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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 6ce711f275
("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
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1 changed files with 1 additions and 1 deletions
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@ -77,7 +77,7 @@ struct vc4_perfmon *vc4_perfmon_find(struct vc4_file *vc4file, int id)
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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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