[PATCH 4.2.y-ckt 88/98] be2net: Don't leak iomapped memory on removal.

Kamal Mostafa
2016-03-15T23:31:22Z

From: Douglas Miller <dougmill@linux.vnet.ibm.com>

commit a69bf3c5b49ef488970c74e26ba0ec12f08491c2 upstream.

The adapter->pcicfg resource is either mapped via pci_iomap() or
derived from adapter->db. During be_remove() this resource was ignored
and so could remain mapped after remove.

Add a flag to track whether adapter->pcicfg was mapped or not, then
use that flag in be_unmap_pci_bars() to unmap if required.

Fixes: 25848c901 ("use PCI MMIO read instead of config read for errors")

Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
drivers/net/ethernet/emulex/benet/be.h | 1 +
drivers/net/ethernet/emulex/benet/be_main.c | 4 ++++
2 files changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index 8d12b41..3c53d7f 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -527,6 +527,7 @@ struct be_adapter {

struct delayed_work be_err_detection_work;
u8 err_flags;
+ bool pcicfg_mapped; /* pcicfg obtained via pci_iomap() */
u32 flags;
u32 cmd_privileges;
/* Ethtool knobs and info */
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 6ca693b..8dbec20 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -5481,6 +5481,8 @@ static void be_unmap_pci_bars(struct be_adapter *adapter)
pci_iounmap(adapter->pdev, adapter->csr);
if (adapter->db)
pci_iounmap(adapter->pdev, adapter->db);
+ if (adapter->pcicfg && adapter->pcicfg_mapped)
+ pci_iounmap(adapter->pdev, adapter->pcicfg);
}

static int db_bar(struct be_adapter *adapter)
@@ -5532,8 +5534,10 @@ static int be_map_pci_bars(struct be_adapter *adapter)
if (!addr)
goto pci_map_err;
adapter->pcicfg = addr;
+ adapter->pcicfg_mapped = true;
} else {
adapter->pcicfg = adapter->db + SRIOV_VF_PCICFG_OFFSET;
+ adapter->pcicfg_mapped = false;
}
}

--
2.7.0