Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'irq-urgent-2024-04-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Ingo Molnar:
"Fix a bug in the GIC irqchip driver"
* tag 'irq-urgent-2024-04-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gic-v3-its: Fix VSYNC referencing an unmapped VPE on GIC v4.1
+7
-1
+7
-1
drivers/irqchip/irq-gic-v3-its.c
+7
-1
drivers/irqchip/irq-gic-v3-its.c
···
786
786
struct its_cmd_block *cmd,
787
787
struct its_cmd_desc *desc)
788
788
{
789
+
struct its_vpe *vpe = valid_vpe(its, desc->its_vmapp_cmd.vpe);
789
790
unsigned long vpt_addr, vconf_addr;
790
791
u64 target;
791
792
bool alloc;
···
799
798
if (is_v4_1(its)) {
800
799
alloc = !atomic_dec_return(&desc->its_vmapp_cmd.vpe->vmapp_count);
801
800
its_encode_alloc(cmd, alloc);
801
+
/*
802
+
* Unmapping a VPE is self-synchronizing on GICv4.1,
803
+
* no need to issue a VSYNC.
804
+
*/
805
+
vpe = NULL;
802
806
}
803
807
804
808
goto out;
···
838
832
out:
839
833
its_fixup_cmd(cmd);
840
834
841
-
return valid_vpe(its, desc->its_vmapp_cmd.vpe);
835
+
return vpe;
842
836
}
843
837
844
838
static struct its_vpe *its_build_vmapti_cmd(struct its_node *its,