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| author | Kristian Høgsberg <krh@redhat.com> | 2007-05-31 11:16:43 -0400 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-05-31 21:40:15 +0200 |
| commit | 1ca31ae7cfed3e2a8e48fbf6ed6cac06495b6158 (patch) | |
| tree | 931d04e229f78091308d544f50717e547fb26318 /drivers/firewire/fw-cdev.c | |
| parent | 2aef469a35a273609beaa7094d5a07c1f6d75285 (diff) | |
| download | linux-1ca31ae7cfed3e2a8e48fbf6ed6cac06495b6158.tar.bz2 | |
firewire: Change struct fw_cdev_iso_packet to not use bitfields.
The struct is part of the userspace interface and can not use
bitfields. This patch replaces the bitfields with a __u32 'control'
word and provides access macros to set the bits.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/fw-cdev.c')
| -rw-r--r-- | drivers/firewire/fw-cdev.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c index 3ab3585d3601..5d402d63799f 100644 --- a/drivers/firewire/fw-cdev.c +++ b/drivers/firewire/fw-cdev.c @@ -677,12 +677,21 @@ static int ioctl_create_iso_context(struct client *client, void *buffer) return 0; } +/* Macros for decoding the iso packet control header. */ +#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) +#define GET_INTERRUPT(v) (((v) >> 16) & 0x01) +#define GET_SKIP(v) (((v) >> 17) & 0x01) +#define GET_TAG(v) (((v) >> 18) & 0x02) +#define GET_SY(v) (((v) >> 20) & 0x04) +#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) + static int ioctl_queue_iso(struct client *client, void *buffer) { struct fw_cdev_queue_iso *request = buffer; struct fw_cdev_iso_packet __user *p, *end, *next; struct fw_iso_context *ctx = client->iso_context; unsigned long payload, buffer_end, header_length; + u32 control; int count; struct { struct fw_iso_packet packet; @@ -717,8 +726,14 @@ static int ioctl_queue_iso(struct client *client, void *buffer) end = (void __user *)p + request->size; count = 0; while (p < end) { - if (__copy_from_user(&u.packet, p, sizeof(*p))) + if (get_user(control, &p->control)) return -EFAULT; + u.packet.payload_length = GET_PAYLOAD_LENGTH(control); + u.packet.interrupt = GET_INTERRUPT(control); + u.packet.skip = GET_SKIP(control); + u.packet.tag = GET_TAG(control); + u.packet.sy = GET_SY(control); + u.packet.header_length = GET_HEADER_LENGTH(control); if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { header_length = u.packet.header_length; |