Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

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

drivers/ieee1394/nodemgr.c

+6 −0
Original line number Diff line number Diff line
@@ -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;

}