, int num_buf)
 	return -ENOMEM;
 }
 
-void rxe_mr_init_dma(struct rxe_pd *pd, int access, struct rxe_mr *mr)
+void rxe_mr_init_dma(int access, struct rxe_mr *mr)
 {
 	rxe_mr_init(access, mr);
 
-	mr->ibmr.pd = &pd->ibpd;
 	mr->access = access;
 	mr->state = RXE_MR_STATE_VALID;
 	mr->type = IB_MR_TYPE_DMA;
 }
 
-int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
+int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
 		     int access, struct rxe_mr *mr)
 {
 	struct rxe_map		**map;
@@ -125,7 +124,7 @@ int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
 	int err;
 	int i;
 
-	umem = ib_umem_get(pd->ibpd.device, start, length, access);
+	umem = ib_umem_get(&rxe->ib_dev, start, length, access);
 	if (IS_ERR(umem)) {
 		pr_warn("%s: Unable to pin memory region err = %d\n",
 			__func__, (int)PTR_ERR(umem));
@@ -175,7 +174,6 @@ int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
 		}
 	}
 
-	mr->ibmr.pd = &pd->ibpd;
 	mr->umem = umem;
 	mr->access = access;
 	mr->length = length;
@@ -197,7 +195,7 @@ int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
 	return err;
 }
 
-int rxe_mr_init_fast(struct rxe_pd *pd, int max_pages, struct rxe_mr *mr)
+int rxe_mr_init_fast(int max_pages, struct rxe_mr *mr)
 {
 	int err;
 
@@ -208,7 +206,6 @@ int rxe_mr_init_fast(struct rxe_pd *pd, int max_pages, struct rxe_mr *mr)
 	if (err)
 		goto err1;
 
-	mr->ibmr.pd = &pd->ibpd;
 	mr->max_buf = max_pages;
 	mr->state = RXE_MR_STATE_FREE;
 	mr->type = IB_MR_TYPE_MEM_REG;
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index e264cf69bf55..6c13be14d723 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -903,7 +903,9 @@ static struct ib_mr *rxe_get_dma_mr(struct ib_pd *ibpd, int access)
 		return ERR_PTR(-ENOMEM);
 
 	rxe_get(pd);
-	rxe_mr_init_dma(pd, access, mr);
+	mr->ibmr.pd = ibpd;
+
+	rxe_mr_init_dma(access, mr);
 	rxe_finalize(mr);
 
 	return &mr->ibmr;
@@ -928,8 +930,9 @@ static struct ib_mr *rxe_reg_user_mr(struct ib_pd *ibpd,
 
 
 	rxe_get(pd);
+	mr->ibmr.pd = ibpd;
 
-	err = rxe_mr_init_user(pd, start, length, iova, access, mr);
+	err = rxe_mr_init_user(rxe, start, length, iova, access, mr);
 	if (err)
 		goto err3;
 
@@ -962,8 +965,9 @@ static struct ib_mr *rxe_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type,
 	}
 
 	rxe_get(pd);
+	mr->ibmr.pd = ibpd;
 
-	err = rxe_mr_init_fast(pd, max_num_sg, mr);
+	err = rxe_mr_init_fast(max_num_sg, mr);
 	if (err)
 		goto err2;
 
-- 
2.34.1


             reply	other threads:[~2022-08-05 18:35 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-05 18:35 Bob Pearson [this message]
2022-08-22  5:46 ` [PATCH v5 for-next 1/2] RDMA/rxe: Set pd early in mr alloc routines lizhijian
2022-08-31  5:48   ` Li Zhijian
2022-08-31  6:26     ` Leon Romanovsky
2022-08-31  8:05       ` Li Zhijian
2022-08-31  8:46         ` Leon Romanovsky
2022-08-31  6:31 ` Leon Romanovsky

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