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Commit 765ee51f authored by Bjorn Helgaas's avatar Bjorn Helgaas
Browse files

Revert "EISA: Initialize device before its resources" 

This reverts commit 26abfeed.

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 26abfeed 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: default avatarBjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org	# v3.10+ a2080d0c: Revert "EISA: Log device resources in dmesg"
parent bea1b0b3

drivers/eisa/eisa-bus.c

+15 −11
Original line number Diff line number Diff line
@@ -277,11 +277,13 @@ 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;
@@ -327,19 +329,20 @@ 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;

	}
@@ -362,11 +365,6 @@ 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",
@@ -375,6 +373,12 @@ 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)