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Date: Thu, 17 Nov 2016 16:10:29 +0530
From: Nayna <nayna@...ux.vnet.ibm.com>
To: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
tpmdd-devel@...ts.sourceforge.net
Cc: Christophe Ricard <christophe.ricard@...il.com>,
open list <linux-kernel@...r.kernel.org>,
linux-security-module@...r.kernel.org
Subject: Re: [tpmdd-devel] [PATCH] tpm: drop chip->is_open and
chip->duration_adjusted
On 11/15/2016 05:14 AM, Jarkko Sakkinen wrote:
> Use atomic bitops for chip->flags so that we do not need chip->is_open
> and chip->duration_adjusted anymore.
>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> ---
> drivers/char/tpm/st33zp24/st33zp24.c | 6 +++---
> drivers/char/tpm/tpm-chip.c | 14 ++++++++------
> drivers/char/tpm/tpm-dev.c | 9 +++------
> drivers/char/tpm/tpm-interface.c | 30 +++++++++++++++---------------
> drivers/char/tpm/tpm-sysfs.c | 2 +-
> drivers/char/tpm/tpm.h | 14 +++++++-------
> drivers/char/tpm/tpm2-cmd.c | 2 +-
> drivers/char/tpm/tpm_crb.c | 2 +-
> drivers/char/tpm/tpm_i2c_nuvoton.c | 8 ++++----
> drivers/char/tpm/tpm_tis_core.c | 26 +++++++++++++-------------
> drivers/char/tpm/tpm_vtpm_proxy.c | 2 +-
> 11 files changed, 57 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/char/tpm/st33zp24/st33zp24.c b/drivers/char/tpm/st33zp24/st33zp24.c
> index 6f060c7..14734a0 100644
> --- a/drivers/char/tpm/st33zp24/st33zp24.c
> +++ b/drivers/char/tpm/st33zp24/st33zp24.c
> @@ -267,7 +267,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
>
> stop = jiffies + timeout;
>
> - if (chip->flags & TPM_CHIP_FLAG_IRQ) {
> + if (test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags)) {
> cur_intrs = tpm_dev->intrs;
> clear_interruption(tpm_dev);
> enable_irq(tpm_dev->irq);
> @@ -429,7 +429,7 @@ static int st33zp24_send(struct tpm_chip *chip, unsigned char *buf,
> if (ret < 0)
> goto out_err;
>
> - if (chip->flags & TPM_CHIP_FLAG_IRQ) {
> + if (test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags)) {
> ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
>
> ret = wait_for_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
> @@ -586,7 +586,7 @@ int st33zp24_probe(void *phy_id, const struct st33zp24_phy_ops *ops,
> goto _tpm_clean_answer;
>
> tpm_dev->irq = irq;
> - chip->flags |= TPM_CHIP_FLAG_IRQ;
> + set_bit(TPM_CHIP_FLAG_IRQ, &chip->flags);
>
> disable_irq_nosync(tpm_dev->irq);
> }
> diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
> index 3f27753..04819e1 100644
> --- a/drivers/char/tpm/tpm-chip.c
> +++ b/drivers/char/tpm/tpm-chip.c
> @@ -183,7 +183,7 @@ struct tpm_chip *tpm_chip_alloc(struct device *dev,
> goto out;
>
> if (!dev)
> - chip->flags |= TPM_CHIP_FLAG_VIRTUAL;
> + set_bit(TPM_CHIP_FLAG_VIRTUAL, &chip->flags);
>
> cdev_init(&chip->cdev, &tpm_fops);
> chip->cdev.owner = THIS_MODULE;
> @@ -271,7 +271,7 @@ static void tpm_del_char_device(struct tpm_chip *chip)
>
> /* Make the driver uncallable. */
> down_write(&chip->ops_sem);
> - if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags))
> tpm2_shutdown(chip, TPM2_SU_CLEAR);
> chip->ops = NULL;
> up_write(&chip->ops_sem);
> @@ -281,7 +281,8 @@ static void tpm_del_legacy_sysfs(struct tpm_chip *chip)
> {
> struct attribute **i;
>
> - if (chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL))
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags) ||
> + test_bit(TPM_CHIP_FLAG_VIRTUAL, &chip->flags))
> return;
>
> sysfs_remove_link(&chip->dev.parent->kobj, "ppi");
> @@ -299,8 +300,9 @@ static int tpm_add_legacy_sysfs(struct tpm_chip *chip)
> struct attribute **i;
> int rc;
>
> - if (chip->flags & (TPM_CHIP_FLAG_TPM2 | TPM_CHIP_FLAG_VIRTUAL))
> - return 0;
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags) ||
> + test_bit(TPM_CHIP_FLAG_VIRTUAL, &chip->flags))
> + return;
guess should be "return 0;"
Thanks & Regards,
- Nayna
>
> rc = __compat_only_sysfs_link_entry_to_kobj(
> &chip->dev.parent->kobj, &chip->dev.kobj, "ppi");
> @@ -335,7 +337,7 @@ int tpm_chip_register(struct tpm_chip *chip)
> int rc;
>
> if (chip->ops->flags & TPM_OPS_AUTO_STARTUP) {
> - if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags))
> rc = tpm2_auto_startup(chip);
> else
> rc = tpm1_auto_startup(chip);
> diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c
> index 912ad30..3738c38 100644
> --- a/drivers/char/tpm/tpm-dev.c
> +++ b/drivers/char/tpm/tpm-dev.c
> @@ -57,17 +57,14 @@ static int tpm_open(struct inode *inode, struct file *file)
> container_of(inode->i_cdev, struct tpm_chip, cdev);
> struct file_priv *priv;
>
> - /* It's assured that the chip will be opened just once,
> - * by the check of is_open variable, which is protected
> - * by driver_lock. */
> - if (test_and_set_bit(0, &chip->is_open)) {
> + if (test_and_set_bit(TPM_CHIP_FLAG_IS_OPEN, &chip->flags)) {
> dev_dbg(&chip->dev, "Another process owns this TPM\n");
> return -EBUSY;
> }
>
> priv = kzalloc(sizeof(*priv), GFP_KERNEL);
> if (priv == NULL) {
> - clear_bit(0, &chip->is_open);
> + clear_bit(TPM_CHIP_FLAG_IS_OPEN, &chip->flags);
> return -ENOMEM;
> }
>
> @@ -173,7 +170,7 @@ static int tpm_release(struct inode *inode, struct file *file)
> flush_work(&priv->work);
> file->private_data = NULL;
> atomic_set(&priv->data_pending, 0);
> - clear_bit(0, &priv->chip->is_open);
> + clear_bit(TPM_CHIP_FLAG_IS_OPEN, &priv->chip->flags);
> kfree(priv);
> return 0;
> }
> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> index a2688ac..6426be7 100644
> --- a/drivers/char/tpm/tpm-interface.c
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -367,10 +367,10 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const u8 *buf, size_t bufsiz,
> goto out;
> }
>
> - if (chip->flags & TPM_CHIP_FLAG_IRQ)
> + if (test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags))
> goto out_recv;
>
> - if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags))
> stop = jiffies + tpm2_calc_ordinal_duration(chip, ordinal);
> else
> stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
> @@ -503,10 +503,10 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> unsigned long old_timeout[4];
> ssize_t rc;
>
> - if (chip->flags & TPM_CHIP_FLAG_HAVE_TIMEOUTS)
> + if (test_bit(TPM_CHIP_FLAG_HAVE_TIMEOUTS, &chip->flags))
> return 0;
>
> - if (chip->flags & TPM_CHIP_FLAG_TPM2) {
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)) {
> /* Fixed timeouts for TPM2 */
> chip->timeout_a = msecs_to_jiffies(TPM2_TIMEOUT_A);
> chip->timeout_b = msecs_to_jiffies(TPM2_TIMEOUT_B);
> @@ -519,7 +519,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> chip->duration[TPM_LONG] =
> msecs_to_jiffies(TPM2_DURATION_LONG);
>
> - chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;
> + set_bit(TPM_CHIP_FLAG_HAVE_TIMEOUTS, &chip->flags);
> return 0;
> }
>
> @@ -600,11 +600,11 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> chip->duration[TPM_SHORT] = HZ;
> chip->duration[TPM_MEDIUM] *= 1000;
> chip->duration[TPM_LONG] *= 1000;
> - chip->duration_adjusted = true;
> + set_bit(TPM_CHIP_FLAG_DURATION_ADJUSTED, &chip->flags);
> dev_info(&chip->dev, "Adjusting TPM timeout parameters.");
> }
>
> - chip->flags |= TPM_CHIP_FLAG_HAVE_TIMEOUTS;
> + set_bit(TPM_CHIP_FLAG_HAVE_TIMEOUTS, &chip->flags);
> return 0;
> }
> EXPORT_SYMBOL_GPL(tpm_get_timeouts);
> @@ -676,7 +676,7 @@ int tpm_is_tpm2(u32 chip_num)
> if (chip == NULL)
> return -ENODEV;
>
> - rc = (chip->flags & TPM_CHIP_FLAG_TPM2) != 0;
> + rc = (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)) != 0;
>
> tpm_put_ops(chip);
>
> @@ -703,7 +703,7 @@ int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf)
> chip = tpm_chip_find_get(chip_num);
> if (chip == NULL)
> return -ENODEV;
> - if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags))
> rc = tpm2_pcr_read(chip, pcr_idx, res_buf);
> else
> rc = tpm_pcr_read_dev(chip, pcr_idx, res_buf);
> @@ -740,7 +740,7 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
> if (chip == NULL)
> return -ENODEV;
>
> - if (chip->flags & TPM_CHIP_FLAG_TPM2) {
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)) {
> rc = tpm2_pcr_extend(chip, pcr_idx, hash);
> tpm_put_ops(chip);
> return rc;
> @@ -890,7 +890,7 @@ int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
>
> stop = jiffies + timeout;
>
> - if (chip->flags & TPM_CHIP_FLAG_IRQ) {
> + if (test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags)) {
> again:
> timeout = stop - jiffies;
> if ((long)timeout <= 0)
> @@ -944,7 +944,7 @@ int tpm_pm_suspend(struct device *dev)
> if (chip == NULL)
> return -ENODEV;
>
> - if (chip->flags & TPM_CHIP_FLAG_TPM2) {
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)) {
> tpm2_shutdown(chip, TPM2_SU_STATE);
> return 0;
> }
> @@ -1036,7 +1036,7 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
> if (chip == NULL)
> return -ENODEV;
>
> - if (chip->flags & TPM_CHIP_FLAG_TPM2) {
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)) {
> err = tpm2_get_random(chip, out, max);
> tpm_put_ops(chip);
> return err;
> @@ -1081,7 +1081,7 @@ int tpm_seal_trusted(u32 chip_num, struct trusted_key_payload *payload,
> int rc;
>
> chip = tpm_chip_find_get(chip_num);
> - if (chip == NULL || !(chip->flags & TPM_CHIP_FLAG_TPM2))
> + if (chip == NULL || !(test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)))
> return -ENODEV;
>
> rc = tpm2_seal_trusted(chip, payload, options);
> @@ -1107,7 +1107,7 @@ int tpm_unseal_trusted(u32 chip_num, struct trusted_key_payload *payload,
> int rc;
>
> chip = tpm_chip_find_get(chip_num);
> - if (chip == NULL || !(chip->flags & TPM_CHIP_FLAG_TPM2))
> + if (chip == NULL || !(test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)))
> return -ENODEV;
>
> rc = tpm2_unseal_trusted(chip, payload, options);
> diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
> index 848ad65..21b3fde 100644
> --- a/drivers/char/tpm/tpm-sysfs.c
> +++ b/drivers/char/tpm/tpm-sysfs.c
> @@ -244,7 +244,7 @@ static ssize_t durations_show(struct device *dev, struct device_attribute *attr,
> jiffies_to_usecs(chip->duration[TPM_SHORT]),
> jiffies_to_usecs(chip->duration[TPM_MEDIUM]),
> jiffies_to_usecs(chip->duration[TPM_LONG]),
> - chip->duration_adjusted
> + test_bit(TPM_CHIP_FLAG_DURATION_ADJUSTED, &chip->flags)
> ? "adjusted" : "original");
> }
> static DEVICE_ATTR_RO(durations);
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 1ae9768..a1fadfa 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -142,10 +142,12 @@ enum tpm2_startup_types {
> #define TPM_PPI_VERSION_LEN 3
>
> enum tpm_chip_flags {
> - TPM_CHIP_FLAG_TPM2 = BIT(1),
> - TPM_CHIP_FLAG_IRQ = BIT(2),
> - TPM_CHIP_FLAG_VIRTUAL = BIT(3),
> - TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4),
> + TPM_CHIP_FLAG_IS_OPEN = 0,
> + TPM_CHIP_FLAG_TPM2 = 1,
> + TPM_CHIP_FLAG_IRQ = 2,
> + TPM_CHIP_FLAG_VIRTUAL = 3,
> + TPM_CHIP_FLAG_HAVE_TIMEOUTS = 4,
> + TPM_CHIP_FLAG_DURATION_ADJUSTED = 5,
> };
>
> struct tpm_chip_seqops {
> @@ -168,10 +170,9 @@ struct tpm_chip {
> struct tpm_chip_seqops bin_log_seqops;
> struct tpm_chip_seqops ascii_log_seqops;
>
> - unsigned int flags;
> + unsigned long flags;
>
> int dev_num; /* /dev/tpm# */
> - unsigned long is_open; /* only one allowed */
>
> struct mutex tpm_mutex; /* tpm is processing */
>
> @@ -181,7 +182,6 @@ struct tpm_chip {
> unsigned long timeout_d; /* jiffies */
> bool timeout_adjusted;
> unsigned long duration[3]; /* jiffies */
> - bool duration_adjusted;
>
> struct dentry *bios_dir[TPM_NUM_EVENT_LOG_FILES];
>
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index da5b782..7abe8a0 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -946,7 +946,7 @@ int tpm2_probe(struct tpm_chip *chip)
> return rc;
>
> if (be16_to_cpu(cmd.header.out.tag) == TPM2_ST_NO_SESSIONS)
> - chip->flags |= TPM_CHIP_FLAG_TPM2;
> + set_bit(TPM_CHIP_FLAG_TPM2, &chip->flags);
>
> return 0;
> }
> diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
> index 65040d7..e37ebaa 100644
> --- a/drivers/char/tpm/tpm_crb.c
> +++ b/drivers/char/tpm/tpm_crb.c
> @@ -429,7 +429,7 @@ static int crb_acpi_add(struct acpi_device *device)
>
> dev_set_drvdata(&chip->dev, priv);
> chip->acpi_dev_handle = device->handle;
> - chip->flags = TPM_CHIP_FLAG_TPM2;
> + set_bit(TPM_CHIP_FLAG_TPM2, &chip->flags);
>
> rc = crb_cmd_ready(dev, priv);
> if (rc)
> diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
> index e3a9155..f4e25b5 100644
> --- a/drivers/char/tpm/tpm_i2c_nuvoton.c
> +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
> @@ -180,7 +180,7 @@ static bool i2c_nuvoton_check_status(struct tpm_chip *chip, u8 mask, u8 value)
> static int i2c_nuvoton_wait_for_stat(struct tpm_chip *chip, u8 mask, u8 value,
> u32 timeout, wait_queue_head_t *queue)
> {
> - if ((chip->flags & TPM_CHIP_FLAG_IRQ) && queue) {
> + if ((test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags)) && queue) {
> s32 rc;
> struct priv_data *priv = dev_get_drvdata(&chip->dev);
> unsigned int cur_intrs = priv->intrs;
> @@ -552,10 +552,10 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
>
> of_id = of_match_device(dev->driver->of_match_table, dev);
> if (of_id && of_id->data == OF_IS_TPM2)
> - chip->flags |= TPM_CHIP_FLAG_TPM2;
> + set_bit(TPM_CHIP_FLAG_TPM2, &chip->flags);
> } else
> if (id->driver_data == I2C_IS_TPM2)
> - chip->flags |= TPM_CHIP_FLAG_TPM2;
> + set_bit(TPM_CHIP_FLAG_TPM2, &chip->flags);
>
> init_waitqueue_head(&priv->read_queue);
>
> @@ -585,7 +585,7 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
> __func__, priv->irq);
> priv->irq = 0;
> } else {
> - chip->flags |= TPM_CHIP_FLAG_IRQ;
> + set_bit(TPM_CHIP_FLAG_IRQ, &chip->flags);
> /* Clear any pending interrupt */
> i2c_nuvoton_ready(chip);
> /* - wait for TPM_STS==0xA0 (stsValid, commandReady) */
> diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
> index 7993678..e6af2a0 100644
> --- a/drivers/char/tpm/tpm_tis_core.c
> +++ b/drivers/char/tpm/tpm_tis_core.c
> @@ -105,7 +105,7 @@ static int request_locality(struct tpm_chip *chip, int l)
>
> stop = jiffies + chip->timeout_a;
>
> - if (chip->flags & TPM_CHIP_FLAG_IRQ) {
> + if (test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags)) {
> again:
> timeout = stop - jiffies;
> if ((long)timeout <= 0)
> @@ -346,7 +346,7 @@ static void disable_interrupts(struct tpm_chip *chip)
>
> devm_free_irq(chip->dev.parent, priv->irq, chip);
> priv->irq = 0;
> - chip->flags &= ~TPM_CHIP_FLAG_IRQ;
> + clear_bit(TPM_CHIP_FLAG_IRQ, &chip->flags);
> }
>
> /*
> @@ -370,10 +370,10 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
> if (rc < 0)
> goto out_err;
>
> - if (chip->flags & TPM_CHIP_FLAG_IRQ) {
> + if (test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags)) {
> ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
>
> - if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags))
> dur = tpm2_calc_ordinal_duration(chip, ordinal);
> else
> dur = tpm_calc_ordinal_duration(chip, ordinal);
> @@ -397,16 +397,16 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
> int rc, irq;
> struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
>
> - if (!(chip->flags & TPM_CHIP_FLAG_IRQ) || priv->irq_tested)
> + if (!(test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags)) || priv->irq_tested)
> return tpm_tis_send_main(chip, buf, len);
>
> /* Verify receipt of the expected IRQ */
> irq = priv->irq;
> priv->irq = 0;
> - chip->flags &= ~TPM_CHIP_FLAG_IRQ;
> + clear_bit(TPM_CHIP_FLAG_IRQ, &chip->flags);
> rc = tpm_tis_send_main(chip, buf, len);
> priv->irq = irq;
> - chip->flags |= TPM_CHIP_FLAG_IRQ;
> + set_bit(TPM_CHIP_FLAG_IRQ, &chip->flags);
> if (!priv->irq_tested)
> msleep(1);
> if (!priv->irq_tested)
> @@ -549,7 +549,7 @@ static int tpm_tis_gen_interrupt(struct tpm_chip *chip)
> u32 cap2;
> cap_t cap;
>
> - if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + if (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags))
> return tpm2_get_tpm_pt(chip, 0x100, &cap2, desc);
> else
> return tpm_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap, desc);
> @@ -611,7 +611,7 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
> /* tpm_tis_send will either confirm the interrupt is working or it
> * will call disable_irq which undoes all of the above.
> */
> - if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) {
> + if (!(test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags))) {
> rc = tpm_tis_write8(priv, original_int_vec,
> TPM_INT_VECTOR(priv->locality));
> if (rc < 0)
> @@ -737,7 +737,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
> goto out_err;
>
> dev_info(dev, "%s TPM (device-id 0x%X, rev-id %d)\n",
> - (chip->flags & TPM_CHIP_FLAG_TPM2) ? "2.0" : "1.2",
> + (test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)) ? "2.0" : "1.2",
> vendor >> 16, rid);
>
> if (!(priv->flags & TPM_TIS_ITPM_POSSIBLE)) {
> @@ -794,7 +794,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
> if (irq) {
> tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
> irq);
> - if (!(chip->flags & TPM_CHIP_FLAG_IRQ))
> + if (!(test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags)))
> dev_err(&chip->dev, FW_BUG
> "TPM interrupt not working, polling instead\n");
> } else {
> @@ -839,7 +839,7 @@ int tpm_tis_resume(struct device *dev)
> struct tpm_chip *chip = dev_get_drvdata(dev);
> int ret;
>
> - if (chip->flags & TPM_CHIP_FLAG_IRQ)
> + if (test_bit(TPM_CHIP_FLAG_IRQ, &chip->flags))
> tpm_tis_reenable_interrupts(chip);
>
> ret = tpm_pm_resume(dev);
> @@ -849,7 +849,7 @@ int tpm_tis_resume(struct device *dev)
> /* TPM 1.2 requires self-test on resume. This function actually returns
> * an error code but for unknown reason it isn't handled.
> */
> - if (!(chip->flags & TPM_CHIP_FLAG_TPM2))
> + if (!(test_bit(TPM_CHIP_FLAG_TPM2, &chip->flags)))
> tpm_do_selftest(chip);
>
> return 0;
> diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
> index 3d6f6ca..b0cb284 100644
> --- a/drivers/char/tpm/tpm_vtpm_proxy.c
> +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
> @@ -482,7 +482,7 @@ static struct file *vtpm_proxy_create_device(
> vtpm_proxy_fops_open(file);
>
> if (proxy_dev->flags & VTPM_PROXY_FLAG_TPM2)
> - proxy_dev->chip->flags |= TPM_CHIP_FLAG_TPM2;
> + set_bit(TPM_CHIP_FLAG_TPM2, &proxy_dev->chip->flags);
>
> vtpm_proxy_work_start(proxy_dev);
>
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