On Friday 13 September 2013 20:54:37 Ondrej Zary wrote:
> On Thursday 12 September 2013 23:01:29 Ondrej Zary wrote:
> > The test for 2nd I/O port validity is broken (reversed):
> > On devices with no control port, the driver attempts to use invalid port
> > 0, resulting in logs full of bad_io_access errors.
> > On devices with control port, the driver does not use it.
> >
> > Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
> > ---
> > drivers/ata/pata_isapnp.c | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/ata/pata_isapnp.c b/drivers/ata/pata_isapnp.c
> > index 4bceb88..b33d1f9 100644
> > --- a/drivers/ata/pata_isapnp.c
> > +++ b/drivers/ata/pata_isapnp.c
> > @@ -78,7 +78,7 @@ static int isapnp_init_one(struct pnp_dev *idev, const
> > struct pnp_device_id *dev
> >
> > ap->ioaddr.cmd_addr = cmd_addr;
> >
> > - if (pnp_port_valid(idev, 1) == 0) {
> > + if (pnp_port_valid(idev, 1)) {
> > ctl_addr = devm_ioport_map(&idev->dev,
> > pnp_port_start(idev, 1), 1);
> > ap->ioaddr.altstatus_addr = ctl_addr;
>
> With this patch, the ATA port works fine if there is a device connected to
> it. However, it takes ages to boot if there are no devices connected. Looks
> like the driver retries IDENTIFY command for both slave and master drives
> in a hope that the devices are there.
>
> log:
>
> [ 7.692344] pata_isapnp 01:01.02: [io 0x01e8-0x01ef]
> [ 7.692474] pata_isapnp 01:01.02: [io 0x0168-0x016f]
> [ 7.692644] pata_isapnp 01:01.02: [irq 10]
> [ 7.695012] pata_isapnp 01:01.02: activated
> [ 7.751153] scsi2 : pata_isapnp
> [ 7.751781] ata3: PATA max PIO0 cmd 0x168 ctl 0x0 irq 10
> [ 12.751446] ata3.01: qc timeout (cmd 0xec)
> [ 12.751571] ata3.01: failed to IDENTIFY (I/O error, err_mask=0x5)
> [ 22.752270] ata3.01: qc timeout (cmd 0xec)
> [ 22.752396] ata3.01: failed to IDENTIFY (I/O error, err_mask=0x5)
> [ 52.754737] ata3.01: qc timeout (cmd 0xec)
> [ 52.754861] ata3.01: failed to IDENTIFY (I/O error, err_mask=0x5)
> [ 57.755149] ata3.00: qc timeout (cmd 0xec)
> [ 57.755275] ata3.00: failed to IDENTIFY (I/O error, err_mask=0x5)
> [ 67.755974] ata3.00: qc timeout (cmd 0xec)
> [ 67.756099] ata3.00: failed to IDENTIFY (I/O error, err_mask=0x5)
This is caused by skipping ata_sff_softreset() when ap->ioaddr.ctl_addr is
unset so ata_devchk() is never called. This patch seems to fix the problem.
Is it OK or can it cause more problems?
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2008,13 +2008,15 @@ static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
- /* software reset. causes dev0 to be selected */
- iowrite8(ap->ctl, ioaddr->ctl_addr);
- udelay(20); /* FIXME: flush */
- iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
- udelay(20); /* FIXME: flush */
- iowrite8(ap->ctl, ioaddr->ctl_addr);
- ap->last_ctl = ap->ctl;
+ if (ap->ioaddr.ctl_addr) {
+ /* software reset. causes dev0 to be selected */
+ iowrite8(ap->ctl, ioaddr->ctl_addr);
+ udelay(20); /* FIXME: flush */
+ iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
+ udelay(20); /* FIXME: flush */
+ iowrite8(ap->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = ap->ctl;
+ }
/* wait the port to become ready */
return ata_sff_wait_after_reset(&ap->link, devmask, deadline);
@@ -2215,10 +2217,6 @@ void ata_sff_error_handler(struct ata_port *ap)
spin_unlock_irqrestore(ap->lock, flags);
- /* ignore ata_sff_softreset if ctl isn't accessible */
- if (softreset == ata_sff_softreset && !ap->ioaddr.ctl_addr)
- softreset = NULL;
-
/* ignore built-in hardresets if SCR access is not available */
if ((hardreset == sata_std_hardreset ||
hardreset == sata_sff_hardreset) && !sata_scr_valid(&ap->link))
--
Ondrej Zary
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