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authorSudip Mukherjee <sudipm.mukherjee@gmail.com>2015-09-03 17:50:47 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-09-21 05:27:58 +0300
commita010d2761705d38e8720d7ab56ba1f7a9e1246d9 (patch)
tree09df43f5edeeba46228700857650b00ddd77f9ad /drivers/misc/sgi-gru
parentbf84b1406c206374133e85e15bab266e10e1a837 (diff)
downloadlinux-a010d2761705d38e8720d7ab56ba1f7a9e1246d9.tar.xz
drivers/misc/sgi-gru: add return on error
If the buffer is too small then return the error and in the process remove the variables which became unused. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Acked-by: Dimitri Sivanich <sivanich@sgi.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru')
-rw-r--r--drivers/misc/sgi-gru/grukdump.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/misc/sgi-gru/grukdump.c b/drivers/misc/sgi-gru/grukdump.c
index a3700a56b8ff..7e9aae56b72e 100644
--- a/drivers/misc/sgi-gru/grukdump.c
+++ b/drivers/misc/sgi-gru/grukdump.c
@@ -78,11 +78,10 @@ static int gru_dump_tfm(struct gru_state *gru,
void __user *ubuf, void __user *ubufend)
{
struct gru_tlb_fault_map *tfm;
- int i, ret, bytes;
+ int i;
- bytes = GRU_NUM_TFM * GRU_CACHE_LINE_BYTES;
- if (bytes > ubufend - ubuf)
- ret = -EFBIG;
+ if (GRU_NUM_TFM * GRU_CACHE_LINE_BYTES > ubufend - ubuf)
+ return -EFBIG;
for (i = 0; i < GRU_NUM_TFM; i++) {
tfm = get_tfm(gru->gs_gru_base_vaddr, i);
@@ -99,11 +98,10 @@ static int gru_dump_tgh(struct gru_state *gru,
void __user *ubuf, void __user *ubufend)
{
struct gru_tlb_global_handle *tgh;
- int i, ret, bytes;
+ int i;
- bytes = GRU_NUM_TGH * GRU_CACHE_LINE_BYTES;
- if (bytes > ubufend - ubuf)
- ret = -EFBIG;
+ if (GRU_NUM_TGH * GRU_CACHE_LINE_BYTES > ubufend - ubuf)
+ return -EFBIG;
for (i = 0; i < GRU_NUM_TGH; i++) {
tgh = get_tgh(gru->gs_gru_base_vaddr, i);