lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Tue, 19 May 2020 17:34:13 -0500
From:   Alex Elder <>
To:     Luis Chamberlain <>,
Cc:,,,,,,,,,,,,,,,,,,,,,,, Alex Elder <>
Subject: Re: [PATCH v2 10/15] soc: qcom: ipa: use new

On 5/15/20 4:28 PM, Luis Chamberlain wrote:
> This makes use of the new module_firmware_crashed() to help
> annotate when firmware for device drivers crash. When firmware
> crashes devices can sometimes become unresponsive, and recovery
> sometimes requires a driver unload / reload and in the worst cases
> a reboot.
> Using a taint flag allows us to annotate when this happens clearly.

I don't fully understand what this is meant to do, so I can't
fully assess whether it's the right thing to do.

But in this particular place in the IPA code, the *modem* has
crashed.  And the IPA driver is not responsible for modem
firmware, remoteproc is.

The IPA driver *can* be responsible for loading some other
firmware, but even in that case, it only happens on initial
boot, and it's basically assumed to never crash.

So regardless of whether this module_firmware_crashed() call is
appropriate in some places, I believe it should not be used here.


> Cc: Alex Elder <>
> Signed-off-by: Luis Chamberlain <>
> ---
>   drivers/net/ipa/ipa_modem.c | 1 +
>   1 file changed, 1 insertion(+)
> diff --git a/drivers/net/ipa/ipa_modem.c b/drivers/net/ipa/ipa_modem.c
> index ed10818dd99f..1790b87446ed 100644
> --- a/drivers/net/ipa/ipa_modem.c
> +++ b/drivers/net/ipa/ipa_modem.c
> @@ -285,6 +285,7 @@ static void ipa_modem_crashed(struct ipa *ipa)
>   	struct device *dev = &ipa->pdev->dev;
>   	int ret;
> +	module_firmware_crashed();
>   	ipa_endpoint_modem_pause_all(ipa, true);
>   	ipa_endpoint_modem_hol_block_clear_all(ipa);

Powered by blists - more mailing lists