From 8662b6b029636c35e5876e184d90daf6b0072667 Mon Sep 17 00:00:00 2001 From: Maxim Levitsky Date: Mon, 29 Nov 2010 04:09:49 +0200 Subject: [PATCH] firewire: ohci: restore GUID on resume. Some lousy BIOSes, e.g. my Aspire 5720 BIOS forget to restore the GUID register on resume from RAM. Fix that by setting it to the last value that was read from it. Signed-off-by: Maxim Levitsky Signed-off-by: Stefan Richter --- drivers/firewire/ohci.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index eb7b591e1c1..3a908038ff6 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -3284,6 +3284,13 @@ static int pci_resume(struct pci_dev *dev) return err; } + /* Some systems don't setup GUID register on resume from ram */ + if (!reg_read(ohci, OHCI1394_GUIDLo) && + !reg_read(ohci, OHCI1394_GUIDHi)) { + reg_write(ohci, OHCI1394_GUIDLo, (u32)ohci->card.guid); + reg_write(ohci, OHCI1394_GUIDHi, (u32)(ohci->card.guid >> 32)); + } + return ohci_enable(&ohci->card, NULL, 0); } #endif -- 2.46.0