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authorMaxim Levitsky <maximlevitsky@gmail.com>2010-11-29 05:09:49 +0300
committerStefan Richter <stefanr@s5r6.in-berlin.de>2010-12-13 22:39:15 +0300
commit8662b6b029636c35e5876e184d90daf6b0072667 (patch)
tree448ac2fb1db32087cb414f9f00ca420fc6ac3d7e /drivers/firewire
parentec766a7970126f99665992c0b0b10bd60a4d6208 (diff)
downloadlinux-8662b6b029636c35e5876e184d90daf6b0072667.tar.xz
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 <maximlevitsky@gmail.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/ohci.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index eb7b591e1c1b..3a908038ff62 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