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authorStefan Richter <stefanr@s5r6.in-berlin.de>2008-12-12 19:43:59 -0500
committerStefan Richter <stefanr@s5r6.in-berlin.de>2008-12-13 19:13:13 -0500
commit25a41b280083259d05d68f61633194344a1f8a9f (patch)
treee5a9af8f08e35a9bffbf9c61caf3b16ff8289dc9 /drivers
parent8b1fae4e4200388b64dd88065639413cb3f1051c (diff)
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.c6
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,
115 return error; 115 return error;
116} 116}
117 117
118#define OUI_FREECOM_TECHNOLOGIES_GMBH 0x0001db
119
118static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) 120static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
119{ 121{
122 /* Freecom FireWire Hard Drive firmware bug */
123 if (be32_to_cpu(bus_info_data[3]) >> 8 == OUI_FREECOM_TECHNOLOGIES_GMBH)
124 return 0;
125
120 return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3; 126 return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3;
121} 127}
122 128