From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: Michal Pecio <michal.pecio@gmail.com>,
Mathias Nyman <mathias.nyman@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] usb: xhci: Fix a format bug
Date: Fri, 31 Oct 2025 17:00:42 +0200 [thread overview]
Message-ID: <2797d75d-693f-4a99-9465-a340f956cc4f@linux.intel.com> (raw)
In-Reply-To: <20251016182813.3d10a8a3.michal.pecio@gmail.com>
On 10/16/25 19:28, Michal Pecio wrote:
> The width of 'addr' depends on kernel configuration and gibberish is
> printed in traces and dynamic debug on some 32 bit systems like ARM:
>
> Removing canceled TD starting at 0xf9c96eb0 (dma) in stream 0 URB 54e247b5
> Set TR Deq ptr 0x205400000000000, cycle 0
>
> Successful Set TR Deq Ptr cmd, deq = @f9c96ef0
>
> Fix it by casting to 64 bits. No effect on unaffected systems.
> Remove the newline which casuses an empty line to appear next.
>
> Fixes: d1dbfb942c33 ("xhci: introduce a new move_dequeue_past_td() function to replace old code.")
> Cc: stable@vger.kernel.org
> Signed-off-by: Michal Pecio <michal.pecio@gmail.com>
> ---
> drivers/usb/host/xhci-ring.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
> index c7f658d446cd..6d799a5a062d 100644
> --- a/drivers/usb/host/xhci-ring.c
> +++ b/drivers/usb/host/xhci-ring.c
> @@ -776,7 +776,7 @@ static int xhci_move_dequeue_past_td(struct xhci_hcd *xhci,
> ep->queued_deq_ptr = new_deq;
>
> xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
> - "Set TR Deq ptr 0x%llx, cycle %u\n", addr, new_cycle);
> + "Set TR Deq ptr 0x%llx, cycle %u", (u64) addr, new_cycle);
Why not %pad and &addr instead?
Thanks
Mathias
next prev parent reply other threads:[~2025-10-31 15:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-16 16:28 [PATCH 1/2] usb: xhci: Fix a format bug Michal Pecio
2025-10-16 16:29 ` [PATCH 2/2] usb: xhci: Type check xhci_dbg_trace() Michal Pecio
2025-10-31 15:00 ` Mathias Nyman [this message]
2025-10-31 17:54 ` [PATCH 1/2] usb: xhci: Fix a format bug Michal Pecio
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