diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/firewire/amdtp-stream.c | 49 | ||||
| -rw-r--r-- | sound/firewire/amdtp-stream.h | 5 |
2 files changed, 25 insertions, 29 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index 020edf2b1726..4584525a7f30 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -474,14 +474,14 @@ static inline int queue_in_packet(struct amdtp_stream *s) return queue_packet(s, s->ctx_data.tx.max_payload_length); } -static int handle_out_packet(struct amdtp_stream *s, - unsigned int payload_length, unsigned int cycle, - unsigned int index) +static int handle_out_packet(struct amdtp_stream *s, unsigned int cycle, + const __be32 *ctx_header, unsigned int index) { __be32 *buffer; unsigned int syt; unsigned int data_blocks; unsigned int pcm_frames; + unsigned int payload_length; struct snd_pcm_substream *pcm; buffer = s->buffer.packets[s->packet_index].buffer; @@ -521,13 +521,14 @@ static int handle_out_packet(struct amdtp_stream *s, } static int handle_out_packet_without_header(struct amdtp_stream *s, - unsigned int payload_length, unsigned int cycle, - unsigned int index) + unsigned int cycle, const __be32 *ctx_header, + unsigned int index) { __be32 *buffer; unsigned int syt; unsigned int data_blocks; unsigned int pcm_frames; + unsigned int payload_length; struct snd_pcm_substream *pcm; buffer = s->buffer.packets[s->packet_index].buffer; @@ -551,11 +552,11 @@ static int handle_out_packet_without_header(struct amdtp_stream *s, return 0; } -static int handle_in_packet(struct amdtp_stream *s, - unsigned int payload_length, unsigned int cycle, - unsigned int index) +static int handle_in_packet(struct amdtp_stream *s, unsigned int cycle, + const __be32 *ctx_header, unsigned int index) { __be32 *buffer; + unsigned int payload_length; u32 cip_header[2]; unsigned int sph, fmt, fdf, syt; unsigned int data_block_quadlets, data_block_counter, dbc_interval; @@ -564,6 +565,14 @@ static int handle_in_packet(struct amdtp_stream *s, unsigned int pcm_frames; bool lost; + payload_length = be32_to_cpu(ctx_header[0]) >> ISO_DATA_LENGTH_SHIFT; + if (payload_length > s->ctx_data.tx.max_payload_length) { + dev_err(&s->unit->device, + "Detect jumbo payload: %04x %04x\n", + payload_length, s->ctx_data.tx.max_payload_length); + return -EIO; + } + buffer = s->buffer.packets[s->packet_index].buffer; cip_header[0] = be32_to_cpu(buffer[0]); cip_header[1] = be32_to_cpu(buffer[1]); @@ -668,14 +677,16 @@ end: } static int handle_in_packet_without_header(struct amdtp_stream *s, - unsigned int payload_length, unsigned int cycle, - unsigned int index) + unsigned int cycle, const __be32 *ctx_header, + unsigned int index) { __be32 *buffer; + unsigned int payload_length; unsigned int data_blocks; struct snd_pcm_substream *pcm; unsigned int pcm_frames; + payload_length = be32_to_cpu(ctx_header[0]) >> ISO_DATA_LENGTH_SHIFT; buffer = s->buffer.packets[s->packet_index].buffer; data_blocks = payload_length / sizeof(__be32) / s->data_block_quadlets; @@ -745,7 +756,7 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp, cycle = compute_it_cycle(*ctx_header); - if (s->handle_packet(s, 0, cycle, i) < 0) { + if (s->handle_packet(s, cycle, ctx_header, i) < 0) { cancel_stream(s); return; } @@ -762,7 +773,6 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp, { struct amdtp_stream *s = private_data; unsigned int i, packets; - unsigned int payload_length, max_payload_length; __be32 *ctx_header = header; if (s->packet_index < 0) @@ -771,25 +781,12 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp, // The number of packets in buffer. packets = header_length / s->ctx_data.tx.ctx_header_size; - /* For buffer-over-run prevention. */ - max_payload_length = s->ctx_data.tx.max_payload_length; - for (i = 0; i < packets; i++) { - u32 iso_header = be32_to_cpu(ctx_header[0]); u32 cycle; cycle = compute_cycle_count(ctx_header[1]); - /* The number of bytes in this packet */ - payload_length = iso_header >> ISO_DATA_LENGTH_SHIFT; - if (payload_length > max_payload_length) { - dev_err(&s->unit->device, - "Detect jumbo payload: %04x %04x\n", - payload_length, max_payload_length); - break; - } - - if (s->handle_packet(s, payload_length, cycle, i) < 0) + if (s->handle_packet(s, cycle, ctx_header, i) < 0) break; ctx_header += s->ctx_data.tx.ctx_header_size / sizeof(*ctx_header); diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index 1945ef59ab92..d317fdc6ab5f 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -108,9 +108,8 @@ struct amdtp_stream { struct iso_packets_buffer buffer; int packet_index; int tag; - int (*handle_packet)(struct amdtp_stream *s, - unsigned int payload_quadlets, unsigned int cycle, - unsigned int index); + int (*handle_packet)(struct amdtp_stream *s, unsigned int cycle, + const __be32 *ctx_header, unsigned int index); union { struct { unsigned int ctx_header_size; |