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Date: Tue, 22 Mar 2016 10:31:54 -0600
From: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc: Peter Huewe <peterhuewe@....de>, tpmdd-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: Re: [tpmdd-devel] [PATCH] tpm: drop int_queue from
tpm_vendor_specific
On Tue, Mar 22, 2016 at 06:20:09AM +0200, Jarkko Sakkinen wrote:
> Drop field int_queue from tpm_vendor_specific as it is used only by
> tpm_tis. Probably all of the fields should be eventually dropped and
> moved to the private structures of different drivers but it is better to
> do this one step at a time in order not to break anything.
>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
> drivers/char/tpm/tpm.h | 1 -
> drivers/char/tpm/tpm_i2c_nuvoton.c | 1 -
> drivers/char/tpm/tpm_tis.c | 19 ++++++++++++-------
> 3 files changed, 12 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index f197eef..4764545 100644
> +++ b/drivers/char/tpm/tpm.h
> @@ -148,7 +148,6 @@ struct tpm_vendor_specific {
> void *priv;
>
> wait_queue_head_t read_queue;
> - wait_queue_head_t int_queue;
>
> u16 manufacturer_id;
> };
> diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
> index d61d43f..a43b5f3 100644
> +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
> @@ -540,7 +540,6 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
> return -ENOMEM;
>
> init_waitqueue_head(&chip->vendor.read_queue);
> - init_waitqueue_head(&chip->vendor.int_queue);
>
> /* Default timeouts */
> chip->vendor.timeout_a = msecs_to_jiffies(TPM_I2C_SHORT_TIMEOUT);
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index eed3bf5..7d7a776 100644
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -95,6 +95,7 @@ struct tpm_info {
>
> struct priv_data {
> bool irq_tested;
> + wait_queue_head_t int_queue;
> };
>
> #if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
> @@ -157,6 +158,7 @@ static void release_locality(struct tpm_chip *chip, int l, int force)
>
> static int request_locality(struct tpm_chip *chip, int l)
> {
> + struct priv_data *priv = chip->vendor.priv;
> unsigned long stop, timeout;
> long rc;
>
> @@ -173,7 +175,7 @@ again:
> timeout = stop - jiffies;
> if ((long)timeout <= 0)
> return -1;
> - rc = wait_event_interruptible_timeout(chip->vendor.int_queue,
> + rc = wait_event_interruptible_timeout(priv->int_queue,
> (check_locality
> (chip, l) >= 0),
> timeout);
> @@ -249,6 +251,7 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
>
> static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
> {
> + struct priv_data *priv = chip->vendor.priv;
> int size = 0;
> int expected, status;
>
> @@ -279,7 +282,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
> }
>
> wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
> - &chip->vendor.int_queue, false);
> + &priv->int_queue, false);
> status = tpm_tis_status(chip);
> if (status & TPM_STS_DATA_AVAIL) { /* retry? */
> dev_err(&chip->dev, "Error left over data\n");
> @@ -304,6 +307,7 @@ MODULE_PARM_DESC(itpm, "Force iTPM workarounds (found on some Lenovo laptops)");
> */
> static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
> {
> + struct priv_data *priv = chip->vendor.priv;
> int rc, status, burstcnt;
> size_t count = 0;
>
> @@ -315,7 +319,7 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
> tpm_tis_ready(chip);
> if (wait_for_tpm_stat
> (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
> - &chip->vendor.int_queue, false) < 0) {
> + &priv->int_queue, false) < 0) {
> rc = -ETIME;
> goto out_err;
> }
> @@ -330,7 +334,7 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
> }
>
> wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
> - &chip->vendor.int_queue, false);
> + &priv->int_queue, false);
> status = tpm_tis_status(chip);
> if (!itpm && (status & TPM_STS_DATA_EXPECT) == 0) {
> rc = -EIO;
> @@ -342,7 +346,7 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
> iowrite8(buf[count],
> chip->vendor.iobase + TPM_DATA_FIFO(chip->vendor.locality));
> wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
> - &chip->vendor.int_queue, false);
> + &priv->int_queue, false);
> status = tpm_tis_status(chip);
> if ((status & TPM_STS_DATA_EXPECT) != 0) {
> rc = -EIO;
> @@ -537,6 +541,7 @@ static const struct tpm_class_ops tpm_tis = {
> static irqreturn_t tis_int_handler(int dummy, void *dev_id)
> {
> struct tpm_chip *chip = dev_id;
> + struct priv_data *priv = chip->vendor.priv;
> u32 interrupt;
> int i;
>
> @@ -556,7 +561,7 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id)
> if (interrupt &
> (TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_STS_VALID_INT |
> TPM_INTF_CMD_READY_INT))
> - wake_up_interruptible(&chip->vendor.int_queue);
> + wake_up_interruptible(&priv->int_queue);
>
> /* Clear interrupts handled with TPM_EOI */
> iowrite32(interrupt,
> @@ -773,7 +778,7 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
>
> /* INTERRUPT Setup */
> init_waitqueue_head(&chip->vendor.read_queue);
> - init_waitqueue_head(&chip->vendor.int_queue);
> + init_waitqueue_head(&priv->int_queue);
> if (interrupts && tpm_info->irq != -1) {
> if (tpm_info->irq) {
> tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
--
Jason Gunthorpe <jgunthorpe@...idianresearch.com> (780)4406067x832
Chief Technology Officer, Obsidian Research Corp Edmonton, Canada
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