octeon_ep: Add missing check for ioremap

[ Upstream commit 9a36e2d44d122fe73a2a76ba73f1d50a65cf8210 ]

Add check for ioremap() and return the error if it fails in order to
guarantee the success of ioremap().

Fixes: 862cd659a6fb ("octeon_ep: Add driver framework and device initialization")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://lore.kernel.org/r/20230615033400.2971-1-jiasheng@iscas.ac.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index b45dd7f04e2131cdd1098686dc06c0f4e44e4508..8979dd05e873f731fdfee61896b03e048d620fe1 100644 (file)
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -928,6 +928,9 @@ int octep_device_setup(struct octep_device *oct)
                oct->mmio[i].hw_addr =
                        ioremap(pci_resource_start(oct->pdev, i * 2),
                                pci_resource_len(oct->pdev, i * 2));
+               if (!oct->mmio[i].hw_addr)
+                       goto unmap_prev;
+
                oct->mmio[i].mapped = 1;
        }
 
@@ -966,7 +969,9 @@ int octep_device_setup(struct octep_device *oct)
        return 0;
 
 unsupported_dev:
-       for (i = 0; i < OCTEP_MMIO_REGIONS; i++)
+       i = OCTEP_MMIO_REGIONS;
+unmap_prev:
+       while (i--)
                iounmap(oct->mmio[i].hw_addr);
 
        kfree(oct->conf);