linux-kernel - Re: kernel oops in 'typec_ucsi' due to commit 'drivers property: When no children in primary, try secondary'

lists.openwall.net		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 linux-cve-announce 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]

Message-ID: <fdbc12dc79ed73c00d37d5b60c00afc3d7e3f556.camel@redhat.com>
Date:   Thu, 16 Jul 2020 11:47:09 +0300
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, andriy.shevchenko@...ux.intel.com,
        rafael.j.wysocki@...el.com, sakari.ailus@...ux.intel.com,
        heikki.krogerus@...ux.intel.com
Subject: Re: kernel oops in 'typec_ucsi' due to commit 'drivers property:
 When no children in primary, try secondary'

On Thu, 2020-07-16 at 10:28 +0200, Greg KH wrote:
> On Thu, Jul 16, 2020 at 11:17:03AM +0300, Maxim Levitsky wrote:
> > Hi!
> > 
> > Few days ago I bisected a regression on 5.8 kernel:
> > 
> > I have nvidia rtx 2070s and its USB type C port driver (which is open source)
> 
> Is that driver merged into the tree?  If not, do you have a pointer to
> it somewhere?
> 
> thanks,
> 
> greg k-h
> 
It is in the tree.

CONFIG_TYPEC_UCSI selectes the generic UCSI driver
CONFIG_UCSI_CCG selects the hardware driver,
which is an i2c driver which binds to an i2c device (I think with address 0x8)
on an i2c controller, which is exposed by function 3 of the NVIDIA card, and uses the
CONFIG_I2C_NVIDIA_GPU driver.

We also have CONFIG_TYPEC_NVIDIA_ALTMODE which I haven't researched
what it does.

Best regards,
	Maxim Levitsky