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hdac: Defer interrupt allocation in hdac_attach()

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hdac_attach() registers an interrupt handler before allocating various
driver resources which are accessed by the interrupt handler.  On some
platforms we observe what appear to be spurious interrupts upon a cold
boot, resulting in panics.

Partially work around the problem by deferring irq allocation until
after other resources are allocated.  I think this is not a complete
solution, but is correct and sufficient to work around the problems
reported in the PR.

PR:		268393
Tested by:	Alexander Sherikov <asherikov@yandex.com>
Tested by:	Oleh Hushchenkov <o.hushchenkov@gmail.com>
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D41883

(cherry picked from commit 015daf5221)
This commit is contained in:
Mark Johnston 2023-09-27 08:23:58 -04:00
parent 20c494a9d3
commit 1e8737f4e8
1 changed files with 4 additions and 3 deletions
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7
sys/dev/sound/pci/hda/hdac.c
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@ -1270,9 +1270,6 @@ hdac_attach(device_t dev)
/* Allocate resources */
result = hdac_mem_alloc(sc);
if (result != 0)
goto hdac_attach_fail;
result = hdac_irq_alloc(sc);
if (result != 0)
goto hdac_attach_fail;
@ -1347,6 +1344,10 @@ hdac_attach(device_t dev)
hdac_corb_init(sc);
hdac_rirb_init(sc);
result = hdac_irq_alloc(sc);
if (result != 0)
goto hdac_attach_fail;
/* Defer remaining of initialization until interrupts are enabled */
sc->intrhook.ich_func = hdac_attach2;
sc->intrhook.ich_arg = (void *)sc;