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authorJack Steiner <steiner@sgi.com>2009-06-18 01:28:23 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 22:04:00 +0200
commit3eac2e95d7bb92222e185e445eca1fe3f695050f (patch)
tree51edba7b926d3587dfa40646bf7b453f47d26dff /drivers/misc/sgi-gru/grufile.c
parentgru: change resource assignment for kernel threads (diff)
downloadlinux-3eac2e95d7bb92222e185e445eca1fe3f695050f.tar.xz
linux-3eac2e95d7bb92222e185e445eca1fe3f695050f.zip
gru: support contexts with zero dsrs or cbrs
Support alocation of GRU contexts that contain zero DSR or CBR resources. Some instructions do not require DSR resources. Contexts without CBR resources are useful for diagnostics. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grufile.c')
-rw-r--r--drivers/misc/sgi-gru/grufile.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
index 9e6da46eeb04..b1567ce868e9 100644
--- a/drivers/misc/sgi-gru/grufile.c
+++ b/drivers/misc/sgi-gru/grufile.c
@@ -135,11 +135,9 @@ static int gru_create_new_context(unsigned long arg)
if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
return -EFAULT;
- if (req.data_segment_bytes == 0 ||
- req.data_segment_bytes > max_user_dsr_bytes)
+ if (req.data_segment_bytes > max_user_dsr_bytes)
return -EINVAL;
- if (!req.control_blocks || !req.maximum_thread_count ||
- req.control_blocks > max_user_cbrs)
+ if (req.control_blocks > max_user_cbrs || !req.maximum_thread_count)
return -EINVAL;
if (!(req.options & GRU_OPT_MISS_MASK))