From: Greg KH <gregkh@linuxfoundation.org>
To: Puma Hsu <pumahsu@google.com>
Cc: mathias.nyman@intel.com, albertccwang@google.com,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] xhci: re-initialize the HC during resume if HCE was set
Date: Tue, 28 Dec 2021 09:26:28 +0100 [thread overview]
Message-ID: <YcrKNP4TRXB6nsCI@kroah.com> (raw)
In-Reply-To: <20211228060246.2958070-1-pumahsu@google.com>
On Tue, Dec 28, 2021 at 02:02:46PM +0800, Puma Hsu wrote:
> When HCE(Host Controller Error) is set, it means an internal
> error condition has been detected. It needs to re-initialize
> the HC too.
>
> Signed-off-by: Puma Hsu <pumahsu@google.com>
> ---
> drivers/usb/host/xhci.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
> index dc357cabb265..c546d9533410 100644
> --- a/drivers/usb/host/xhci.c
> +++ b/drivers/usb/host/xhci.c
> @@ -1146,8 +1146,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
> temp = readl(&xhci->op_regs->status);
> }
>
> - /* If restore operation fails, re-initialize the HC during resume */
> - if ((temp & STS_SRE) || hibernated) {
> + /* If restore operation fails or HC error is detected, re-initialize the HC during resume */
> + if ((temp & STS_SRE) || (temp & STS_HCE) || hibernated) {
>
> if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) &&
> !(xhci_all_ports_seen_u0(xhci))) {
> --
> 2.34.1.448.ga2b2bfdf31-goog
>
What commit does this fix? Does it need to be backported to older
kernels as well?
thanks,
greg k-h
next prev parent reply other threads:[~2021-12-28 8:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-28 6:02 [PATCH] xhci: re-initialize the HC during resume if HCE was set Puma Hsu
2021-12-28 8:26 ` Greg KH [this message]
2021-12-29 5:53 ` Puma Hsu
2021-12-29 8:30 ` Greg KH
2021-12-29 9:11 ` Puma Hsu
2021-12-29 9:51 ` Greg KH
2021-12-29 10:21 ` Puma Hsu
2021-12-29 10:37 ` Greg KH
2021-12-28 14:34 ` Sergey Shtylyov
2021-12-29 5:55 ` Puma Hsu
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