Re: Buffer I/O error after s2ram with usb storage

From: Alan Stern
Date: Wed Aug 27 2014 - 10:55:01 EST

On Wed, 27 Aug 2014, Matthieu CASTET wrote:

> Ping
> I have got also a problem with a usb sdcard reader (without power cut
> during suspend)

> > > The usb storage driver call scsi_report_bus_reset after device reset,
> > > but because of commit dfcf7775 <4>, we don't ignore unit attention if
> > > "sshdr.asc == 0x28 && sshdr.ascq == 0x00" ("Not-ready to ready").
> > >
> > > If dfcf7775 is reverted there is no more Buffer I/O error.
> > >
> > > Is that possible to find a way to restore the behavior before dfcf7775
> > > commit (no Buffer I/O error after device reset) after a suspend to ram ?

Since that commit was written to fix a problem with certain cdrom
drives, maybe we would work around the issue by modifying the commit.
Have it go back to the original behavior if the device isn't a cdrom

That's not a complete fix (it won't help when a CD drive is attached
via USB), but maybe it's better than nothing.

Alan Stern

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at