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firewire: core: fix crash in iso resource management 

This fixes a regression due to post 2.6.30 commit "firewire: core: do
not DMA-map stack addresses" 6fdc037094.

As David Moore noted, a previously correct sizeof() expression became
wrong since the commit changed its argument from an array to a pointer.
This resulted in an oops in ohci_cancel_packet in the shared workqueue
thread's context when an isochronous resource was to be freed.

Reported-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2009-09-05 13:23:49 +02:00
parent ebbb16bffa
commit 1821bc19d5
1 changed files with 2 additions and 2 deletions
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4
drivers/firewire/core-iso.c
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@ -196,7 +196,7 @@ static int manage_bandwidth(struct fw_card *card, int irm_id, int generation,
switch (fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP,
irm_id, generation, SCODE_100,
CSR_REGISTER_BASE + CSR_BANDWIDTH_AVAILABLE,
data, sizeof(data))) {
data, 8)) {
case RCODE_GENERATION:
/* A generation change frees all bandwidth. */
return allocate ? -EAGAIN : bandwidth;
@ -233,7 +233,7 @@ static int manage_channel(struct fw_card *card, int irm_id, int generation,
data[1] = old ^ c;
switch (fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP,
irm_id, generation, SCODE_100,
offset, data, sizeof(data))) {
offset, data, 8)) {
case RCODE_GENERATION:
/* A generation change frees all channels. */
return allocate ? -EAGAIN : i;