In bnxt_qplib_alloc_res, it calls bnxt_qplib_alloc_dpi_tbl().
Inside bnxt_qplib_alloc_dpi_tbl, dpit->dbr_bar_reg_iomem is freed via
pci_iounmap() in unmap_io error branch. After the callee returns err code,
bnxt_qplib_alloc_res calls bnxt_qplib_free_res()->bnxt_qplib_free_dpi_tbl()
in fail branch. Then dpit->dbr_bar_reg_iomem is freed in the second time by
pci_iounmap().
My patch set dpit->dbr_bar_reg_iomem to NULL after it is freed by pci_iounmap()
in the first time, to avoid the double free.
Fixes: 1ac5a40479752 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Signed-off-by: Lv Yunlong <lyl2019@xxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/bnxt_re/qplib_res.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c
index fa7878336100..3ca47004b752 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_res.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c
@@ -854,6 +854,7 @@ static int bnxt_qplib_alloc_dpi_tbl(struct bnxt_qplib_res *res,
unmap_io:
pci_iounmap(res->pdev, dpit->dbr_bar_reg_iomem);
+ dpit->dbr_bar_reg_iomem = NULL;
return -ENOMEM;
}
--
2.25.1
