[PATCH] Cyclades driver region cleanup

drivers/char/cyclades.c

@@ -4965,6 +4965,8 @@ cy_detect_pci(void)
   uclong		Ze_addr0[NR_CARDS], Ze_addr2[NR_CARDS], ZeIndex = 0;
   uclong		Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
   unsigned char         Ze_irq[NR_CARDS];
+  struct resource *resource;
+  unsigned long res_start, res_len;
 
         for (i = 0; i < NR_CARDS; i++) {
                 /* look for a Cyclades card by vendor and device id */
@@ -5012,7 +5014,15 @@ cy_detect_pci(void)
 		/* Although we don't use this I/O region, we should
 		   request it from the kernel anyway, to avoid problems
 		   with other drivers accessing it. */
-		request_region(cy_pci_phys1, CyPCI_Yctl, "Cyclom-Y");
+		resource = request_region(cy_pci_phys1,
+					CyPCI_Yctl, "Cyclom-Y");
+		if (resource == NULL) {
+			printk(KERN_ERR "cyclades: failed to allocate IO "
+					"resource at 0x%lx\n", cy_pci_phys1);
+			continue;
+		}
+		res_start = cy_pci_phys1;
+		res_len = CyPCI_Yctl;
 
 #if defined(__alpha__)
                 if (device_id  == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
@@ -5083,6 +5093,10 @@ cy_detect_pci(void)
                 cy_card[j].bus_index = 1;
                 cy_card[j].first_line = cy_next_channel;
                 cy_card[j].num_chips = cy_pci_nchan/4;
+		cy_card[j].resource = resource;
+		cy_card[j].res_start = res_start;
+		cy_card[j].res_len = res_len;
+		resource = NULL;	/* For next card */
 	
                 /* enable interrupts in the PCI interface */
 		plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
@@ -5162,7 +5176,15 @@ cy_detect_pci(void)
 		/* Although we don't use this I/O region, we should
 		   request it from the kernel anyway, to avoid problems
 		   with other drivers accessing it. */
-		request_region(cy_pci_phys1, CyPCI_Zctl, "Cyclades-Z");
+		resource = request_region(cy_pci_phys1,
+				CyPCI_Zctl, "Cyclades-Z");
+		if (resource == NULL) {
+			printk(KERN_ERR "cyclades: failed ot allocate IO resource "
+					"at 0x%lx\n", cy_pci_phys1);
+			continue;
+		}
+		res_start = cy_pci_phys1;
+		res_len = CyPCI_Zctl;
 	
 		if (mailbox == ZE_V1) {
 		    cy_pci_addr2 = (ulong)ioremap(cy_pci_phys2, CyPCI_Ze_win);
@@ -5261,6 +5283,10 @@ cy_detect_pci(void)
                 cy_card[j].bus_index = 1;
                 cy_card[j].first_line = cy_next_channel;
                 cy_card[j].num_chips = -1;
+		cy_card[j].resource = resource;
+		cy_card[j].res_start = res_start;
+		cy_card[j].res_len = res_len;
+		resource = NULL;	/* For next card */
 
                 /* print message */
 #ifdef CONFIG_CYZ_INTR
@@ -5787,6 +5813,8 @@ cy_cleanup_module(void)
 #endif /* CONFIG_CYZ_INTR */
 	    )
 		free_irq(cy_card[i].irq, &cy_card[i]);
+		if (cy_card[i].resource)
+			release_region(cy_card[i].res_start, cy_card[i].res_len);
         }
     }
     if (tmp_buf) {