linux-kernel - [PATCH hyperv-next v3 09/15] Drivers: hv: Use memunmap() to check if the address is in IO map

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Message-ID: <20250604004341.7194-10-romank@linux.microsoft.com>
Date: Tue,  3 Jun 2025 17:43:35 -0700
From: Roman Kisel <romank@...ux.microsoft.com>
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Subject: [PATCH hyperv-next v3 09/15] Drivers: hv: Use memunmap() to check if the address is in IO map

It might happen that some hyp SynIC pages aren't IO mapped.

Use memunmap() that checks for that and only then calls iounmap()

Signed-off-by: Roman Kisel <romank@...ux.microsoft.com>
---
 drivers/hv/hv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 6a4857def82d..9a66656d89e0 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -358,7 +358,7 @@ void hv_synic_disable_regs(unsigned int cpu)
 	 */
 	simp.simp_enabled = 0;
 	if (ms_hyperv.paravisor_present || hv_root_partition()) {
-		iounmap(hv_cpu->hyp_synic_message_page);
+		memunmap(hv_cpu->hyp_synic_message_page);
 		hv_cpu->hyp_synic_message_page = NULL;
 	} else {
 		simp.base_simp_gpa = 0;
@@ -370,7 +370,7 @@ void hv_synic_disable_regs(unsigned int cpu)
 	siefp.siefp_enabled = 0;
 
 	if (ms_hyperv.paravisor_present || hv_root_partition()) {
-		iounmap(hv_cpu->hyp_synic_event_page);
+		memunmap(hv_cpu->hyp_synic_event_page);
 		hv_cpu->hyp_synic_event_page = NULL;
 	} else {
 		siefp.base_siefp_gpa = 0;
-- 
2.43.0