blob: 2e9a8483a5f2b9dfd44795ed44f482f5f38d52a4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
From b19ef92e9e95765bab9b952aa781363fe2917254 Mon Sep 17 00:00:00 2001
From: Deepak R Varma <mh12gx2825@gmail.com>
Date: Fri, 6 Nov 2020 01:51:35 +0530
Subject: [PATCH] drm/vc4: replace idr_init() by idr_init_base()
idr_init() uses base 0 which is an invalid identifier for this driver.
The idr_alloc for this driver uses VC4_PERFMONID_MIN as start value for
ID range and it is #defined to 1. The new function idr_init_base allows
IDR to set the ID lookup from base 1. This avoids all lookups that
otherwise starts from 0 since 0 is always unused / available.
References: commit 6ce711f27500 ("idr: Make 1-based IDRs more efficient")
Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201105202135.GA145111@localhost
---
drivers/gpu/drm/vc4/vc4_perfmon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/vc4/vc4_perfmon.c
+++ b/drivers/gpu/drm/vc4/vc4_perfmon.c
@@ -77,7 +77,7 @@ struct vc4_perfmon *vc4_perfmon_find(str
void vc4_perfmon_open_file(struct vc4_file *vc4file)
{
mutex_init(&vc4file->perfmon.lock);
- idr_init(&vc4file->perfmon.idr);
+ idr_init_base(&vc4file->perfmon.idr, VC4_PERFMONID_MIN);
}
static int vc4_perfmon_idr_del(int id, void *elem, void *data)
|