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Code Issues Releases Wiki Activity

IB/iser: Fix error flow in case of registration failure 

During READ/WRITE preparation, in case of failure in memory registration
using iser_reg_mem_fastreg we must unmap previously mapped iser task.

Link: https://lore.kernel.org/r/20220308145546.8372-5-mgurtovoy@nvidia.com
Reviewed-by: Sergey Gorenko <sergeygo@nvidia.com>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Max Gurtovoy 2022-03-08 16:55:46 +02:00 committed by Jason Gunthorpe
parent 80303ee244
commit 2e11a5e459
1 changed files with 11 additions and 3 deletions
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14
drivers/infiniband/ulp/iser/iser_initiator.c
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@ -62,7 +62,7 @@ static int iser_prepare_read_cmd(struct iscsi_task *task)
err = iser_reg_mem_fastreg(iser_task, ISER_DIR_IN, false);
if (err) {
iser_err("Failed to set up Data-IN RDMA\n");
return err;
goto out_err;
}
mem_reg = &iser_task->rdma_reg[ISER_DIR_IN];
@ -75,6 +75,10 @@ static int iser_prepare_read_cmd(struct iscsi_task *task)
(unsigned long long)mem_reg->sge.addr);
return 0;
out_err:
iser_dma_unmap_task_data(iser_task, ISER_DIR_IN, DMA_FROM_DEVICE);
return err;
}
/* Register user buffer memory and initialize passive rdma
@ -100,9 +104,9 @@ static int iser_prepare_write_cmd(struct iscsi_task *task, unsigned int imm_sz,
err = iser_reg_mem_fastreg(iser_task, ISER_DIR_OUT,
buf_out->data_len == imm_sz);
if (err != 0) {
if (err) {
iser_err("Failed to register write cmd RDMA mem\n");
return err;
goto out_err;
}
mem_reg = &iser_task->rdma_reg[ISER_DIR_OUT];
@ -129,6 +133,10 @@ static int iser_prepare_write_cmd(struct iscsi_task *task, unsigned int imm_sz,
}
return 0;
out_err:
iser_dma_unmap_task_data(iser_task, ISER_DIR_OUT, DMA_TO_DEVICE);
return err;
}
/* creates a new tx descriptor and adds header regd buffer */