diff options
| -rw-r--r-- | drivers/firewire/ohci.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index b5ba66656c6..84eb607d6c0 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -740,11 +740,13 @@ static void ar_context_tasklet(unsigned long data) struct ar_buffer *ab; struct descriptor *d; void *buffer, *end; + __le16 res_count; ab = ctx->current_buffer; d = &ab->descriptor; - if (d->res_count == 0) { + res_count = ACCESS_ONCE(d->res_count); + if (res_count == 0) { size_t size, size2, rest, pktsize, size3, offset; dma_addr_t start_bus; void *start; @@ -812,7 +814,7 @@ static void ar_context_tasklet(unsigned long data) } else { buffer = ctx->pointer; ctx->pointer = end = - (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count); + (void *) ab + PAGE_SIZE - le16_to_cpu(res_count); while (buffer < end) buffer = handle_ar_packet(ctx, buffer); |