linux-kernel - [PATCH v3 3/4] tpm/tpm_crb: open code the crb_init into acpi

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Date:   Mon, 12 Sep 2016 16:04:20 +0300
From:   Tomas Winkler <tomas.winkler@...el.com>
To:     tpmdd-devel@...ts.sourceforge.net,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org,
        Tomas Winkler <tomas.winkler@...el.com>
Subject: [PATCH v3 3/4] tpm/tpm_crb: open code the crb_init into acpi_add

This is preparation step for implementing tpm crb
runtime pm. We need to have tpm chip allocated
and populated before we access the runtime handlers.

Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
V2: new in the series
V3: resend
 drivers/char/tpm/tpm_crb.c | 26 ++++++++++----------------
 1 file changed, 10 insertions(+), 16 deletions(-)

diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index e945177cf2c8..b0c0e2c9022b 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -265,21 +265,6 @@ static const struct tpm_class_ops tpm_crb = {
 	.req_complete_val = CRB_DRV_STS_COMPLETE,
 };
 
-static int crb_init(struct acpi_device *device, struct crb_priv *priv)
-{
-	struct tpm_chip *chip;
-
-	chip = tpmm_chip_alloc(&device->dev, &tpm_crb);
-	if (IS_ERR(chip))
-		return PTR_ERR(chip);
-
-	dev_set_drvdata(&chip->dev, priv);
-	chip->acpi_dev_handle = device->handle;
-	chip->flags = TPM_CHIP_FLAG_TPM2;
-
-	return tpm_chip_register(chip);
-}
-
 static int crb_check_resource(struct acpi_resource *ares, void *data)
 {
 	struct resource *io_res = data;
@@ -401,6 +386,7 @@ static int crb_acpi_add(struct acpi_device *device)
 {
 	struct acpi_table_tpm2 *buf;
 	struct crb_priv *priv;
+	struct tpm_chip *chip;
 	struct device *dev = &device->dev;
 	acpi_status status;
 	u32 sm;
@@ -438,11 +424,19 @@ static int crb_acpi_add(struct acpi_device *device)
 	if (rc)
 		return rc;
 
+	chip = tpmm_chip_alloc(dev, &tpm_crb);
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
+
+	dev_set_drvdata(&chip->dev, priv);
+	chip->acpi_dev_handle = device->handle;
+	chip->flags = TPM_CHIP_FLAG_TPM2;
+
 	rc  = crb_cmd_ready(dev, priv);
 	if (rc)
 		return rc;
 
-	rc = crb_init(device, priv);
+	rc = tpm_chip_register(chip);
 	if (rc)
 		crb_go_idle(dev, priv);
 
-- 
2.7.4