From: Jason Gunthorpe Date: Sun, 22 Sep 2013 22:03:28 +0000 (-0600) Subject: tpm: st33: Remove chip->data_buffer access from this driver X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cb996158dfe8a31377700f46b7f3d69ddc5ae1e4;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git tpm: st33: Remove chip->data_buffer access from this driver For some reason this driver thinks that chip->data_buffer needs to be set before it can call tpm_pm_*. This is not true. data_buffer is used only by /dev/tpmX, which is why it is managed exclusively by the fops functions. Cc: Mathias Leblanc Signed-off-by: Jason Gunthorpe Reviewed-by: Joel Schopp --- diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c index 1c68d9317aba..b2390b6173e7 100644 --- a/drivers/char/tpm/tpm_i2c_stm_st33.c +++ b/drivers/char/tpm/tpm_i2c_stm_st33.c @@ -805,24 +805,18 @@ static int tpm_st33_i2c_remove(struct i2c_client *client) #ifdef CONFIG_PM_SLEEP /* * tpm_st33_i2c_pm_suspend suspend the TPM device - * Added: Work around when suspend and no tpm application is running, suspend - * may fail because chip->data_buffer is not set (only set in tpm_open in Linux - * TPM core) * @param: client, the i2c_client drescription (TPM I2C description). * @param: mesg, the power management message. * @return: 0 in case of success. */ static int tpm_st33_i2c_pm_suspend(struct device *dev) { - struct tpm_chip *chip = dev_get_drvdata(dev); struct st33zp24_platform_data *pin_infos = dev->platform_data; int ret = 0; if (power_mgt) { gpio_set_value(pin_infos->io_lpcpd, 0); } else { - if (chip->data_buffer == NULL) - chip->data_buffer = pin_infos->tpm_i2c_buffer[0]; ret = tpm_pm_suspend(dev); } return ret; @@ -847,8 +841,6 @@ static int tpm_st33_i2c_pm_resume(struct device *dev) 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);