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parisc: Do not reprogram affinitiy on ASP chip

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commit dca7da244349eef4d78527cafc0bf80816b261f5 upstream.

The ASP chip is a very old variant of the GSP chip and is used e.g. in
HP 730 workstations. When trying to reprogram the affinity it will crash
with a HPMC as the relevant registers don't seem to be at the usual
location.  Let's avoid the crash by checking the sversion. Also note,
that reprogramming isn't necessary either, as the HP730 is a just a
single-CPU machine.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Helge Deller
2025-11-25 15:23:02 +01:00
committed by Greg Kroah-Hartman
parent 062774439d
commit e09fd2eb6d
1 changed files with 3 additions and 1 deletions
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4
drivers/parisc/gsc.c
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@@ -154,7 +154,9 @@ static int gsc_set_affinity_irq(struct irq_data *d, const struct cpumask *dest,
gsc_dev->eim = ((u32) gsc_dev->gsc_irq.txn_addr) | gsc_dev->gsc_irq.txn_data;
/* switch IRQ's for devices below LASI/WAX to other CPU */
gsc_writel(gsc_dev->eim, gsc_dev->hpa + OFFSET_IAR);
/* ASP chip (svers 0x70) does not support reprogramming */
if (gsc_dev->gsc->id.sversion != 0x70)
gsc_writel(gsc_dev->eim, gsc_dev->hpa + OFFSET_IAR);
irq_data_update_effective_affinity(d, &tmask);