platform/x86: intel_scu_ipc: Rearrange init sequence

Device pointer is used as a flag that everything is prepared.
Nevertheless the assignment happened quite before and there is a window
when a caller can get weird results or even crashes since not all fields
are initialized yet.

Rearrange initialization sequence in ->probe() to prepare everything
before use.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index d789fe1baf17..8a34c1e7536f 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -582,7 +582,6 @@ static int ipc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         if (!pdata)
                 return -ENODEV;
 
-        scu->dev = &pdev->dev;
         scu->irq_mode = pdata->irq_mode;
 
         err = pcim_enable_device(pdev);
@@ -595,17 +594,20 @@ static int ipc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
         init_completion(&scu->cmd_complete);
 
-        err = devm_request_irq(&pdev->dev, pdev->irq, ioc, 0, "intel_scu_ipc",
-                               scu);
-        if (err)
-                return err;
-
         scu->ipc_base = pcim_iomap_table(pdev)[0];
 
         scu->i2c_base = ioremap_nocache(pdata->i2c_base, pdata->i2c_len);
         if (!scu->i2c_base)
                 return -ENOMEM;
 
+        err = devm_request_irq(&pdev->dev, pdev->irq, ioc, 0, "intel_scu_ipc",
+                               scu);
+        if (err)
+                return err;
+
+        /* Assign device at last */
+        scu->dev = &pdev->dev;
+
         intel_scu_devices_create();
 
         pci_set_drvdata(pdev, scu);