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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2008-12-13 01:43:59 +0100 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2008-12-14 01:13:13 +0100 |
| commit | 25a41b280083259d05d68f61633194344a1f8a9f (patch) | |
| tree | e5a9af8f08e35a9bffbf9c61caf3b16ff8289dc9 /drivers | |
| parent | Linux 2.6.28-rc8 (diff) | |
| download | linux-25a41b280083259d05d68f61633194344a1f8a9f.tar.xz linux-25a41b280083259d05d68f61633194344a1f8a9f.zip | |
ieee1394: add quirk fix for Freecom HDD
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>
Diffstat (limited to 'drivers')
| -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 d333ae22459c..79ef5fd928ae 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; } |