Re: [PATCH] ata: libata-core: Add BRIDGE_OK quirk for QEMU drives

[Pedro Falcato]

On Wed, Mar 04, 2026 at 01:08:35PM +0100, Niklas Cassel wrote:
> Hello Pedro,
> 
> On Wed, Mar 04, 2026 at 11:23:01AM +0000, Pedro Falcato wrote:
> 
> (snip)
> 
> > So, does this look better?
> > 
> > diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
> > index d61846f03edc..c57e35ccc092 100644
> > --- a/drivers/ata/libata-core.c
> > +++ b/drivers/ata/libata-core.c
> > @@ -4231,6 +4231,7 @@ static const struct ata_dev_quirks_entry __ata_dev_quirks[] = {
> >         /* Devices that do not need bridging limits applied */
> >         { "MTRON MSP-SATA*",            NULL,   ATA_QUIRK_BRIDGE_OK },
> >         { "BUFFALO HD-QSU2/R5",         NULL,   ATA_QUIRK_BRIDGE_OK },
> > +       { "QEMU HARDDISK",              "2.5+", ATA_QUIRK_BRIDGE_OK },
> 
> Yes, I would prefer that.
> 
> When booting a device that has quirks applied, we will get prints in dmesg
> showing which quirks were applied.

Yeah, makes sense. Can you use this diff and add Cc: stable when applying,
or do you want me to send a v2?

> 
> It would be nice if we could avoid applying quirks for QEMU when (sometime
> in the future) a newer version of QEMU is available that does the right
> thing.

On it :)

Thanks!
-- 
Pedro