openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

drivers: fix up various ->llseek() implementations 

Fix up a few ->llseek() implementations that won't deal with SEEK_HOLE/SEEK_DATA
properly.  Make them future proof so that if we ever add new options they will
return -EINVAL.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Josef Bacik 2011-07-18 13:21:39 -04:00 committed by Al Viro
parent 06222e491e
commit 22735068d5
4 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/char/generic_nvram.c
View File

@ -34,12 +34,16 @@ static ssize_t nvram_len;
static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
{
switch (origin) {
case 0:
break;
case 1:
offset += file->f_pos;
break;
case 2:
offset += nvram_len;
break;
default:
offset = -1;
}
if (offset < 0)
return -EINVAL;

2
drivers/char/nvram.c
View File

@ -224,6 +224,8 @@ static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
case 2:
offset += NVRAM_BYTES;
break;
default:
return -EINVAL;
}
return (offset >= 0) ? (file->f_pos = offset) : -EINVAL;

4
drivers/char/ps3flash.c
View File

@ -101,12 +101,16 @@ static loff_t ps3flash_llseek(struct file *file, loff_t offset, int origin)
mutex_lock(&file->f_mapping->host->i_mutex);
switch (origin) {
case 0:
break;
case 1:
offset += file->f_pos;
break;
case 2:
offset += dev->regions[dev->region_idx].size*dev->blk_size;
break;
default:
offset = -1;
}
if (offset < 0) {
res = -EINVAL;

4
drivers/macintosh/nvram.c
View File

@ -21,12 +21,16 @@
static loff_t nvram_llseek(struct file *file, loff_t offset, int origin)
{
switch (origin) {
case 0:
break;
case 1:
offset += file->f_pos;
break;
case 2:
offset += NVRAM_SIZE;
break;
default:
offset = -1;
}
if (offset < 0)
return -EINVAL;