Re: [PATCH] usb: atm: use request_firmware_direct() for firmware probing

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:

On Thu, 24 Sep 2026 08:06:54 +0300 you wrote:
> When disconnecting a device while firmware is not present on the system,
> usbatm_usb_disconnect() waits for the heavy_init thread to finish:
>     wait_for_completion(&instance->thread_exited);
> 
> If CONFIG_FW_LOADER_USER_HELPER_FALLBACK is enabled, missing firmware
> causes request_firmware() to fall back to sysfs/udevd. This creates a
> circular dependency during disconnect:
> 1. usb_disconnect() holds device_lock(&udev->dev).
> 2. usbatm_usb_disconnect() waits for instance->thread to exit.
> 3. instance->thread waits for request_firmware() sysfs fallback.
> 4. udevd receives the firmware uevent and attempts to read sysfs
>    attributes (e.g. serial), blocking on device_lock(&udev->dev).
> 
> [...]

Here is the summary with links:
  - usb: atm: use request_firmware_direct() for firmware probing
    https://git.kernel.org/netdev/net-next/c/f10883b37d9c

You are awesome, thank you!
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