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| author | Andrew Turner <andrew@FreeBSD.org> | 2023-06-27 08:32:12 +0000 |
|---|---|---|
| committer | Andrew Turner <andrew@FreeBSD.org> | 2023-09-25 08:41:32 +0000 |
| commit | ffe9a1987bb7d57b21bb19e20fd9f66dd98e7a78 (patch) | |
| tree | 1d63354742d9bcfb5a2ce27017229433614e7966 | |
| parent | 0fb5ae0c7c3d8adf4d1e0d8badf7e724db279f8a (diff) | |
| download | src-ffe9a1987bb7d57b21bb19e20fd9f66dd98e7a78.tar.gz src-ffe9a1987bb7d57b21bb19e20fd9f66dd98e7a78.zip | |
Continue searching for an irq map from the start
When searching for a free irq map location continue the search from the
beginning of the list. There may be holes in the map before
irq_map_first_free_idx, e.g. when removing an entries in order will
increase the index past the current free entry.
PR: 271990
Reviewed by: mhorne
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D40768
(cherry picked from commit 9beb195fd9fdc4beb7d5bca865cf5b19ccd7449b)
| -rw-r--r-- | sys/kern/subr_intr.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sys/kern/subr_intr.c b/sys/kern/subr_intr.c index 02da0b884535..cb7a8647e433 100644 --- a/sys/kern/subr_intr.c +++ b/sys/kern/subr_intr.c @@ -1715,6 +1715,14 @@ intr_map_irq(device_t dev, intptr_t xref, struct intr_map_data *data) return (i); } } + for (i = 0; i < irq_map_first_free_idx; i++) { + if (irq_map[i] == NULL) { + irq_map[i] = entry; + irq_map_first_free_idx = i + 1; + mtx_unlock(&irq_map_lock); + return (i); + } + } mtx_unlock(&irq_map_lock); /* XXX Expand irq_map table */ |