OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

firewire: ohci: add module parameter to activate quirk fixes 

This way, we can advise users of precompiled kernel packages to test
existing quirk fixes on chips which have not been listed yet, without
them having to build a kernel from source.

Note, to use this feature on a machine with more than one controller,
steps like these are necessary:
# lspci | grep 1394
# ls /sys/bus/pci/drivers/firewire_ohci/
# echo -n "0000:03:02.0" > /sys/bus/pci/drivers/firewire_ohci/unbind
# echo 2 > /sys/module/firewire_ohci/parameters/quirks
# echo -n "0000:03:02.0" > /sys/bus/pci/drivers/firewire_ohci/bind
# echo 0 > /sys/module/firewire_ohci/parameters/quirks

The parameter can also be used to switch off quirk flags that were
hardwired into firewire-ohci's quirks table.  Simply specify a non-zero
quirks value but without any known flags, e.g. 0x100.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2010-02-21 17:58:29 +01:00
parent 4a635593f4
commit 3e9cc2f3b7
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/firewire/ohci.c
View File

@ -246,6 +246,15 @@ static const struct {
{PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS},
};
/* This overrides anything that was found in ohci_quirks[]. */
static int param_quirks;
module_param_named(quirks, param_quirks, int, 0644);
MODULE_PARM_DESC(quirks, "Chip quirks (default = 0"
", nonatomic cycle timer = " __stringify(QUIRK_CYCLE_TIMER)
", reset packet generation = " __stringify(QUIRK_RESET_PACKET)
", AR/selfID endianess = " __stringify(QUIRK_BE_HEADERS)
")");
#ifdef CONFIG_FIREWIRE_OHCI_DEBUG
#define OHCI_PARAM_DEBUG_AT_AR 1
@ -2370,6 +2379,8 @@ static int __devinit pci_probe(struct pci_dev *dev,
ohci->quirks = ohci_quirks[i].flags;
break;
}
if (param_quirks)
ohci->quirks = param_quirks;
ar_context_init(&ohci->ar_request_ctx, ohci,
OHCI1394_AsReqRcvContextControlSet);