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authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-14 12:00:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-14 12:00:42 -0700
commit37e79a43acf963676fc358e7c9154c0d42c4f569 (patch)
tree6405c3143fe24a1d5cf028fae3e23e7d38848321
parentf1823acfbcc7d29029d6db757644bc820664af37 (diff)
parente9c1670c2a14ef9cc20d86b24b829f3947aad34e (diff)
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: ata_piix: add workaround for Samsung DB-P70 libata: Keep shadow last_ctl up to date during resets sata_mv: fix MSI irq race condition
-rw-r--r--drivers/ata/ata_piix.c37
-rw-r--r--drivers/ata/libata-sff.c6
-rw-r--r--drivers/ata/sata_mv.c3
3 files changed, 44 insertions, 2 deletions
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 54961c0b2c7..ef8b30d577b 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1289,6 +1289,39 @@ static const int *__devinit piix_init_sata_map(struct pci_dev *pdev,
return map;
}
+static bool piix_no_sidpr(struct ata_host *host)
+{
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+
+ /*
+ * Samsung DB-P70 only has three ATA ports exposed and
+ * curiously the unconnected first port reports link online
+ * while not responding to SRST protocol causing excessive
+ * detection delay.
+ *
+ * Unfortunately, the system doesn't carry enough DMI
+ * information to identify the machine but does have subsystem
+ * vendor and device set. As it's unclear whether the
+ * subsystem vendor/device is used only for this specific
+ * board, the port can't be disabled solely with the
+ * information; however, turning off SIDPR access works around
+ * the problem. Turn it off.
+ *
+ * This problem is reported in bnc#441240.
+ *
+ * https://bugzilla.novell.com/show_bug.cgi?id=441420
+ */
+ if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2920 &&
+ pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
+ pdev->subsystem_device == 0xb049) {
+ dev_printk(KERN_WARNING, host->dev,
+ "Samsung DB-P70 detected, disabling SIDPR\n");
+ return true;
+ }
+
+ return false;
+}
+
static int __devinit piix_init_sidpr(struct ata_host *host)
{
struct pci_dev *pdev = to_pci_dev(host->dev);
@@ -1302,6 +1335,10 @@ static int __devinit piix_init_sidpr(struct ata_host *host)
if (hpriv->map[i] == IDE)
return 0;
+ /* is it blacklisted? */
+ if (piix_no_sidpr(host))
+ return 0;
+
if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR))
return 0;
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 714cb046b59..f93dc029dfd 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2066,6 +2066,7 @@ static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
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);
@@ -2190,8 +2191,10 @@ void ata_sff_postreset(struct ata_link *link, unsigned int *classes)
}
/* set up device control */
- if (ap->ioaddr.ctl_addr)
+ if (ap->ioaddr.ctl_addr) {
iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
+ ap->last_ctl = ap->ctl;
+ }
}
EXPORT_SYMBOL_GPL(ata_sff_postreset);
@@ -2534,6 +2537,7 @@ void ata_bus_reset(struct ata_port *ap)
if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
/* set up device control for ATA_FLAG_SATA_RESET */
iowrite8(ap->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = ap->ctl;
}
DPRINTK("EXIT\n");
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 7007edd2d45..74b1080d116 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2218,12 +2218,13 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance)
else
handled = mv_host_intr(host, pending_irqs);
}
- spin_unlock(&host->lock);
/* for MSI: unmask; interrupt cause bits will retrigger now */
if (using_msi)
writel(hpriv->main_irq_mask, hpriv->main_irq_mask_addr);
+ spin_unlock(&host->lock);
+
return IRQ_RETVAL(handled);
}