diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2014-01-17 14:57:29 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-13 13:47:59 -0800 |
| commit | 329f4557c93a1aa769896155deefa363f01283e5 (patch) | |
| tree | 3030be3494ace17dc5478e0f1234a037ff4d485c /drivers | |
| parent | 32df365df6fe849e54101681b8278ff6a8d7482b (diff) | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/eisa/eisa-bus.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/eisa/eisa-bus.c b/drivers/eisa/eisa-bus.c index 272a3ec3595..0314dde18a5 100644 --- 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) |