Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1ca31ae7cfed3e2a8e48fbf6ed6cac06495b6158
Commit: 1ca31ae7cfed3e2a8e48fbf6ed6cac06495b6158
Parent: 2aef469a35a273609beaa7094d5a07c1f6d75285
Author: Kristian Høgsberg <[EMAIL PROTECTED]>
AuthorDate: Thu May 31 11:16:43 2007 -0400
Committer: Stefan Richter <[EMAIL PROTECTED]>
CommitDate: Thu May 31 21:40:15 2007 +0200
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 <[EMAIL PROTECTED]>
Signed-off-by: Stefan Richter <[EMAIL PROTECTED]>
---
drivers/firewire/fw-cdev.c | 17 ++++++++++++++++-
include/linux/firewire-cdev.h | 14 ++++++++------
2 files changed, 24 insertions(+), 7 deletions(-)
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index 3ab3585..5d402d6 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;
diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h
index d4455eb..efbe1fd 100644
--- a/include/linux/firewire-cdev.h
+++ b/include/linux/firewire-cdev.h
@@ -198,13 +198,15 @@ struct fw_cdev_create_iso_context {
__u32 handle;
};
+#define FW_CDEV_ISO_PAYLOAD_LENGTH(v) (v)
+#define FW_CDEV_ISO_INTERRUPT (1 << 16)
+#define FW_CDEV_ISO_SKIP (1 << 17)
+#define FW_CDEV_ISO_TAG(v) ((v) << 18)
+#define FW_CDEV_ISO_SY(v) ((v) << 20)
+#define FW_CDEV_ISO_HEADER_LENGTH(v) ((v) << 24)
+
struct fw_cdev_iso_packet {
- __u16 payload_length; /* Length of indirect payload. */
- __u32 interrupt : 1; /* Generate interrupt on this packet */
- __u32 skip : 1; /* Set to not send packet at all. */
- __u32 tag : 2;
- __u32 sy : 4;
- __u32 header_length : 8; /* Length of immediate header. */
+ __u32 control;
__u32 header[0];
};
-
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