Fix a bug in the GIC irqchip driver.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmYbiokRHG1pbmdvQGtl
 cm5lbC5vcmcACgkQEnMQ0APhK1gJYA/9H/PcIkd4sxL6gamb6JPAlahgQOm3BUft
 MvnJERyn1AZDLQXW2P2BybMnT2CfuAZSUlt9Na+SCMkUKlN/72whJ+IEfzQx9OIW
 XdrbXOs62CBPSCJY+elvIj7JQkSLulwJBgo7OuSNMyZVjmsEKPmaqcWpbGFmLhTw
 xwE4hO/mU03IBm9KIcH0qc8ryhsbHmC/EjyahWWWy3HpS8/ZqrkXGUhFGkslIZ5B
 lM8xr5BmbK8rCw+y9NQlLfZDqcFPmtqvt+BhXsA2H9Iv22lYUUECra3NqGbpVKrd
 qSCUwmTHMMxsr+Mvr6uOudNNAJG467xG9HzLntnDRxLEGBuNgch5xBS6tDzJ9Cv1
 l3khrsRsNt4kcMtKJxSip+VVZyBz+KMuj7ZPEH+Whq/MEYeQ0UZPaGIe5+gZa6S2
 LExKDRhedjGo03fA8BquLlpV9kFoHUuQpJOv0eVs8xK98t+Rdf4UaE+cRZSz96Xg
 aF7ztg/UgduXpLzY7CdKf3k1O5jBClxM6QyrjC9kFv48YwqXG9cAkkhNHHvcgQ7q
 CzVe36u44SRW2dcCaFzA2wTCRlKwwIupcdeWZL3+5sgta5FnLRShxiZBhA4NZoZ4
 tTYDFqmVORrf+we3tzyyeC/ye+222xaY8D9Qo+UvDhNXkjjK9ncyKLuPwSCinGQo
 uRvI8HxubuI=
 =K0bw
 -----END PGP SIGNATURE-----

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
This commit is contained in:
Linus Torvalds 2024-04-14 10:12:34 -07:00
commit c28275e743

View File

@ -786,6 +786,7 @@ static struct its_vpe *its_build_vmapp_cmd(struct its_node *its,
struct its_cmd_block *cmd,
struct its_cmd_desc *desc)
{
struct its_vpe *vpe = valid_vpe(its, desc->its_vmapp_cmd.vpe);
unsigned long vpt_addr, vconf_addr;
u64 target;
bool alloc;
@ -798,6 +799,11 @@ static struct its_vpe *its_build_vmapp_cmd(struct its_node *its,
if (is_v4_1(its)) {
alloc = !atomic_dec_return(&desc->its_vmapp_cmd.vpe->vmapp_count);
its_encode_alloc(cmd, alloc);
/*
* Unmapping a VPE is self-synchronizing on GICv4.1,
* no need to issue a VSYNC.
*/
vpe = NULL;
}
goto out;
@ -832,7 +838,7 @@ static struct its_vpe *its_build_vmapp_cmd(struct its_node *its,
out:
its_fixup_cmd(cmd);
return valid_vpe(its, desc->its_vmapp_cmd.vpe);
return vpe;
}
static struct its_vpe *its_build_vmapti_cmd(struct its_node *its,