linux-kernel - [PATCH 06/15] tpm: Remove redundant dev_set

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Date:	Tue, 22 Oct 2013 20:00:31 +0200
From:	Peter Huewe <peterhuewe@....de>
To:	james.l.morris@...cle.com, tpmdd-devel@...ts.sourceforge.net,
	adlai@...ux.vnet.ibm.com
Cc:	linux-kernel@...r.kernel.org,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Peter Huewe <peterhuewe@....de>
Subject: [PATCH 06/15] tpm: Remove redundant dev_set_drvdata

From: Jason Gunthorpe <jgunthorpe@...idianresearch.com>

TPM drivers should not call dev_set_drvdata (or aliases), only the core
code is allowed to call dev_set_drvdata, and it does it during
tpm_register_hardware.

These extra sets are harmless, but are an anti-pattern that many drivers
have copied.

Signed-off-by: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Reviewed-by: Joel Schopp <jschopp@...ux.vnet.ibm.com>
Reviewed-by: Peter Huewe <peterhuewe@....de>
Acked-by: Ashley Lai <adlai@...ux.vnet.ibm.com>
Signed-off-by: Peter Huewe <peterhuewe@....de>
---
 drivers/char/tpm/tpm_i2c_infineon.c |    2 --
 drivers/char/tpm/tpm_i2c_stm_st33.c |    2 --
 drivers/char/tpm/xen-tpmfront.c     |    2 --
 3 files changed, 0 insertions(+), 6 deletions(-)

diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index b8735de..e33d8e5 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -685,7 +685,6 @@ out_vendor:
 	chip->dev->release = NULL;
 	chip->release = NULL;
 	tpm_dev.client = NULL;
-	dev_set_drvdata(chip->dev, chip);
 out_err:
 	return rc;
 }
@@ -766,7 +765,6 @@ static int tpm_tis_i2c_remove(struct i2c_client *client)
 	chip->dev->release = NULL;
 	chip->release = NULL;
 	tpm_dev.client = NULL;
-	dev_set_drvdata(chip->dev, chip);
 
 	return 0;
 }
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 5bb8e2d..1c68d93 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -746,8 +746,6 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
 
 	tpm_get_timeouts(chip);
 
-	i2c_set_clientdata(client, chip);
-
 	dev_info(chip->dev, "TPM I2C Initialized\n");
 	return 0;
 _irq_set:
diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
index 7a7929b..9b48370 100644
--- a/drivers/char/tpm/xen-tpmfront.c
+++ b/drivers/char/tpm/xen-tpmfront.c
@@ -386,8 +386,6 @@ static int tpmfront_probe(struct xenbus_device *dev,
 
 	tpm_get_timeouts(priv->chip);
 
-	dev_set_drvdata(&dev->dev, priv->chip);
-
 	return rv;
 }
 
-- 
1.7.5.4

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