diff options
| author | Dan Carpenter <error27@gmail.com> | 2010-06-03 12:07:46 +0200 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-06-09 15:57:36 -0700 |
| commit | d6d4d4205cf4ce4ba13bc320305afbda25303496 (patch) | |
| tree | 6e1a3832c00bebddff757d54efa43c9aacddab50 /arch/x86/kernel/xsave.c | |
| parent | e44a21b7268a022c7749f521c06214145bd161e4 (diff) | |
x86, xsave: Cleanup return codes in check_for_xstate()
The places which call check_for_xstate() only care about zero or
non-zero so this patch doesn't change how the code runs, but it's a
cleanup. The main reason for this patch is that I'm looking for places
which don't return -EFAULT for copy_from_user() failures.
Signed-off-by: Dan Carpenter <error27@gmail.com>
LKML-Reference: <20100603100746.GU5483@bicker>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Diffstat (limited to 'arch/x86/kernel/xsave.c')
| -rw-r--r-- | arch/x86/kernel/xsave.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index 37e68fc5e24..980149867a1 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -36,15 +36,14 @@ int check_for_xstate(struct i387_fxsave_struct __user *buf, err = __copy_from_user(fx_sw_user, &buf->sw_reserved[0], sizeof(struct _fpx_sw_bytes)); - if (err) - return err; + return -EFAULT; /* * First Magic check failed. */ if (fx_sw_user->magic1 != FP_XSTATE_MAGIC1) - return -1; + return -EINVAL; /* * Check for error scenarios. @@ -52,19 +51,21 @@ int check_for_xstate(struct i387_fxsave_struct __user *buf, if (fx_sw_user->xstate_size < min_xstate_size || fx_sw_user->xstate_size > xstate_size || fx_sw_user->xstate_size > fx_sw_user->extended_size) - return -1; + return -EINVAL; err = __get_user(magic2, (__u32 *) (((void *)fpstate) + fx_sw_user->extended_size - FP_XSTATE_MAGIC2_SIZE)); + if (err) + return err; /* * Check for the presence of second magic word at the end of memory * layout. This detects the case where the user just copied the legacy * fpstate layout with out copying the extended state information * in the memory layout. */ - if (err || magic2 != FP_XSTATE_MAGIC2) - return -1; + if (magic2 != FP_XSTATE_MAGIC2) + return -EFAULT; return 0; } |