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* [PATCH] parisc: Hide built-in serial aux port of Tosca GSP card
@ 2018-12-26 19:46 Helge Deller
  0 siblings, 0 replies; 1+ messages in thread
From: Helge Deller @ 2018-12-26 19:46 UTC (permalink / raw)
  To: linux-parisc, James Bottomley, John David Anglin

Similar to commit bcf3f1752a62 ("parisc: Hide Diva-built-in serial aux and
graphics card") it's better to hide the built-in serial AUX port at bootup.
When not hiding the port, the Linux serial driver will try to manage this port
and fails on a A500 server like this:

 serial 0000:00:05.0: enabling device (0000 -> 0003)
 serial 0000:00:05.0: enabling SERR and PARITY (0003 -> 0143)
 0000:00:05.0: ttyS3 at MMIO 0xfffffffff8005000 (irq = 71, base_baud = 115200) is a 16550A
 serial 0000:00:05.0: Couldn't register serial port 0, irq 71, type 2, error -28

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c
index 69bd98421eb1..d376201bc6a0 100644
--- a/drivers/parisc/lba_pci.c
+++ b/drivers/parisc/lba_pci.c
@@ -1743,3 +1743,15 @@ static void quirk_diva_aux_disable(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA_AUX,
 	quirk_diva_aux_disable);
+
+static void quirk_tosca_aux_disable(struct pci_dev *dev)
+{
+	if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
+	    dev->subsystem_device != 0x104a)
+		return;
+
+	dev_info(&dev->dev, "Hiding Tosca secondary built-in AUX serial device");
+	dev->device = 0;
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA,
+	quirk_tosca_aux_disable);

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2018-12-26 19:46 [PATCH] parisc: Hide built-in serial aux port of Tosca GSP card Helge Deller

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