linux-kernel - [PATCH] tpm_atmel: drop tpm_atmel specific fields from tpm_vendor

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Date:	Wed, 23 Mar 2016 07:10:22 +0200
From:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:	Peter Huewe <peterhuewe@....de>
Cc:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Marcel Selhorst <tpmdd@...horst.net>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	tpmdd-devel@...ts.sourceforge.net (moderated list:TPM DEVICE DRIVER),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] tpm_atmel: drop tpm_atmel specific fields from tpm_vendor_specific

Introduced a private struct tpm_atmel_priv that contains the variables
have_region and region_size that were previously located in struct
tpm_vendor_specific. These fields were only used by tpm_atmel.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
---
 drivers/char/tpm/tpm.h       |  3 ---
 drivers/char/tpm/tpm_atmel.c | 23 +++++++++++++++++++----
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 4764545..cbab4e9 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -136,9 +136,6 @@ struct tpm_vendor_specific {
 
 	int irq;
 
-	int region_size;
-	int have_region;
-
 	struct list_head list;
 	int locality;
 	unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index a48a878..affc04b 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -35,6 +35,11 @@ enum tpm_atmel_read_status {
 	ATML_STATUS_READY = 0x08
 };
 
+struct tpm_atmel_priv {
+	int region_size;
+	int have_region;
+};
+
 static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 {
 	u8 status, *hdr = buf;
@@ -136,12 +141,13 @@ static struct platform_device *pdev;
 static void atml_plat_remove(void)
 {
 	struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
+	struct tpm_atmel_priv *priv = chip->vendor.priv;
 
 	if (chip) {
 		tpm_chip_unregister(chip);
-		if (chip->vendor.have_region)
+		if (priv->have_region)
 			atmel_release_region(chip->vendor.base,
-					     chip->vendor.region_size);
+					     priv->region_size);
 		atmel_put_base_addr(chip->vendor.iobase);
 		platform_device_unregister(pdev);
 	}
@@ -163,6 +169,7 @@ static int __init init_atmel(void)
 	int have_region, region_size;
 	unsigned long base;
 	struct  tpm_chip *chip;
+	struct tpm_atmel_priv *priv;
 
 	rc = platform_driver_register(&atml_drv);
 	if (rc)
@@ -183,6 +190,15 @@ static int __init init_atmel(void)
 		goto err_rel_reg;
 	}
 
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		rc = -ENOMEM;
+		goto err_unreg_dev;
+	}
+
+	priv->have_region = have_region;
+	priv->region_size = region_size;
+
 	chip = tpmm_chip_alloc(&pdev->dev, &tpm_atmel);
 	if (IS_ERR(chip)) {
 		rc = PTR_ERR(chip);
@@ -191,8 +207,7 @@ static int __init init_atmel(void)
 
 	chip->vendor.iobase = iobase;
 	chip->vendor.base = base;
-	chip->vendor.have_region = have_region;
-	chip->vendor.region_size = region_size;
+	chip->vendor.priv = priv;
 
 	rc = tpm_chip_register(chip);
 	if (rc)
-- 
2.7.3