From: "Michał Pecio" <michal.pecio@gmail.com>
To: Mathias Nyman <mathias.nyman@linux.intel.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 5/5] usb: xhci: Skip only one TD on Ring Underrun/Overrun
Date: Wed, 12 Feb 2025 08:30:07 +0100 [thread overview]
Message-ID: <20250212083007.04383b5d@foxbook> (raw)
In-Reply-To: <7bb25848-c80e-4ba8-8790-8628951806b3@linux.intel.com>
On Tue, 11 Feb 2025 17:41:39 +0200, Mathias Nyman wrote:
> > + if (ring_xrun_event) {
> > + /*
> > + * If we are here, we are on xHCI 1.0 host with no idea how
> > + * many TDs were missed and where the xrun occurred. Don't
> > + * skip more TDs, they may have been queued after the xrun.
> > + */
> > + xhci_dbg(xhci, "Skipped one TD for slot %u ep %u",
> > + slot_id, ep_index);
> > + break;
>
> This would be the same as return 0; right?
Currently, yes. I know it looks silly, but I thought it would be more
future proof than hardcoding 'return 0' into the loop. The point it to
simply stop iteration, what happens next is none of the loop's business.
I hope gcc is clever enough to do the right thing here.
Regards,
Michal
next prev parent reply other threads:[~2025-02-12 7:30 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-10 7:37 [PATCH 0/5] xHCI: Isochronous error handling fixes and improvements Michal Pecio
2025-02-10 7:38 ` [PATCH 1/5] usb: xhci: Complete 'error mid TD' transfers when handling Missed Service Michal Pecio
2025-02-10 7:39 ` [PATCH 2/5] usb: xhci: Clean up the TD skipping loop Michal Pecio
2025-02-22 12:37 ` Neronin, Niklas
2025-02-24 0:02 ` Michał Pecio
2025-02-10 7:40 ` [PATCH 3/5] usb: xhci: Fix isochronous Ring Underrun/Overrun event handling Michal Pecio
2025-02-10 7:41 ` [PATCH 4/5] usb: xhci: Expedite skipping missed isoch TDs on modern HCs Michal Pecio
2025-02-10 7:42 ` [PATCH 5/5] usb: xhci: Skip only one TD on Ring Underrun/Overrun Michal Pecio
2025-02-11 15:41 ` Mathias Nyman
2025-02-12 7:30 ` Michał Pecio [this message]
2025-02-21 1:17 ` Michał Pecio
2025-02-21 1:18 ` [PATCH v2 3/5] usb: xhci: Fix isochronous Ring Underrun/Overrun event handling Michal Pecio
2025-02-21 1:20 ` [PATCH v2 5/5] usb: xhci: Skip only one TD on Ring Underrun/Overrun Michal Pecio
2025-02-21 13:17 ` [PATCH " Mathias Nyman
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