kernel/git/next/linux-next.git/drivers/char/hw_random, branch master

hwrng: imx-rngc - check clk_prepare_enable() return value

2026-09-11T05:03:03+00:00

The driver ignored clk_prepare_enable() failures during probe and resume. If enabling the RNG clock fails, subsequent register accesses or resume after system sleep may not work while the driver still reports success. Signed-off-by: Li Youhong Reviewed-by: Frank Li Reviewed-by: Martin Kaiser Signed-off-by: Herbert Xu

hwrng: omap - Convert to DEFINE_SIMPLE_DEV_PM_OPS()

2026-09-11T05:03:03+00:00

Convert the deprecated SIMPLE_DEV_PM_OPS to DEFINE_SIMPLE_DEV_PM_OPS and pm_sleep_ptr(). This lets us drop the __maybe_unused annotations from its suspend and resume callbacks, and reduces kernel size in case CONFIG_PM or CONFIG_PM_SLEEP is disabled. Signed-off-by: Triet Hoang Signed-off-by: Herbert Xu

hwrng: cctrng - Fix runtime PM usage counter leak

2026-09-04T09:49:32+00:00

pm_runtime_get_sync() increments the device usage counter even when runtime resume fails. cctrng_read() propagates errors from cc_trng_pm_get() without scheduling the work that later drops the counter, so a clock or reset-completion failure in cctrng_resume() leaves the counter elevated. Use pm_runtime_resume_and_get(), which drops the usage counter when resume fails and returns zero on success. This preserves the existing success path while balancing the error path. This issue was found by a static analysis checker and confirmed by manual source review. Fixes: a583ed310bb6 ("hwrng: cctrng - introduce Arm CryptoCell driver") Signed-off-by: Ruoyu Wang Signed-off-by: Herbert Xu

Merge tag 'v7.3-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2026-08-20T00:25:42+00:00

Pull crypto update from Herbert Xu: "API: - Add af_alg_restrict sysctl and white list - Fix potential suspend/resume races in hwrng Algorithms: - Optimize vli additive operations using compiler builtins in ecc Drivers: - Remove unsafe/deprecated algorithms from qce - Mark qce as BROKEN - Add runtime PM and interconnect bandwidth scaling support to qce - Remove crypto_rng from qcom, sun8i and caam - Fix SG list issues in iaa - Fix SEV init path bugs in ccp" * tag 'v7.3-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (122 commits) crypto: lskcipher - propagate errors from unaligned crypt crypto: keembay - use crypto_memneq() to compare CCM AEAD tags crypto: keembay - use crypto_memneq() to compare GCM AEAD tags crypto: sa2ul - use crypto_memneq() to compare AEAD tag hwrng: drivers - use named initializers for acpi_device_id crypto: qce - fix CCM AAD buffer underallocation crypto: iaa - unmap dst before software fallback on decompress crypto: iaa - use bounce buffer for multi-sg decompress input crypto: iaa - avoid counting fallback decompression bytes crypto: iaa - fall back to software for multi-entry scatterlists hwrng: core - Stop/start hwrng_fillfn() kthread before/after suspend-resume crypto: hisilicon/sec2 - fix CCM algorithm long packet failure crypto: eip93 - use struct_size() and flexible array for ring allocation crypto: krb5 - use kfree_sensitive() for derived key buffers crypto: af_alg - Stop after finding name in allowlist crypto: af_alg - Replace 'bool privileged' with flags crypto: af_alg - Make cbc(paes) privileged-only hwrng: imx-rngc - Disable clock on registration failure crypto: qat - remove dead ADF_HEX code crypto: qce - simplify qce_handle_request ...

hwrng: drivers - use named initializers for acpi_device_id

2026-08-15T01:28:36+00:00

Use a named initializer for the acpi_device_id fields which makes the code more readable and consistent with how lists are initialized in the rest of the kernel code base. Also drop explicitly setting fields to 0 where it is redundant. Signed-off-by: Pawel Zalewski (The Capable Hub) Signed-off-by: Herbert Xu

hwrng: core - Stop/start hwrng_fillfn() kthread before/after suspend-resume

2026-08-15T01:24:10+00:00

The hwrng_fillfn() kernel thread accesses the RNG device directly. During suspend and resume sequences, hwrng_fillfn() may attempt to access the RNG device while it is suspended. To address this, the hwrng_fillfn() kernel thread is stopped before suspend, and restarted after resume. This is done using the pm_notifier mechanism. Issue was found while doing suspend-to-ram on J721S2 EVM board with omap-rng driver. echo mem > /sys/power/state [ 27.922259] PM: suspend entry (deep) [ 27.927191] Filesystems sync: 0.000 seconds [ 27.933858] Freezing user space processes [ 27.939119] Freezing user space processes completed (elapsed 0.001 seconds) [ 27.946090] OOM killer disabled. [ 27.949315] Freezing remaining freezable tasks [ 27.954887] Freezing remaining freezable tasks completed (elapsed 0.001 seconds) [ 27.963337] GFP mask restricted [ 27.967069] omap_rng 4e10000.rng: PM: calling platform_pm_suspend @ 195, parent: 4e00000.crypto [ 27.967072] mmcblk mmc1:9fb0: PM: calling mmc_bus_suspend @ 122, parent: mmc1 [ 27.968636] mmcblk mmc1:9fb0: PM: mmc_bus_suspend returned 0 after 1546 usecs [ 27.975778] omap_rng 4e10000.rng: PM: platform_pm_suspend returned 0 after 3 usecs ... [ 33.510667] ti-sci 44083000.system-controller: PM: ti_sci_suspend_noirq returned 0 after 0 usecs [ 33.510671] SError Interrupt on CPU0, code 0x00000000bf000000 -- SError [ 33.510681] CPU: 0 UID: 0 PID: 132 Comm: hwrng Tainted: G M W 7.0.0-12695-g8923b7a6e11d #19 PREEMPT [ 33.510690] Tainted: [M]=MACHINE_CHECK, [W]=WARN [ 33.510693] Hardware name: Texas Instruments J721S2 EVM (DT) [ 33.510697] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 33.510701] pc : omap_rng_do_read+0x3c/0xe0 [ 33.510709] lr : omap_rng_do_read+0x58/0xe0 [ 33.510712] sp : ffff80008942be00 [ 33.510713] x29: ffff80008942be00 x28: 0000000000000000 x27: 0000000000000000 [ 33.510719] x26: 0000000000000010 x25: 0000000000000010 x24: ffff0008065644e8 [ 33.510724] x23: ffff8000878b3370 x22: ffff00080148b2c0 x21: 0000000000000000 [ 33.510728] x20: ffff000806564480 x19: 0000000000000064 x18: 0000000000000000 [ 33.510732] x17: 6573752031207265 x16: 7466612030206465 x15: 6e72757465722071 [ 33.510737] x14: ffff0008062c8080 x13: 000031702bc0da42 x12: 0000000000000001 [ 33.510741] x11: 00000000000000c0 x10: 0000000000000b30 x9 : ffff80008942bc80 [ 33.510745] x8 : ffff0008062c8b90 x7 : ffff000b7dfa34c0 x6 : 0000000805ca16c1 [ 33.510749] x5 : 0000000000000000 x4 : ffff800080e17bfc x3 : ffff800087389c68 [ 33.510753] x2 : 0000000000000000 x1 : 0000000000000010 x0 : 000000000000a7c6 [ 33.510759] Kernel panic - not syncing: Asynchronous SError Interrupt [ 33.510762] CPU: 0 UID: 0 PID: 132 Comm: hwrng Tainted: G M W 7.0.0-12695-g8923b7a6e11d #19 PREEMPT [ 33.510767] Tainted: [M]=MACHINE_CHECK, [W]=WARN [ 33.510768] Hardware name: Texas Instruments J721S2 EVM (DT) [ 33.510770] Call trace: [ 33.510772] show_stack+0x18/0x24 (C) [ 33.510780] dump_stack_lvl+0x34/0x8c [ 33.510788] dump_stack+0x18/0x24 [ 33.510792] vpanic+0x47c/0x4dc [ 33.510799] do_panic_on_target_cpu+0x0/0x1c [ 33.510803] add_taint+0x0/0xbc [ 33.510807] arm64_serror_panic+0x70/0x80 [ 33.510812] do_serror+0x3c/0x70 [ 33.510815] el1h_64_error_handler+0x34/0x50 [ 33.510823] el1h_64_error+0x6c/0x70 [ 33.510827] omap_rng_do_read+0x3c/0xe0 (P) [ 33.510831] hwrng_fillfn+0x98/0x330 [ 33.510834] kthread+0x130/0x13c [ 33.510845] ret_from_fork+0x10/0x20 [ 33.510850] SMP: stopping secondary CPUs [ 33.519442] Kernel Offset: disabled [ 33.519444] CPU features: 0x04000000,800a0008,00040001,0400421b [ 33.519448] Memory Limit: none [ 33.732904] ---[ end Kernel panic - not syncing: Asynchronous SError Interrupt ]--- Signed-off-by: Thomas Richard (TI) Signed-off-by: Herbert Xu

hwrng: imx-rngc - Disable clock on registration failure

2026-08-10T08:34:21+00:00

The RNGC clock is enabled manually before runtime PM is configured. If devm_hwrng_register() fails, probe returns without disabling the clock. The devm_pm_runtime_enable() cleanup only disables runtime PM and does not call imx_rngc_suspend(). Disable the clock before returning from this failure path. Fixes: 7a96a64e8689 ("hwrng: imx-rngc - add runtime pm") Signed-off-by: Yuho Choi Reviewed-by: Martin Kaiser Signed-off-by: Herbert Xu

hwrng: stm32 - Fix runtime PM cleanup on registration failure

2026-07-27T00:29:27+00:00

stm32_rng_probe() enables autosuspend and runtime PM before registering the hwrng. If devm_hwrng_register() fails, probe returns with runtime PM left enabled and autosuspend still selected. The remove callback also only disables runtime PM and does not undo pm_runtime_use_autosuspend(). Use devm_pm_runtime_enable() so runtime PM is unwound automatically on probe failure and driver detach. Since the managed cleanup also disables runtime PM,drop the remove callback. Fixes: c6a97c42e399 ("hwrng: stm32 - add support for STM32 HW RNG") Cc: stable@vger.kernel.org Signed-off-by: Can Peng Reviewed-by: Linus Walleij Signed-off-by: Herbert Xu

hwrng: omap - Enable on Renesas RZ/N1D

2026-07-17T08:09:22+00:00

The Kconfig symbol and associated seem to be badly named as they have nothing OMAP specific but instead refer to Inside Secure Safexcel devices which have been used in many SoCs from different manufacturers (like OMAP, Marvell but also eg. Renesas). The Renesas RZ/N1D features this IP, so add this architecture to the dependency allow list. In practice this dependency list does not seem very relevant and could be entirely dropped, given the fact that this IP has been implemented by many different vendors and seems to be architecture agnostic. Signed-off-by: Miquel Raynal (Schneider Electric) Reviewed-by: Wolfram Sang Signed-off-by: Herbert Xu

hwrng: drivers - Remove redundant dev_err()/dev_err_probe()

2026-07-17T08:09:22+00:00

Since commit 55b48e23f5c4 ("genirq/devres: Add error handling in devm_request_*_irq()"), devm_request_irq() automatically logs detailed error messages on failure. Remove the now-redundant driver-specific dev_err() and dev_err_probe() calls. Signed-off-by: Pan Chuang Signed-off-by: Herbert Xu