[patch 17/22] ieee1394: add quirk fix for Freecom HDD

Greg KH
2008-12-17T00:10:21Z

[-- Attachment #1: ieee1394-add-quirk-fix-for-freecom-hdd.patch --]
[-- Type: text/plain, Size: 1162 bytes --]

2.6.27-stable review patch. If anyone has any objections, please let us know.

------------------

From: Stefan Richter <stefanr@s5r6.in-berlin.de>

commit 25a41b280083259d05d68f61633194344a1f8a9f upstream.

According to http://bugzilla.kernel.org/show_bug.cgi?id=12206, Freecom
FireWire Hard Drive 1TB reports max_rom=2 but returns garbage if block
read requests are used to read the config ROM. Force max_rom=0 to limit
them to quadlet read requests.

Reported-by: Christian Mueller <cm1@mumac.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/ieee1394/nodemgr.c | 6 ++++++
1 file changed, 6 insertions(+)

--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -115,8 +115,14 @@ static int nodemgr_bus_read(struct csr12
return error;
}

+#define OUI_FREECOM_TECHNOLOGIES_GMBH 0x0001db
+
static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
{
+ /* Freecom FireWire Hard Drive firmware bug */
+ if (be32_to_cpu(bus_info_data[3]) >> 8 == OUI_FREECOM_TECHNOLOGIES_GMBH)
+ return 0;
+
return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3;
}