Messages in this thread Patch in this message | | | From | Sudip Mukherjee <> | Subject | [PATCH v2 4/5] drivers/misc/sgi-gru: fix dereference of ERR_PTR | Date | Thu, 3 Sep 2015 20:20:50 +0530 |
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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> ---
v2: on error retry after msleep(1). v1: returned error.
drivers/misc/sgi-gru/grukservices.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c index 490b79a..d64f2a0 100644 --- a/drivers/misc/sgi-gru/grukservices.c +++ b/drivers/misc/sgi-gru/grukservices.c @@ -160,7 +160,14 @@ 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)) { + msleep(1); + continue; + } + break; + } while (true); bs->bs_kgts->ts_user_blade_id = blade_id; } kgts = bs->bs_kgts; -- 1.9.1
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