diff options
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/trivial-devices.txt | 2 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm.c | 31 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm.h | 3 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_infineon.c | 180 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_stm_st33.c | 64 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_ppi.c | 14 |
6 files changed, 207 insertions, 87 deletions
diff --git a/Documentation/devicetree/bindings/i2c/trivial-devices.txt b/Documentation/devicetree/bindings/i2c/trivial-devices.txt index 446859fcdca4..ad6a73852f08 100644 --- a/Documentation/devicetree/bindings/i2c/trivial-devices.txt +++ b/Documentation/devicetree/bindings/i2c/trivial-devices.txt @@ -35,6 +35,8 @@ fsl,mc13892 MC13892: Power Management Integrated Circuit (PMIC) for i.MX35/51 fsl,mma8450 MMA8450Q: Xtrinsic Low-power, 3-axis Xtrinsic Accelerometer fsl,mpr121 MPR121: Proximity Capacitive Touch Sensor Controller fsl,sgtl5000 SGTL5000: Ultra Low-Power Audio Codec +infineon,slb9635tt Infineon SLB9635 (Soft-) I2C TPM (old protocol, max 100khz) +infineon,slb9645tt Infineon SLB9645 I2C TPM (new protocol, max 400khz) maxim,ds1050 5 Bit Programmable, Pulse-Width Modulator maxim,max1237 Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs maxim,max6625 9-Bit/12-Bit Temperature Sensors with I²C-Compatible Serial Interface diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 0d2e82f95577..7c3b3dcbfbc8 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -1337,7 +1337,7 @@ int tpm_pm_suspend(struct device *dev) { struct tpm_chip *chip = dev_get_drvdata(dev); struct tpm_cmd_t cmd; - int rc; + int rc, try; u8 dummy_hash[TPM_DIGEST_SIZE] = { 0 }; @@ -1355,9 +1355,32 @@ int tpm_pm_suspend(struct device *dev) } /* now do the actual savestate */ - cmd.header.in = savestate_header; - rc = transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, - "sending savestate before suspend"); + for (try = 0; try < TPM_RETRY; try++) { + cmd.header.in = savestate_header; + rc = transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL); + + /* + * If the TPM indicates that it is too busy to respond to + * this command then retry before giving up. It can take + * several seconds for this TPM to be ready. + * + * This can happen if the TPM has already been sent the + * SaveState command before the driver has loaded. TCG 1.2 + * specification states that any communication after SaveState + * may cause the TPM to invalidate previously saved state. + */ + if (rc != TPM_WARN_RETRY) + break; + msleep(TPM_TIMEOUT_RETRY); + } + + if (rc) + dev_err(chip->dev, + "Error (%d) sending savestate before suspend\n", rc); + else if (try > 0) + dev_warn(chip->dev, "TPM savestate took %dms\n", + try * TPM_TIMEOUT_RETRY); + return rc; } EXPORT_SYMBOL_GPL(tpm_pm_suspend); diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 81b52015f669..0770d1d79366 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -32,10 +32,12 @@ enum tpm_const { TPM_MINOR = 224, /* officially assigned */ TPM_BUFSIZE = 4096, TPM_NUM_DEVICES = 256, + TPM_RETRY = 50, /* 5 seconds */ }; enum tpm_timeout { TPM_TIMEOUT = 5, /* msecs */ + TPM_TIMEOUT_RETRY = 100 /* msecs */ }; /* TPM addresses */ @@ -44,6 +46,7 @@ enum tpm_addr { TPM_ADDR = 0x4E, }; +#define TPM_WARN_RETRY 0x800 #define TPM_WARN_DOING_SELFTEST 0x802 #define TPM_ERR_DEACTIVATED 0x6 #define TPM_ERR_DISABLED 0x7 diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c index 8fe7ac3d095b..37d5dcc10ea7 100644 --- a/drivers/char/tpm/tpm_i2c_infineon.c +++ b/drivers/char/tpm/tpm_i2c_infineon.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2012 Infineon Technologies + * Copyright (C) 2012,2013 Infineon Technologies * * Authors: * Peter Huewe <peter.huewe@infineon.com> @@ -56,13 +56,21 @@ #define TPM_TIMEOUT_US_HI (TPM_TIMEOUT_US_LOW + 2000) /* expected value for DIDVID register */ -#define TPM_TIS_I2C_DID_VID 0x000b15d1L +#define TPM_TIS_I2C_DID_VID_9635 0xd1150b00L +#define TPM_TIS_I2C_DID_VID_9645 0x001a15d1L + +enum i2c_chip_type { + SLB9635, + SLB9645, + UNKNOWN, +}; /* Structure to store I2C TPM specific stuff */ struct tpm_inf_dev { struct i2c_client *client; u8 buf[TPM_BUFSIZE + sizeof(u8)]; /* max. buffer size + addr */ struct tpm_chip *chip; + enum i2c_chip_type chip_type; }; static struct tpm_inf_dev tpm_dev; @@ -90,10 +98,20 @@ static struct i2c_driver tpm_tis_i2c_driver; static int iic_tpm_read(u8 addr, u8 *buffer, size_t len) { - struct i2c_msg msg1 = { tpm_dev.client->addr, 0, 1, &addr }; - struct i2c_msg msg2 = { tpm_dev.client->addr, I2C_M_RD, len, buffer }; + struct i2c_msg msg1 = { + .addr = tpm_dev.client->addr, + .len = 1, + .buf = &addr + }; + struct i2c_msg msg2 = { + .addr = tpm_dev.client->addr, + .flags = I2C_M_RD, + .len = len, + .buf = buffer + }; + struct i2c_msg msgs[] = {msg1, msg2}; - int rc; + int rc = 0; int count; /* Lock the adapter for the duration of the whole sequence. */ @@ -101,30 +119,53 @@ static int iic_tpm_read(u8 addr, u8 *buffer, size_t len) return -EOPNOTSUPP; i2c_lock_adapter(tpm_dev.client->adapter); - for (count = 0; count < MAX_COUNT; count++) { - rc = __i2c_transfer(tpm_dev.client->adapter, &msg1, 1); - if (rc > 0) - break; /* break here to skip sleep */ - - usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); - } - - if (rc <= 0) - goto out; - - /* After the TPM has successfully received the register address it needs - * some time, thus we're sleeping here again, before retrieving the data - */ - for (count = 0; count < MAX_COUNT; count++) { - usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); - rc = __i2c_transfer(tpm_dev.client->adapter, &msg2, 1); - if (rc > 0) - break; + if (tpm_dev.chip_type == SLB9645) { + /* use a combined read for newer chips + * unfortunately the smbus functions are not suitable due to + * the 32 byte limit of the smbus. + * retries should usually not be needed, but are kept just to + * be on the safe side. + */ + for (count = 0; count < MAX_COUNT; count++) { + rc = __i2c_transfer(tpm_dev.client->adapter, msgs, 2); + if (rc > 0) + break; /* break here to skip sleep */ + usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); + } + } else { + /* slb9635 protocol should work in all cases */ + for (count = 0; count < MAX_COUNT; count++) { + rc = __i2c_transfer(tpm_dev.client->adapter, &msg1, 1); + if (rc > 0) + break; /* break here to skip sleep */ + + usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); + } + if (rc <= 0) + goto out; + + /* After the TPM has successfully received the register address + * it needs some time, thus we're sleeping here again, before + * retrieving the data + */ + for (count = 0; count < MAX_COUNT; count++) { + usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); + rc = __i2c_transfer(tpm_dev.client->adapter, &msg2, 1); + if (rc > 0) + break; + } } out: i2c_unlock_adapter(tpm_dev.client->adapter); + /* take care of 'guard time' */ + usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); + + /* __i2c_transfer returns the number of successfully transferred + * messages. + * So rc should be greater than 0 here otherwise we have an error. + */ if (rc <= 0) return -EIO; @@ -138,7 +179,11 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len, int rc = -EIO; int count; - struct i2c_msg msg1 = { tpm_dev.client->addr, 0, len + 1, tpm_dev.buf }; + struct i2c_msg msg1 = { + .addr = tpm_dev.client->addr, + .len = len + 1, + .buf = tpm_dev.buf + }; if (len > TPM_BUFSIZE) return -EINVAL; @@ -154,16 +199,24 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len, /* * NOTE: We have to use these special mechanisms here and unfortunately * cannot rely on the standard behavior of i2c_transfer. + * Even for newer chips the smbus functions are not + * suitable due to the 32 byte limit of the smbus. */ for (count = 0; count < max_count; count++) { rc = __i2c_transfer(tpm_dev.client->adapter, &msg1, 1); if (rc > 0) break; - usleep_range(sleep_low, sleep_hi); } i2c_unlock_adapter(tpm_dev.client->adapter); + /* take care of 'guard time' */ + usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); + + /* __i2c_transfer returns the number of successfully transferred + * messages. + * So rc should be greater than 0 here otherwise we have an error. + */ if (rc <= 0) return -EIO; @@ -283,11 +336,18 @@ static int request_locality(struct tpm_chip *chip, int loc) static u8 tpm_tis_i2c_status(struct tpm_chip *chip) { /* NOTE: since I2C read may fail, return 0 in this case --> time-out */ - u8 buf; - if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0) - return 0; - else - return buf; + u8 buf = 0xFF; + u8 i = 0; + + do { + if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0) + return 0; + + i++; + /* if locallity is set STS should not be 0xFF */ + } while ((buf == 0xFF) && i < 10); + + return buf; } static void tpm_tis_i2c_ready(struct tpm_chip *chip) @@ -328,7 +388,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout, /* check current status */ *status = tpm_tis_i2c_status(chip); - if ((*status & mask) == mask) + if ((*status != 0xFF) && (*status & mask) == mask) return 0; stop = jiffies + timeout; @@ -372,7 +432,6 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) /* avoid endless loop in case of broken HW */ if (retries > MAX_COUNT_LONG) return -EIO; - } return size; } @@ -480,7 +539,6 @@ static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len) rc = -EIO; goto out_err; } - } /* write last byte */ @@ -568,6 +626,7 @@ static int tpm_tis_i2c_init(struct device *dev) chip = tpm_register_hardware(dev, &tpm_tis_i2c); if (!chip) { + dev_err(dev, "could not register hardware\n"); rc = -ENODEV; goto out_err; } @@ -582,20 +641,24 @@ static int tpm_tis_i2c_init(struct device *dev) chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT); if (request_locality(chip, 0) != 0) { + dev_err(dev, "could not request locality\n"); rc = -ENODEV; goto out_vendor; } /* read four bytes from DID_VID register */ if (iic_tpm_read(TPM_DID_VID(0), (u8 *)&vendor, 4) < 0) { + dev_err(dev, "could not read vendor id\n"); rc = -EIO; goto out_release; } - /* create DID_VID register value, after swapping to little-endian */ - vendor = be32_to_cpu((__be32) vendor); - - if (vendor != TPM_TIS_I2C_DID_VID) { + if (vendor == TPM_TIS_I2C_DID_VID_9645) { + tpm_dev.chip_type = SLB9645; + } else if (vendor == TPM_TIS_I2C_DID_VID_9635) { + tpm_dev.chip_type = SLB9635; + } else { + dev_err(dev, "vendor id did not match! ID was %08x\n", vendor); rc = -ENODEV; goto out_release; } @@ -631,22 +694,53 @@ out_err: static const struct i2c_device_id tpm_tis_i2c_table[] = { {"tpm_i2c_infineon", 0}, + {"slb9635tt", 0}, + {"slb9645tt", 1}, {}, }; MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_table); + +#ifdef CONFIG_OF +static const struct of_device_id tpm_tis_i2c_of_match[] = { + { + .name = "tpm_i2c_infineon", + .type = "tpm", + .compatible = "infineon,tpm_i2c_infineon", + .data = (void *)0 + }, + { + .name = "slb9635tt", + .type = "tpm", + .compatible = "infineon,slb9635tt", + .data = (void *)0 + }, + { + .name = "slb9645tt", + .type = "tpm", + .compatible = "infineon,slb9645tt", + .data = (void *)1 + }, + {}, +}; +MODULE_DEVICE_TABLE(of, tpm_tis_i2c_of_match); +#endif + static SIMPLE_DEV_PM_OPS(tpm_tis_i2c_ops, tpm_pm_suspend, tpm_pm_resume); static int tpm_tis_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { int rc; - if (tpm_dev.client != NULL) + struct device *dev = &(client->dev); + + if (tpm_dev.client != NULL) { + dev_err(dev, "This driver only supports one client at a time\n"); return -EBUSY; /* We only support one client */ + } if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { - dev_err(&client->dev, - "no algorithms associated to the i2c bus\n"); + dev_err(dev, "no algorithms associated to the i2c bus\n"); return -ENODEV; } @@ -682,7 +776,6 @@ static int tpm_tis_i2c_remove(struct i2c_client *client) } static struct i2c_driver tpm_tis_i2c_driver = { - .id_table = tpm_tis_i2c_table, .probe = tpm_tis_i2c_probe, .remove = tpm_tis_i2c_remove, @@ -690,11 +783,12 @@ static struct i2c_driver tpm_tis_i2c_driver = { .name = "tpm_i2c_infineon", .owner = THIS_MODULE, .pm = &tpm_tis_i2c_ops, + .of_match_table = of_match_ptr(tpm_tis_i2c_of_match), }, }; module_i2c_driver(tpm_tis_i2c_driver); MODULE_AUTHOR("Peter Huewe <peter.huewe@infineon.com>"); MODULE_DESCRIPTION("TPM TIS I2C Infineon Driver"); -MODULE_VERSION("2.1.5"); +MODULE_VERSION("2.2.0"); MODULE_LICENSE("GPL"); diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c index 1f5f71e14abe..5bb8e2ddd3b3 100644 --- a/drivers/char/tpm/tpm_i2c_stm_st33.c +++ b/drivers/char/tpm/tpm_i2c_stm_st33.c @@ -36,7 +36,6 @@ #include <linux/i2c.h> #include <linux/fs.h> #include <linux/miscdevice.h> -#include <linux/module.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/init.h> @@ -50,7 +49,6 @@ #include <linux/uaccess.h> #include <linux/io.h> #include <linux/slab.h> -#include <linux/sched.h> #include "tpm.h" #include "tpm_i2c_stm_st33.h" @@ -178,7 +176,7 @@ static long _wait_for_interrupt_serirq_timeout(struct tpm_chip *chip, struct i2c_client *client; struct st33zp24_platform_data *pin_infos; - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); pin_infos = client->dev.platform_data; status = wait_for_completion_interruptible_timeout( @@ -197,12 +195,12 @@ static int wait_for_serirq_timeout(struct tpm_chip *chip, bool condition, int status = 2; struct i2c_client *client; - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); status = _wait_for_interrupt_serirq_timeout(chip, timeout); if (!status) { status = -EBUSY; - } else{ + } else { clear_interruption(client); if (condition) status = 1; @@ -219,7 +217,7 @@ static void tpm_stm_i2c_cancel(struct tpm_chip *chip) struct i2c_client *client; u8 data; - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); data = TPM_STS_COMMAND_READY; I2C_WRITE_DATA(client, TPM_STS, &data, 1); @@ -236,7 +234,7 @@ static u8 tpm_stm_i2c_status(struct tpm_chip *chip) { struct i2c_client *client; u8 data; - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); I2C_READ_DATA(client, TPM_STS, &data, 1); return data; @@ -254,7 +252,7 @@ static int check_locality(struct tpm_chip *chip) u8 data; u8 status; - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); status = I2C_READ_DATA(client, TPM_ACCESS, &data, 1); if (status && (data & @@ -278,7 +276,7 @@ static int request_locality(struct tpm_chip *chip) struct i2c_client *client; u8 data; - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); if (check_locality(chip) == chip->vendor.locality) return chip->vendor.locality; @@ -294,7 +292,7 @@ static int request_locality(struct tpm_chip *chip) chip->vendor.timeout_a); if (rc > 0) return chip->vendor.locality; - } else{ + } else { stop = jiffies + chip->vendor.timeout_a; do { if (check_locality(chip) >= 0) @@ -316,7 +314,7 @@ static void release_locality(struct tpm_chip *chip) struct i2c_client *client; u8 data; - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); data = TPM_ACCESS_ACTIVE_LOCALITY; I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1); @@ -333,7 +331,7 @@ static int get_burstcount(struct tpm_chip *chip) int burstcnt, status; u8 tpm_reg, temp; - struct i2c_client *client = (struct i2c_client *) TPM_VPRIV(chip); + struct i2c_client *client = (struct i2c_client *)TPM_VPRIV(chip); stop = jiffies + chip->vendor.timeout_d; do { @@ -379,7 +377,7 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout, mask), timeout); if (rc > 0) return 0; - } else{ + } else { stop = jiffies + timeout; do { msleep(TPM_TIMEOUT); @@ -403,7 +401,7 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) int size = 0, burstcnt, len; struct i2c_client *client; - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); while (size < count && wait_for_stat(chip, @@ -433,7 +431,7 @@ static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id) disable_irq_nosync(irq); - client = (struct i2c_client *) TPM_VPRIV(chip); + client = (struct i2c_client *)TPM_VPRIV(chip); pin_infos = client->dev.platform_data; complete(&pin_infos->irq_detection); @@ -453,8 +451,7 @@ static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id) static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, size_t len) { - u32 status, - burstcnt = 0, i, size; + u32 status, burstcnt = 0, i, size; int ret; u8 data; struct i2c_client *client; @@ -483,7 +480,7 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, } } - for (i = 0 ; i < len - 1 ;) { + for (i = 0; i < len - 1;) { burstcnt = get_burstcount(chip); size = min_t(int, len - i - 1, burstcnt); ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf, size); @@ -547,7 +544,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf, goto out; } - expected = be32_to_cpu(*(__be32 *) (buf + 2)); + expected = be32_to_cpu(*(__be32 *)(buf + 2)); if (expected > count) { size = -EIO; goto out; @@ -569,7 +566,7 @@ out: static bool tpm_st33_i2c_req_canceled(struct tpm_chip *chip, u8 status) { - return (status == TPM_STS_COMMAND_READY); + return (status == TPM_STS_COMMAND_READY); } static const struct file_operations tpm_st33_i2c_fops = { @@ -617,7 +614,7 @@ static struct tpm_vendor_specific st_i2c_tpm = { .miscdev = {.fops = &tpm_st33_i2c_fops,}, }; -static int interrupts ; +static int interrupts; module_param(interrupts, int, 0444); MODULE_PARM_DESC(interrupts, "Enable interrupts"); @@ -714,7 +711,7 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) "TPM SERIRQ management", chip); if (err < 0) { dev_err(chip->dev , "TPM SERIRQ signals %d not available\n", - gpio_to_irq(platform_data->io_serirq)); + gpio_to_irq(platform_data->io_serirq)); goto _irq_set; } @@ -754,7 +751,7 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) dev_info(chip->dev, "TPM I2C Initialized\n"); return 0; _irq_set: - free_irq(gpio_to_irq(platform_data->io_serirq), (void *) chip); + free_irq(gpio_to_irq(platform_data->io_serirq), (void *)chip); _gpio_init2: if (interrupts) gpio_free(platform_data->io_serirq); @@ -784,7 +781,7 @@ static int tpm_st33_i2c_remove(struct i2c_client *client) { struct tpm_chip *chip = (struct tpm_chip *)i2c_get_clientdata(client); struct st33zp24_platform_data *pin_infos = - ((struct i2c_client *) TPM_VPRIV(chip))->dev.platform_data; + ((struct i2c_client *)TPM_VPRIV(chip))->dev.platform_data; if (pin_infos != NULL) { free_irq(pin_infos->io_serirq, chip); @@ -823,9 +820,9 @@ static int tpm_st33_i2c_pm_suspend(struct device *dev) struct st33zp24_platform_data *pin_infos = dev->platform_data; int ret = 0; - if (power_mgt) + if (power_mgt) { gpio_set_value(pin_infos->io_lpcpd, 0); - else{ + } else { if (chip->data_buffer == NULL) chip->data_buffer = pin_infos->tpm_i2c_buffer[0]; ret = tpm_pm_suspend(dev); @@ -851,12 +848,12 @@ static int tpm_st33_i2c_pm_resume(struct device *dev) (chip->vendor.status(chip) & TPM_STS_VALID) == TPM_STS_VALID, chip->vendor.timeout_b); - } else{ - if (chip->data_buffer == NULL) - chip->data_buffer = pin_infos->tpm_i2c_buffer[0]; - ret = tpm_pm_resume(dev); - if (!ret) - tpm_do_selftest(chip); + } else { + if (chip->data_buffer == NULL) + chip->data_buffer = pin_infos->tpm_i2c_buffer[0]; + ret = tpm_pm_resume(dev); + if (!ret) + tpm_do_selftest(chip); } return ret; } /* tpm_st33_i2c_pm_resume() */ @@ -867,7 +864,8 @@ static const struct i2c_device_id tpm_st33_i2c_id[] = { {} }; MODULE_DEVICE_TABLE(i2c, tpm_st33_i2c_id); -static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops, tpm_st33_i2c_pm_suspend, tpm_st33_i2c_pm_resume); +static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops, tpm_st33_i2c_pm_suspend, + tpm_st33_i2c_pm_resume); static struct i2c_driver tpm_st33_i2c_driver = { .driver = { .owner = THIS_MODULE, diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c index 720ebcf29fdf..2168d15bc728 100644 --- a/drivers/char/tpm/tpm_ppi.c +++ b/drivers/char/tpm/tpm_ppi.c @@ -158,9 +158,9 @@ static ssize_t tpm_store_ppi_request(struct device *dev, ACPI_TYPE_STRING); if (ACPI_FAILURE(status)) return -ENOMEM; - strncpy(version, + strlcpy(version, ((union acpi_object *)output.pointer)->string.pointer, - PPI_VERSION_LEN); + PPI_VERSION_LEN + 1); kfree(output.pointer); output.length = ACPI_ALLOCATE_BUFFER; output.pointer = NULL; @@ -237,9 +237,9 @@ static ssize_t tpm_show_ppi_transition_action(struct device *dev, ACPI_TYPE_STRING); if (ACPI_FAILURE(status)) return -ENOMEM; - strncpy(version, + strlcpy(version, ((union acpi_object *)output.pointer)->string.pointer, - PPI_VERSION_LEN); + PPI_VERSION_LEN + 1); /* * PPI spec defines params[3].type as empty package, but some platforms * (e.g. Capella with PPI 1.0) need integer/string/buffer type, so for @@ -351,7 +351,7 @@ cleanup: static ssize_t show_ppi_operations(char *buf, u32 start, u32 end) { char *str = buf; - char version[PPI_VERSION_LEN]; + char version[PPI_VERSION_LEN + 1]; acpi_handle handle; acpi_status status; struct acpi_object_list input; @@ -381,9 +381,9 @@ static ssize_t show_ppi_operations(char *buf, u32 start, u32 end) if (ACPI_FAILURE(status)) return -ENOMEM; - strncpy(version, + strlcpy(version, ((union acpi_object *)output.pointer)->string.pointer, - PPI_VERSION_LEN); + PPI_VERSION_LEN + 1); kfree(output.pointer); output.length = ACPI_ALLOCATE_BUFFER; output.pointer = NULL; |