Subject: linux-next: manual merge of the char-misc tree with the tpmdd tree

From: Stephen Rothwell <[email-masked]>
Date: Wed, 22 Mar 2017 13:13:19 +1100

Hi all,

Today's linux-next merge of the char-misc tree got a conflict in:

  drivers/char/tpm/tpm-chip.c

between commit:

  d7a97c3e6592 ("tpm: Use the right clean up after cdev_add completes")
  5f6b4fbc12c8 ("tpm: infrastructure for TPM spaces")
  1b50e13284d7 ("tpm: expose spaces via a device link /dev/tpmrm<n>")
  849246e7ce9c ("tpm2: add session handle context saving and restoring to the space code")

from the tpmdd tree and commits:

  8dbbf5825181 ("tpm-chip: utilize new cdev_device_add helper function")

from the char-misc tree.

I fixed it up (I hope, see below) and can carry the fix as necessary.
This is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/char/tpm/tpm-chip.c
index 27a76e706cfd,935f0e92ad61..000000000000
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@@ -214,22 -186,7 +214,20 @@@ struct tpm_chip *tpm_chip_alloc(struct 
  		chip->flags |= TPM_CHIP_FLAG_VIRTUAL;
  
  	cdev_init(&chip->cdev, &tpm_fops);
 +	cdev_init(&chip->cdevs, &tpmrm_fops);
  	chip->cdev.owner = THIS_MODULE;
 +	chip->cdevs.owner = THIS_MODULE;
- 	chip->cdev.kobj.parent = &chip->dev.kobj;
- 	chip->cdevs.kobj.parent = &chip->devs.kobj;
 +
 +	chip->work_space.context_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
 +	if (!chip->work_space.context_buf) {
 +		rc = -ENOMEM;
 +		goto out;
 +	}
 +	chip->work_space.session_buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
 +	if (!chip->work_space.session_buf) {
 +		rc = -ENOMEM;
 +		goto out;
 +	}
  
  	return chip;
  
@@@ -269,69 -225,17 +267,44 @@@ struct tpm_chip *tpmm_chip_alloc(struc
  }
  EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
  
- static void tpm_del_char_device(struct tpm_chip *chip, bool with_device)
++static void tpm_del_char_device(struct tpm_chip *chip)
 +{
- 	cdev_del(&chip->cdev);
- 	if (with_device) {
- 		device_del(&chip->dev);
- 
- 		/* Make the chip unavailable. */
- 		mutex_lock(&idr_lock);
- 		idr_replace(&dev_nums_idr, NULL, chip->dev_num);
- 		mutex_unlock(&idr_lock);
- 	}
++	cdev_device_del(&chip->cdev, &chip->dev);
++
++	/* Make the chip unavailable. */
++	mutex_lock(&idr_lock);
++	idr_replace(&dev_nums_idr, NULL, chip->dev_num);
++	mutex_unlock(&idr_lock);
 +
 +	/* Make the driver uncallable. */
 +	down_write(&chip->ops_sem);
 +	if (chip->flags & TPM_CHIP_FLAG_TPM2)
 +		tpm2_shutdown(chip, TPM2_SU_CLEAR);
 +	chip->ops = NULL;
 +	up_write(&chip->ops_sem);
 +}
 +
  static int tpm_add_char_device(struct tpm_chip *chip)
  {
  	int rc;
  
- 	rc = cdev_add(&chip->cdev, chip->dev.devt, 1);
- 	if (rc) {
- 		dev_err(&chip->dev,
- 			"unable to cdev_add() %s, major %d, minor %d, err=%d\n",
- 			dev_name(&chip->dev), MAJOR(chip->dev.devt),
- 			MINOR(chip->dev.devt), rc);
- 		return rc;
- 	}
- 
- 	rc = device_add(&chip->dev);
+ 	rc = cdev_device_add(&chip->cdev, &chip->dev);
  	if (rc) {
  		dev_err(&chip->dev,
- 			"unable to device_register() %s, major %d, minor %d, err=%d\n",
+ 			"unable to cdev_device_add() %s, major %d, minor %d, err=%d\n",
  			dev_name(&chip->dev), MAJOR(chip->dev.devt),
  			MINOR(chip->dev.devt), rc);
- 		tpm_del_char_device(chip, false);
 +		return rc;
 +	}
  
 +	if (chip->flags & TPM_CHIP_FLAG_TPM2)
- 		rc = cdev_add(&chip->cdevs, chip->devs.devt, 1);
++		rc = cdev_device_add(&chip->cdevs, &chip->devs);
 +	if (rc) {
 +		dev_err(&chip->dev,
- 			"unable to cdev_add() %s, major %d, minor %d, err=%d\n",
++			"unable to cdev_device_add() %s, major %d, minor %d, err=%d\n",
 +			dev_name(&chip->devs), MAJOR(chip->devs.devt),
 +			MINOR(chip->devs.devt), rc);
- 		tpm_del_char_device(chip, true);
- 		return rc;
- 	}
- 
- 	if (chip->flags & TPM_CHIP_FLAG_TPM2)
- 		rc = device_add(&chip->devs);
- 	if (rc) {
- 		dev_err(&chip->dev,
- 			"unable to device_register() %s, major %d, minor %d, err=%d\n",
- 			dev_name(&chip->devs), MAJOR(chip->devs.devt),
- 			MINOR(chip->devs.devt), rc);
- 		cdev_del(&chip->cdevs);
- 		tpm_del_char_device(chip, true);
++		tpm_del_char_device(chip);
  		return rc;
  	}
  
@@@ -450,10 -371,6 +423,8 @@@ void tpm_chip_unregister(struct tpm_chi
  {
  	tpm_del_legacy_sysfs(chip);
  	tpm_bios_log_teardown(chip);
- 	if (chip->flags & TPM_CHIP_FLAG_TPM2) {
- 		cdev_del(&chip->cdevs);
- 		device_del(&chip->devs);
- 	}
- 	tpm_del_char_device(chip, true);
++	if (chip->flags & TPM_CHIP_FLAG_TPM2)
++		cdev_device_del(&chip->cdevs, &chip->devs);
+ 	tpm_del_char_device(chip);
  }
  EXPORT_SYMBOL_GPL(tpm_chip_unregister);