admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

parisc: Do not reprogram affinitiy on ASP chip

Browse Source 
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
This commit is contained in:
Helge Deller
2025-11-25 15:23:02 +01:00
parent 75b51437a4
commit dca7da2443
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/parisc/gsc.c
View File

@@ -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);