2019-08-27 06:07:31

by Harald Dunkel

Subject: fsck on ext4: "WARN Wrong bounce buffer write length: 1024 != 0"

FYI: "fsck -y" on an external USB drive (USB-C, ext4) gave
me a ton of messages

:
[ 191.261939] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
[ 191.263743] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
[ 191.263788] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
[ 191.263840] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
[ 191.266857] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
:

Related to 597c56e372dab2c7f79b8d700aad3a5deebf9d1b, AFAICT.

Kernel is 4.19.67-1 (Debian proposed-updates).


Regards
Harri

2019-08-27 16:38:33

by Theodore Ts'o

Subject: Re: fsck on ext4: "WARN Wrong bounce buffer write length: 1024 != 0"

On Tue, Aug 27, 2019 at 08:00:14AM +0200, Harald Dunkel wrote:
> FYI: "fsck -y" on an external USB drive (USB-C, ext4) gave
> me a ton of messages
>
> :
> [ 191.261939] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
> [ 191.263743] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
> [ 191.263788] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
> [ 191.263840] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
> [ 191.266857] xhci_hcd 0000:05:00.0: WARN Wrong bounce buffer write length: 1024 != 0
> :
>
> Related to 597c56e372dab2c7f79b8d700aad3a5deebf9d1b, AFAICT.
>
> Kernel is 4.19.67-1 (Debian proposed-updates).

[email protected], [email protected]
linux-ext4 to BCC

That's a USB XHCI issue, not an ext4 issue. I'm handing this to the
XHCI maintainer and the Linux USB mailing list.

Cheers,

- Ted