add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/pcmcia/yenta_socket.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Regular cardbus driver ("yenta_socket")
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  *
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@@ -172,20 +173,19 @@
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 static ssize_t show_yenta_registers(struct device *yentadev, struct device_attribute *attr, char *buf)
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 {
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-	struct pci_dev *dev = to_pci_dev(yentadev);
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-	struct yenta_socket *socket = pci_get_drvdata(dev);
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+	struct yenta_socket *socket = dev_get_drvdata(yentadev);
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 	int offset = 0, i;
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 	offset = snprintf(buf, PAGE_SIZE, "CB registers:");
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 	for (i = 0; i < 0x24; i += 4) {
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 		unsigned val;
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 		if (!(i & 15))
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-			offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
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+			offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
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 		val = cb_readl(socket, i);
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-		offset += snprintf(buf + offset, PAGE_SIZE - offset, " %08x", val);
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+		offset += scnprintf(buf + offset, PAGE_SIZE - offset, " %08x", val);
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 	}
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-	offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:");
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+	offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:");
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 	for (i = 0; i < 0x45; i++) {
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 		unsigned char val;
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 		if (!(i & 7)) {
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@@ -193,10 +193,10 @@
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 				memcpy(buf + offset, " -", 2);
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 				offset += 2;
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 			} else
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-				offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
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+				offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
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 		}
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 		val = exca_readb(socket, i);
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-		offset += snprintf(buf + offset, PAGE_SIZE - offset, " %02x", val);
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+		offset += scnprintf(buf + offset, PAGE_SIZE - offset, " %02x", val);
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 	}
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 	buf[offset++] = '\n';
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 	return offset;
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@@ -694,7 +694,7 @@
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 	struct pci_bus_region region;
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 	unsigned mask;
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-	res = dev->resource + PCI_BRIDGE_RESOURCES + nr;
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+	res = &dev->resource[nr];
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 	/* Already allocated? */
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 	if (res->parent)
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 		return 0;
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@@ -711,7 +711,7 @@
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 	region.end = config_readl(socket, addr_end) | ~mask;
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 	if (region.start && region.end > region.start && !override_bios) {
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 		pcibios_bus_to_resource(dev->bus, res, &region);
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-		if (pci_claim_resource(dev, PCI_BRIDGE_RESOURCES + nr) == 0)
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+		if (pci_claim_resource(dev, nr) == 0)
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 			return 0;
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 		dev_info(&dev->dev,
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 			 "Preassigned resource %d busy or not available, reconfiguring...\n",
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@@ -745,19 +745,35 @@
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 	return 0;
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 }
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+static void yenta_free_res(struct yenta_socket *socket, int nr)
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+{
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+	struct pci_dev *dev = socket->dev;
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+	struct resource *res;
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+
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+	res = &dev->resource[nr];
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+	if (res->start != 0 && res->end != 0)
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+		release_resource(res);
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+
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+	res->start = res->end = res->flags = 0;
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+}
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+
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 /*
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  * Allocate the bridge mappings for the device..
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  */
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 static void yenta_allocate_resources(struct yenta_socket *socket)
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 {
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 	int program = 0;
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-	program += yenta_allocate_res(socket, 0, IORESOURCE_IO,
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+	program += yenta_allocate_res(socket, PCI_CB_BRIDGE_IO_0_WINDOW,
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+			   IORESOURCE_IO,
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 			   PCI_CB_IO_BASE_0, PCI_CB_IO_LIMIT_0);
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-	program += yenta_allocate_res(socket, 1, IORESOURCE_IO,
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+	program += yenta_allocate_res(socket, PCI_CB_BRIDGE_IO_1_WINDOW,
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+			   IORESOURCE_IO,
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 			   PCI_CB_IO_BASE_1, PCI_CB_IO_LIMIT_1);
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-	program += yenta_allocate_res(socket, 2, IORESOURCE_MEM|IORESOURCE_PREFETCH,
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+	program += yenta_allocate_res(socket, PCI_CB_BRIDGE_MEM_0_WINDOW,
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+			   IORESOURCE_MEM | IORESOURCE_PREFETCH,
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 			   PCI_CB_MEMORY_BASE_0, PCI_CB_MEMORY_LIMIT_0);
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-	program += yenta_allocate_res(socket, 3, IORESOURCE_MEM,
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+	program += yenta_allocate_res(socket, PCI_CB_BRIDGE_MEM_1_WINDOW,
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+			   IORESOURCE_MEM,
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 			   PCI_CB_MEMORY_BASE_1, PCI_CB_MEMORY_LIMIT_1);
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 	if (program)
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 		pci_setup_cardbus(socket->dev->subordinate);
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@@ -769,14 +785,10 @@
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  */
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 static void yenta_free_resources(struct yenta_socket *socket)
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 {
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-	int i;
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-	for (i = 0; i < 4; i++) {
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-		struct resource *res;
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-		res = socket->dev->resource + PCI_BRIDGE_RESOURCES + i;
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-		if (res->start != 0 && res->end != 0)
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-			release_resource(res);
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-		res->start = res->end = res->flags = 0;
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-	}
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+	yenta_free_res(socket, PCI_CB_BRIDGE_IO_0_WINDOW);
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+	yenta_free_res(socket, PCI_CB_BRIDGE_IO_1_WINDOW);
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+	yenta_free_res(socket, PCI_CB_BRIDGE_MEM_0_WINDOW);
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+	yenta_free_res(socket, PCI_CB_BRIDGE_MEM_1_WINDOW);
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 }
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