Hello,
You'll find below a patch that implements the FE_SET_PROPERTY ioctl
compat code. This code is reached when a 32 bit application does the
ioctl on a 64 bit kernel.
There are other dvb ioctl that are missing from the compat layer
(FE_GET_PROPERTY and FE_SET_FRONTEND_TUNE_MODE), if this patch is ok,
i'm going to write them as well.
Laurent
commit 6647fda45d70d1947f2dff06c485aa64d78357d7
Author: Laurent Defert <laurent.defert@xxxxxxxxxxxx>
Date: Wed Oct 26 14:32:29 2011 +0200
[media] compat_ioctl: add compat handler for FE_SET_PROPERTY
fixes following error seen on x86_64 kernel:
ioctl32(dvblast:6973): Unknown cmd fd(3) cmd(40086f52){t:'o';sz:8}
arg(0805a318) on /dev/dvb/adapter0/frontend0
The argument (struct dtv_properties) contains a pointer to an array of
struct dtv_property.
Both struct are converted to have proper pointer size.
Signed-off-by: Laurent Defert <laurent.defert@xxxxxxxxxxxx>
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 51352de..6b89ff0 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -222,6 +222,84 @@ static int do_video_set_spu_palette(unsigned int
fd, unsigned int cmd,
return err;
}
+struct compat_dtv_property {
+ __u32 cmd;
+ __u32 reserved[3];
+ union {
+ __u32 data;
+ struct {
+ __u8 data[32];
+ __u32 len;
+ __u32 reserved1[3];
+ compat_uptr_t reserved2;
+ } buffer;
+ } u;
+ int result;
+};
+
+struct compat_dtv_properties {
+ __u32 num;
+ compat_uptr_t props;
+};
+
+#define FE_SET_PROPERTY32 _IOW('o', 82, struct compat_dtv_properties)
+
+static int do_fe_set_property(unsigned int fd, unsigned int cmd,
+ struct compat_dtv_properties __user *dtv32)
+{
+ struct dtv_properties __user *dtv;
+ struct dtv_property __user *properties;
+ struct compat_dtv_property __user *properties32;
+ compat_uptr_t data;
+
+ int err;
+ int i;
+ __u32 num;
+
+ err = get_user(num, &dtv32->num);
+ err |= get_user(data, &dtv32->props);
+
+ if(err)
+ return -EFAULT;
+
+ dtv = compat_alloc_user_space(sizeof(struct dtv_properties) +
+ sizeof(struct dtv_property) * num);
+ properties = (struct dtv_property*)((char*)dtv +
+ sizeof(struct dtv_properties));
+
+ err = put_user(properties, &dtv->props);
+ err |= put_user(num, &dtv->num);
+
+ properties32 = compat_ptr(data);
+
+ if(err)
+ return -EFAULT;
+
+ for(i = 0; i < num; i++) {
+ compat_uptr_t reserved2;
+
+ err |= copy_in_user(&properties[i], &properties32[i],
+ (8 * sizeof(__u32)) + (32 * sizeof(__u8)));
+ err |= get_user(reserved2, &properties32[i].u.buffer.reserved2);
+ err |= put_user(compat_ptr(reserved2),
+ &properties[i].u.buffer.reserved2);
+ }
+
+ if(err)
+ return -EFAULT;
+
+ err = sys_ioctl(fd, FE_SET_PROPERTY, (unsigned long) dtv);
+
+ for(i = 0; i < num; i++) {
+ if(copy_in_user(&properties[i].result, &properties32[i].result,
+ sizeof(int)))
+ return -EFAULT;
+ }
+
+ return err;
+}
+
+
#ifdef CONFIG_BLOCK
typedef struct sg_io_hdr32 {
compat_int_t interface_id; /* [i] 'S' for SCSI generic
(required) */
@@ -1470,6 +1548,8 @@ static long do_ioctl_trans(int fd, unsigned int cmd,
return do_video_stillpicture(fd, cmd, argp);
case VIDEO_SET_SPU_PALETTE:
return do_video_set_spu_palette(fd, cmd, argp);
+ case FE_SET_PROPERTY32:
+ return do_fe_set_property(fd, cmd, argp);
}
/*
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