From dca7da244349eef4d78527cafc0bf80816b261f5 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Tue, 25 Nov 2025 15:23:02 +0100 Subject: [PATCH] parisc: Do not reprogram affinitiy on ASP chip 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 Cc: stable@vger.kernel.org --- drivers/parisc/gsc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/parisc/gsc.c b/drivers/parisc/gsc.c index a0daaa548bc39..8ba778170447e 100644 --- a/drivers/parisc/gsc.c +++ b/drivers/parisc/gsc.c @@ -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); -- 2.47.3