diff options
| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2008-12-16 20:35:13 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-12-18 09:13:38 -0800 |
| commit | a5330d7ca215757e9949e31f0bb88214f41fd413 (patch) | |
| tree | 4466f9f3cbaf583e746dd5bdb96cefca8c741e53 | |
| parent | bc7c91468b80aab044dd9dd61c3492cf57dffabb (diff) | |
ieee1394: add quirk fix for Freecom HDD
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>
| -rw-r--r-- | drivers/ieee1394/nodemgr.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c index 16240a789650..3d3c3bc8ad04 100644 --- a/drivers/ieee1394/nodemgr.c +++ b/drivers/ieee1394/nodemgr.c @@ -115,8 +115,14 @@ static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, 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; } |