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