add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/ssb/pci.c
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@@ -305,7 +305,6 @@
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 		else if (i % 2)
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 			pr_cont(".");
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 		writew(sprom[i], bus->mmio + bus->sprom_offset + (i * 2));
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-		mmiowb();
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 		msleep(20);
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 	}
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 	err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
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@@ -596,7 +595,7 @@
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 {
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 	int i;
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 	u16 o;
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-	u16 pwr_info_offset[] = {
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+	static const u16 pwr_info_offset[] = {
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 		SSB_SROM8_PWR_INFO_CORE0, SSB_SROM8_PWR_INFO_CORE1,
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 		SSB_SROM8_PWR_INFO_CORE2, SSB_SROM8_PWR_INFO_CORE3
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 	};
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@@ -1165,17 +1164,12 @@
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 int ssb_pci_init(struct ssb_bus *bus)
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 {
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 	struct pci_dev *pdev;
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-	int err;
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 	if (bus->bustype != SSB_BUSTYPE_PCI)
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 		return 0;
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 	pdev = bus->host_pci;
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 	mutex_init(&bus->sprom_mutex);
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-	err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
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-	if (err)
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-		goto out;
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-out:
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-	return err;
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+	return device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
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 }