| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sun, 21 Feb 2010 17:58:01 +0100 (CET)
From: Stefan Richter <stefanr@...6.in-berlin.de>
To: linux1394-devel@...ts.sourceforge.net
cc: linux-kernel@...r.kernel.org
Subject: [PATCH 5/8] firewire: ohci: use an ID table for quirks detection
We don't have a lot of quirks to take into account (especially since
dual-buffer IR is out of the picture), but still, a table-based approach
is more organized than a series of if () clauses.
Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---
drivers/firewire/ohci.c | 46 ++++++++++++++++++++++++----------------
1 file changed, 28 insertions(+), 18 deletions(-)
Index: b/drivers/firewire/ohci.c
===================================================================
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -169,10 +169,7 @@ struct fw_ohci {
int node_id;
int generation;
int request_generation; /* for timestamping incoming requests */
-
- bool old_uninorth;
- bool bus_reset_packet_quirk;
- bool iso_cycle_timer_quirk;
+ unsigned quirks;
/*
* Spinlock for accessing fw_ohci data. Never call out of
@@ -234,6 +231,21 @@ static inline struct fw_ohci *fw_ohci(st
static char ohci_driver_name[] = KBUILD_MODNAME;
+#define QUIRK_CYCLE_TIMER 1
+#define QUIRK_RESET_PACKET 2
+#define QUIRK_BE_HEADERS 4
+
+/* In case of multiple matches in ohci_quirks[], only the first one is used. */
+static const struct {
+ unsigned short vendor, device, flags;
+} ohci_quirks[] = {
+ {PCI_VENDOR_ID_TI, PCI_ANY_ID, QUIRK_RESET_PACKET},
+ {PCI_VENDOR_ID_AL, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
+ {PCI_VENDOR_ID_NEC, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
+ {PCI_VENDOR_ID_VIA, PCI_ANY_ID, QUIRK_CYCLE_TIMER},
+ {PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_FW, QUIRK_BE_HEADERS},
+};
+
#ifdef CONFIG_FIREWIRE_OHCI_DEBUG
#define OHCI_PARAM_DEBUG_AT_AR 1
@@ -507,7 +519,7 @@ static void ar_context_release(struct ar
#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
#define cond_le32_to_cpu(v) \
- (ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v))
+ (ohci->quirks & QUIRK_BE_HEADERS ? (__force __u32)(v) : le32_to_cpu(v))
#else
#define cond_le32_to_cpu(v) le32_to_cpu(v)
#endif
@@ -588,7 +600,7 @@ static __le32 *handle_ar_packet(struct a
* at a slightly incorrect time (in bus_reset_tasklet).
*/
if (evt == OHCI1394_evt_bus_reset) {
- if (!ohci->bus_reset_packet_quirk)
+ if (!(ohci->quirks & QUIRK_RESET_PACKET))
ohci->request_generation = (p.header[2] >> 16) & 0xff;
} else if (ctx == &ohci->ar_request_ctx) {
fw_core_handle_request(&ohci->card, &p);
@@ -1312,7 +1324,7 @@ static void bus_reset_tasklet(unsigned l
context_stop(&ohci->at_response_ctx);
reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
- if (ohci->bus_reset_packet_quirk)
+ if (ohci->quirks & QUIRK_RESET_PACKET)
ohci->request_generation = generation;
/*
@@ -1806,7 +1818,7 @@ static u32 ohci_get_cycle_time(struct fw
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
- if (ohci->iso_cycle_timer_quirk) {
+ if (ohci->quirks & QUIRK_CYCLE_TIMER) {
i = 0;
c1 = c2;
c2 = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
@@ -2308,7 +2320,7 @@ static int __devinit pci_probe(struct pc
struct fw_ohci *ohci;
u32 bus_options, max_receive, link_speed, version;
u64 guid;
- int err;
+ int i, err;
size_t size;
ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
@@ -2351,15 +2363,13 @@ static int __devinit pci_probe(struct pc
version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
-#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
- ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
- dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
-#endif
- ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
-
- ohci->iso_cycle_timer_quirk = dev->vendor == PCI_VENDOR_ID_AL ||
- dev->vendor == PCI_VENDOR_ID_NEC ||
- dev->vendor == PCI_VENDOR_ID_VIA;
+ for (i = 0; i < ARRAY_SIZE(ohci_quirks); i++)
+ if (ohci_quirks[i].vendor == dev->vendor &&
+ (ohci_quirks[i].device == dev->device ||
+ ohci_quirks[i].device == (unsigned short)PCI_ANY_ID)) {
+ ohci->quirks = ohci_quirks[i].flags;
+ break;
+ }
ar_context_init(&ohci->ar_request_ctx, ohci,
OHCI1394_AsReqRcvContextControlSet);
--
Stefan Richter
-=====-==-=- --=- =-=-=
http://arcgraph.de/sr/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists