lkml.org 
[lkml]   [2015]   [Sep]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3] drivers/misc/sgi-gru: fix dereference of ERR_PTR
Date
gru_alloc_gts() can fail and it can return ERR_PTR(errvalue). We should
not dereference it if it has returned error. And incase it has returned
error then wait for some time and try again.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
---

v3: compact code for if logic
v2: on error retry after msleep(1).
v1: returned error.


drivers/misc/sgi-gru/grukservices.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c
index 490b79a..7812e34 100644
--- a/drivers/misc/sgi-gru/grukservices.c
+++ b/drivers/misc/sgi-gru/grukservices.c
@@ -160,7 +160,12 @@ static void gru_load_kernel_context(struct gru_blade_state *bs, int blade_id)
down_write(&bs->bs_kgts_sema);

if (!bs->bs_kgts) {
- bs->bs_kgts = gru_alloc_gts(NULL, 0, 0, 0, 0, 0);
+ do {
+ bs->bs_kgts = gru_alloc_gts(NULL, 0, 0, 0, 0, 0);
+ if (!IS_ERR(bs->bs_kgts))
+ break;
+ msleep(1);
+ } while (true);
bs->bs_kgts->ts_user_blade_id = blade_id;
}
kgts = bs->bs_kgts;
--
1.9.1


\
 
 \ /
  Last update: 2015-09-04 06:41    [W:0.076 / U:48.572 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site