Commit 25a41b28 authored by Stefan Richter's avatar Stefan Richter

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: default avatarChristian Mueller <cm1@mumac.de>
Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent 8b1fae4e
...@@ -115,8 +115,14 @@ static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, ...@@ -115,8 +115,14 @@ static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
return error; return error;
} }
#define OUI_FREECOM_TECHNOLOGIES_GMBH 0x0001db
static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) 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; return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3;
} }
......
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