Revert "EISA: Initialize device before its resources"

commit 765ee51f9a3f652959b4c7297d198a28e37952b4 upstream.

This reverts commit 26abfeed4341872364386c6a52b9acef8c81a81a.

In the eisa_probe() force_probe path, if we were unable to request slot
resources (e.g., [io 0x800-0x8ff]), we skipped the slot with "Cannot
allocate resource for EISA slot %d" before reading the EISA signature in
eisa_init_device().

Commit 26abfeed4341 moved eisa_init_device() earlier, so we tried to read
the EISA signature before requesting the slot resources, and this caused
hangs during boot.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1251816
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/eisa/eisa-bus.c b/drivers/eisa/eisa-bus.c
index 272a3ec..0314dde 100644 (file)
--- a/drivers/eisa/eisa-bus.c
+++ b/drivers/eisa/eisa-bus.c
@@ -275,11 +275,13 @@ static int __init eisa_request_resources(struct eisa_root_device *root,
                }
                
                if (slot) {
+                       edev->res[i].name  = NULL;
                        edev->res[i].start = SLOT_ADDRESS(root, slot)
                                             + (i * 0x400);
                        edev->res[i].end   = edev->res[i].start + 0xff;
                        edev->res[i].flags = IORESOURCE_IO;
                } else {
+                       edev->res[i].name  = NULL;
                        edev->res[i].start = SLOT_ADDRESS(root, slot)
                                             + EISA_VENDOR_ID_OFFSET;
                        edev->res[i].end   = edev->res[i].start + 3;
@@ -326,19 +328,20 @@ static int __init eisa_probe(struct eisa_root_device *root)
                return -ENOMEM;
        }
                
-       if (eisa_init_device(root, edev, 0)) {
+       if (eisa_request_resources(root, edev, 0)) {
+               dev_warn(root->dev,
+                        "EISA: Cannot allocate resource for mainboard\n");
                kfree(edev);
                if (!root->force_probe)
-                       return -ENODEV;
+                       return -EBUSY;
                goto force_probe;
        }
 
-       if (eisa_request_resources(root, edev, 0)) {
-               dev_warn(root->dev,
-                        "EISA: Cannot allocate resource for mainboard\n");
+       if (eisa_init_device(root, edev, 0)) {
+               eisa_release_resources(edev);
                kfree(edev);
                if (!root->force_probe)
-                       return -EBUSY;
+                       return -ENODEV;
                goto force_probe;
        }
 
@@ -361,11 +364,6 @@ static int __init eisa_probe(struct eisa_root_device *root)
                        continue;
                }
 
-               if (eisa_init_device(root, edev, i)) {
-                       kfree(edev);
-                       continue;
-               }
-
                if (eisa_request_resources(root, edev, i)) {
                        dev_warn(root->dev,
                                 "Cannot allocate resource for EISA slot %d\n",
@@ -374,6 +372,12 @@ static int __init eisa_probe(struct eisa_root_device *root)
                        continue;
                }
 
+               if (eisa_init_device(root, edev, i)) {
+                       eisa_release_resources(edev);
+                       kfree(edev);
+                       continue;
+               }
+
                if (edev->state == (EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED))
                        enabled_str = " (forced enabled)";
                else if (edev->state == EISA_CONFIG_FORCED)