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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2008-11-26 01:34:25 +0100 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2008-11-29 17:07:56 +0100 |
| commit | e47c1feb17e61ef4e2f245c0af0c5a8e2a7798b2 (patch) | |
| tree | 12e24df6acd00564cb01da470c19c759698da0a9 /drivers/ieee1394/highlevel.c | |
| parent | 031bb27c4bf77c2f60b3f3dea8cce63ef0d1fba9 (diff) | |
| download | talos-obmc-linux-e47c1feb17e61ef4e2f245c0af0c5a8e2a7798b2.tar.gz talos-obmc-linux-e47c1feb17e61ef4e2f245c0af0c5a8e2a7798b2.zip | |
ieee1394: fix list corruption (reported at module removal)
If there is more than one FireWire controller present, dummy_zero_addr
and dummy_max_addr were added multiple times to different lists, thus
corrupting the lists. Fix this by allocating them dynamically per host
instead of just once globally.
(Perhaps a better address space allocation algorithm could rid us of the
two dummy address spaces.)
Fixes http://bugzilla.kernel.org/show_bug.cgi?id=10129 .
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/ieee1394/highlevel.c')
| -rw-r--r-- | drivers/ieee1394/highlevel.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/drivers/ieee1394/highlevel.c b/drivers/ieee1394/highlevel.c index 918ffc4fc8ac..272543a42a43 100644 --- a/drivers/ieee1394/highlevel.c +++ b/drivers/ieee1394/highlevel.c @@ -46,10 +46,6 @@ static DEFINE_RWLOCK(hl_irqs_lock); static DEFINE_RWLOCK(addr_space_lock); -/* addr_space list will have zero and max already included as bounds */ -static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL }; -static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr; - static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host) @@ -481,20 +477,23 @@ int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, return retval; } +static struct hpsb_address_ops dummy_ops; + +/* dummy address spaces as lower and upper bounds of the host's a.s. list */ static void init_hpsb_highlevel(struct hpsb_host *host) { - INIT_LIST_HEAD(&dummy_zero_addr.host_list); - INIT_LIST_HEAD(&dummy_zero_addr.hl_list); - INIT_LIST_HEAD(&dummy_max_addr.host_list); - INIT_LIST_HEAD(&dummy_max_addr.hl_list); + INIT_LIST_HEAD(&host->dummy_zero_addr.host_list); + INIT_LIST_HEAD(&host->dummy_zero_addr.hl_list); + INIT_LIST_HEAD(&host->dummy_max_addr.host_list); + INIT_LIST_HEAD(&host->dummy_max_addr.hl_list); - dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops; + host->dummy_zero_addr.op = host->dummy_max_addr.op = &dummy_ops; - dummy_zero_addr.start = dummy_zero_addr.end = 0; - dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48; + host->dummy_zero_addr.start = host->dummy_zero_addr.end = 0; + host->dummy_max_addr.start = host->dummy_max_addr.end = ((u64) 1) << 48; - list_add_tail(&dummy_zero_addr.host_list, &host->addr_space); - list_add_tail(&dummy_max_addr.host_list, &host->addr_space); + list_add_tail(&host->dummy_zero_addr.host_list, &host->addr_space); + list_add_tail(&host->dummy_max_addr.host_list, &host->addr_space); } void highlevel_add_host(struct hpsb_host *host) |
