In an effort to enable -Wcast-function-type in the top-level Makefile to support Control Flow Integrity builds, remove all the function callback casts.
To do this, modify the "fw_iso_context_create" function prototype adding a new parameter for the multichannel callback. Also, fix all the function calls accordingly.
In the "fw_iso_context_create" function return an error code if both callback parameters are NULL and also set the "ctx->callback.sc" explicity to NULL in this case. It is not necessary set to NULL the "ctx->callback.mc" variable because this and "ctx->callback.sc" are an union and setting one implies setting the other one to the same value.
Signed-off-by: Oscar Carter oscar.carter@gmx.com --- Changelog v1->v2 -Set explicity to NULL the "ctx->callback.sc" variable and return an error code in "fw_iso_context_create" function if both callback parameters are NULL as Lev R. Oshvang suggested. -Modify the commit changelog accordingly.
drivers/firewire/core-cdev.c | 12 +++++++----- drivers/firewire/core-iso.c | 14 ++++++++++++-- drivers/firewire/net.c | 2 +- drivers/media/firewire/firedtv-fw.c | 3 ++- include/linux/firewire.h | 3 ++- sound/firewire/amdtp-stream.c | 2 +- sound/firewire/isight.c | 4 ++-- 7 files changed, 27 insertions(+), 13 deletions(-)
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c index 6e291d8f3a27..cc368b35be2e 100644 --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -957,7 +957,8 @@ static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) { struct fw_cdev_create_iso_context *a = &arg->create_iso_context; struct fw_iso_context *context; - fw_iso_callback_t cb; + fw_iso_callback_t cb_sc = NULL; + fw_iso_mc_callback_t cb_mc = NULL; int ret;
BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || @@ -970,7 +971,7 @@ static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) if (a->speed > SCODE_3200 || a->channel > 63) return -EINVAL;
- cb = iso_callback; + cb_sc = iso_callback; break;
case FW_ISO_CONTEXT_RECEIVE: @@ -978,11 +979,11 @@ static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) a->channel > 63) return -EINVAL;
- cb = iso_callback; + cb_sc = iso_callback; break;
case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: - cb = (fw_iso_callback_t)iso_mc_callback; + cb_mc = iso_mc_callback; break;
default: @@ -990,7 +991,8 @@ static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) }
context = fw_iso_context_create(client->device->card, a->type, - a->channel, a->speed, a->header_size, cb, client); + a->channel, a->speed, a->header_size, cb_sc, cb_mc, + client); if (IS_ERR(context)) return PTR_ERR(context); if (client->version < FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW) diff --git a/drivers/firewire/core-iso.c b/drivers/firewire/core-iso.c index 185b0b78b3d6..1d28a98c08b2 100644 --- a/drivers/firewire/core-iso.c +++ b/drivers/firewire/core-iso.c @@ -131,7 +131,8 @@ size_t fw_iso_buffer_lookup(struct fw_iso_buffer *buffer, dma_addr_t completed)
struct fw_iso_context *fw_iso_context_create(struct fw_card *card, int type, int channel, int speed, size_t header_size, - fw_iso_callback_t callback, void *callback_data) + fw_iso_callback_t cb_sc, fw_iso_mc_callback_t cb_mc, + void *callback_data) { struct fw_iso_context *ctx;
@@ -145,7 +146,16 @@ struct fw_iso_context *fw_iso_context_create(struct fw_card *card, ctx->channel = channel; ctx->speed = speed; ctx->header_size = header_size; - ctx->callback.sc = callback; + + if (cb_sc) { + ctx->callback.sc = cb_sc; + } else if (cb_mc) { + ctx->callback.mc = cb_mc; + } else { + ctx->callback.sc = NULL; + return ERR_PTR(-EINVAL); + } + ctx->callback_data = callback_data;
return ctx; diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c index 715e491dfbc3..c5cc0a311aa0 100644 --- a/drivers/firewire/net.c +++ b/drivers/firewire/net.c @@ -1136,7 +1136,7 @@ static int fwnet_broadcast_start(struct fwnet_device *dev) context = fw_iso_context_create(dev->card, FW_ISO_CONTEXT_RECEIVE, IEEE1394_BROADCAST_CHANNEL, dev->card->link_speed, 8, - fwnet_receive_broadcast, dev); + fwnet_receive_broadcast, NULL, dev); if (IS_ERR(context)) { retval = PTR_ERR(context); goto failed; diff --git a/drivers/media/firewire/firedtv-fw.c b/drivers/media/firewire/firedtv-fw.c index 97144734eb05..d2940adefd8c 100644 --- a/drivers/media/firewire/firedtv-fw.c +++ b/drivers/media/firewire/firedtv-fw.c @@ -141,7 +141,8 @@ int fdtv_start_iso(struct firedtv *fdtv)
ctx->context = fw_iso_context_create(device->card, FW_ISO_CONTEXT_RECEIVE, fdtv->isochannel, - device->max_speed, ISO_HEADER_SIZE, handle_iso, fdtv); + device->max_speed, ISO_HEADER_SIZE, + handle_iso, NULL, fdtv); if (IS_ERR(ctx->context)) { err = PTR_ERR(ctx->context); goto fail_free; diff --git a/include/linux/firewire.h b/include/linux/firewire.h index aec8f30ab200..3a0b5e18e140 100644 --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -452,7 +452,8 @@ struct fw_iso_context {
struct fw_iso_context *fw_iso_context_create(struct fw_card *card, int type, int channel, int speed, size_t header_size, - fw_iso_callback_t callback, void *callback_data); + fw_iso_callback_t cb_sc, fw_iso_mc_callback_t cb_mc, + void *callback_data); int fw_iso_context_set_channels(struct fw_iso_context *ctx, u64 *channels); int fw_iso_context_queue(struct fw_iso_context *ctx, struct fw_iso_packet *packet, diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index 37d38efb4c87..8629ab3e2c64 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -1093,7 +1093,7 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
s->context = fw_iso_context_create(fw_parent_device(s->unit)->card, type, channel, speed, ctx_header_size, - ctx_cb, ctx_data); + ctx_cb, NULL, ctx_data); if (IS_ERR(s->context)) { err = PTR_ERR(s->context); if (err == -EBUSY) diff --git a/sound/firewire/isight.c b/sound/firewire/isight.c index 6655af53b367..51cc37fca736 100644 --- a/sound/firewire/isight.c +++ b/sound/firewire/isight.c @@ -361,8 +361,8 @@ static int isight_start_streaming(struct isight *isight) isight->context = fw_iso_context_create(isight->device->card, FW_ISO_CONTEXT_RECEIVE, isight->resources.channel, - isight->device->max_speed, - 4, isight_packet, isight); + isight->device->max_speed, 4, + isight_packet, NULL, isight); if (IS_ERR(isight->context)) { err = PTR_ERR(isight->context); isight->context = NULL; -- 2.20.1