cnss2: set high 32bit of MSI addr only when device is 64 bit capable

If EP is 32bit MSI capable, then MSI address is 4 bytes. Platform
driver check MSI capability before read MSI address.

Change-Id: I8157b7ba2c9ed2a8d93f168f893cf1a2e6bb50b6
Signed-off-by: Kai Liu <kaliu@codeaurora.org>

drivers/net/wireless/cnss2/pci.c

@@ -2439,12 +2439,19 @@ void cnss_get_msi_address(struct device *dev, u32 *msi_addr_low,
 			  u32 *msi_addr_high)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
+	u16 control;
 
+	pci_read_config_word(pci_dev, pci_dev->msi_cap + PCI_MSI_FLAGS,
+			     &control);
 	pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_LO,
 			      msi_addr_low);
-
-	pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_HI,
-			      msi_addr_high);
+	/*return msi high addr only when device support 64 BIT MSI */
+	if (control & PCI_MSI_FLAGS_64BIT)
+		pci_read_config_dword(pci_dev,
+				      pci_dev->msi_cap + PCI_MSI_ADDRESS_HI,
+				      msi_addr_high);
+	else
+		*msi_addr_high = 0;
 }
 EXPORT_SYMBOL(cnss_get_msi_address);