[PATCH net] net: aquantia: Fix error handling in aq_pci_probe()

[Dan Carpenter]

We should check "self->aq_hw" for allocation failure, and also we should
free it on the error paths.

Fixes: 23ee07ad3c2f ("net: aquantia: Cleanup pci functions module")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c 
b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
index 22889fc158f2..87c4308b52a7 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
@@ -226,6 +226,10 @@ static int aq_pci_probe(struct pci_dev *pdev,
                goto err_ioremap;
 
        self->aq_hw = kzalloc(sizeof(*self->aq_hw), GFP_KERNEL);
+       if (!self->aq_hw) {
+               err = -ENOMEM;
+               goto err_ioremap;
+       }
        self->aq_hw->aq_nic_cfg = aq_nic_get_cfg(self);
 
        for (bar = 0; bar < 4; ++bar) {
@@ -235,19 +239,19 @@ static int aq_pci_probe(struct pci_dev *pdev,
                        mmio_pa = pci_resource_start(pdev, bar);
                        if (mmio_pa == 0U) {
                                err = -EIO;
-                               goto err_ioremap;
+                               goto err_free_aq_hw;
                        }
 
                        reg_sz = pci_resource_len(pdev, bar);
                        if ((reg_sz <= 24 /*ATL_REGS_SIZE*/)) {
                                err = -EIO;
-                               goto err_ioremap;
+                               goto err_free_aq_hw;
                        }
 
                        self->aq_hw->mmio = ioremap_nocache(mmio_pa, reg_sz);
                        if (!self->aq_hw->mmio) {
                                err = -EIO;
-                               goto err_ioremap;
+                               goto err_free_aq_hw;
                        }
                        break;
                }
@@ -255,7 +259,7 @@ static int aq_pci_probe(struct pci_dev *pdev,
 
        if (bar == 4) {
                err = -EIO;
-               goto err_ioremap;
+               goto err_free_aq_hw;
        }
 
        numvecs = min((u8)AQ_CFG_VECS_DEF,
@@ -290,6 +294,8 @@ static int aq_pci_probe(struct pci_dev *pdev,
        aq_pci_free_irq_vectors(self);
 err_hwinit:
        iounmap(self->aq_hw->mmio);
+err_free_aq_hw:
+       kfree(self->aq_hw);
 err_ioremap:
        free_netdev(ndev);
 err_pci_func: