From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: Michal Pecio <michal.pecio@gmail.com>
Cc: Mathias Nyman <mathias.nyman@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Niklas Neronin <niklas.neronin@linux.intel.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] usb: xhci: Simplify clearing the Event Interrupt bit
Date: Wed, 25 Mar 2026 14:27:54 +0200 [thread overview]
Message-ID: <8b94065d-b7b9-4964-803f-c2f2b58becb3@linux.intel.com> (raw)
In-Reply-To: <20260320212831.0bbabf25.michal.pecio@gmail.com>
On 3/20/26 22:28, Michal Pecio wrote:
> On Fri, 20 Mar 2026 21:18:09 +0100, Michal Pecio wrote:
>> Several other cards (VL805, FL1100, uPD720202, ASM1142, ASM3142) wake
>> from s2idle but not S3, including with a keyboard.
>>
>> No difference if this patch is reverted, no difference if PCD is
>> explicitly cleared in xhci_suspend(). And same problem in Windows.
>> Looks like a HW deficiency in those cards.
>
> Actually it's quite obvious: I know for sure that some of them derive
> Vbus from the 12V rail, and chances are that the others also do.
>
> Now I'm surprised that NEC and Etron cards bothered to make it work.
> Looks like PCIe cards aren't the best option for testing suspend.
Thanks for testing and clarifying
Adding this patch to queue
-Mathias
prev parent reply other threads:[~2026-03-25 12:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-04 10:42 [PATCH] usb: xhci: Simplify clearing the Event Interrupt bit Michal Pecio
2026-03-19 20:33 ` Mathias Nyman
2026-03-20 20:18 ` Michal Pecio
2026-03-20 20:28 ` Michal Pecio
2026-03-25 12:27 ` Mathias Nyman [this message]
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