The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 1398aa803f198b7a386fdd8404666043e95f4c16 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '2023052208-chirping-preset-9644@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 1398aa803f19 ("tpm_tis: Use tpm_chip_{start,stop} decoration inside tpm_tis_resume") 955df4f87760 ("tpm, tpm_tis: Claim locality when interrupts are reenabled on resume") 7a2f55d0be29 ("tpm, tpm: Implement usage counter for locality") e87fcf0dc2b4 ("tpm, tpm_tis: Only handle supported interrupts") 15d7aa4e46eb ("tpm, tpm_tis: Claim locality before writing interrupt registers") ed9be0e6c892 ("tpm, tpm_tis: Do not skip reset of original interrupt vector") 6d789ad72695 ("tpm, tpm_tis: Disable interrupts if tpm_tis_probe_irq() failed") 282657a8bd7f ("tpm, tpm_tis: Claim locality before writing TPM_INT_ENABLE register") 858e8b792d06 ("tpm, tpm_tis: Avoid cache incoherency in test for interrupts") 7bfda9c73fa9 ("tpm: Add flag to use default cancellation policy") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1398aa803f198b7a386fdd8404666043e95f4c16 Mon Sep 17 00:00:00 2001 From: Jarkko Sakkinen <jarkko@xxxxxxxxxx> Date: Wed, 26 Apr 2023 20:29:27 +0300 Subject: [PATCH] tpm_tis: Use tpm_chip_{start,stop} decoration inside tpm_tis_resume Before sending a TPM command, CLKRUN protocol must be disabled. This is not done in the case of tpm1_do_selftest() call site inside tpm_tis_resume(). Address this by decorating the calls with tpm_chip_{start,stop}, which should be always used to arm and disarm the TPM chip for transmission. Finally, move the call to the main TPM driver callback as the last step because it should arm the chip by itself, if it needs that type of functionality. Cc: stable@xxxxxxxxxxxxxxx Reported-by: Jason A. Donenfeld <Jason@xxxxxxxxx> Closes: https://lore.kernel.org/linux-integrity/CS68AWILHXS4.3M36M1EKZLUMS@suppilovahvero/ Fixes: a3fbfae82b4c ("tpm: take TPM chip power gating out of tpm_transmit()") Reviewed-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx> Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx> diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 02945d53fcef..558144fa707a 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -1209,25 +1209,20 @@ static void tpm_tis_reenable_interrupts(struct tpm_chip *chip) u32 intmask; int rc; - if (chip->ops->clk_enable != NULL) - chip->ops->clk_enable(chip, true); - - /* reenable interrupts that device may have lost or - * BIOS/firmware may have disabled + /* + * Re-enable interrupts that device may have lost or BIOS/firmware may + * have disabled. */ rc = tpm_tis_write8(priv, TPM_INT_VECTOR(priv->locality), priv->irq); - if (rc < 0) - goto out; + if (rc < 0) { + dev_err(&chip->dev, "Setting IRQ failed.\n"); + return; + } intmask = priv->int_mask | TPM_GLOBAL_INT_ENABLE; - - tpm_tis_write32(priv, TPM_INT_ENABLE(priv->locality), intmask); - -out: - if (chip->ops->clk_enable != NULL) - chip->ops->clk_enable(chip, false); - - return; + rc = tpm_tis_write32(priv, TPM_INT_ENABLE(priv->locality), intmask); + if (rc < 0) + dev_err(&chip->dev, "Enabling interrupts failed.\n"); } int tpm_tis_resume(struct device *dev) @@ -1235,27 +1230,27 @@ int tpm_tis_resume(struct device *dev) struct tpm_chip *chip = dev_get_drvdata(dev); int ret; - ret = tpm_tis_request_locality(chip, 0); - if (ret < 0) + ret = tpm_chip_start(chip); + if (ret) return ret; if (chip->flags & TPM_CHIP_FLAG_IRQ) tpm_tis_reenable_interrupts(chip); - ret = tpm_pm_resume(dev); - if (ret) - goto out; - /* * 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)) tpm1_do_selftest(chip); -out: - tpm_tis_relinquish_locality(chip, 0); - return ret; + tpm_chip_stop(chip); + + ret = tpm_pm_resume(dev); + if (ret) + return ret; + + return 0; } EXPORT_SYMBOL_GPL(tpm_tis_resume); #endif
