[PATCH] mm/memory-failure: fix hardware poison check in unpoison_memory()

[Sidhartha Kumar]

It was pointed out[1] that using folio_test_hwpoison() is wrong
as we need to check the indiviual page that has poison.
folio_test_hwpoison() only checks the head page so go back to using
PageHWPoison().

Reported-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Fixes: a6fddef49eef ("mm/memory-failure: convert unpoison_memory() to folios")
Cc: stable@xxxxxxxxxxxxxxx #v6.4
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>

[1]: https://lore.kernel.org/lkml/ZLIbZygG7LqSI9xe@xxxxxxxxxxxxxxxxxxxx/
---
 mm/memory-failure.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 02b1d8f104d51..a114c8c3039cd 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -2523,7 +2523,7 @@ int unpoison_memory(unsigned long pfn)
 		goto unlock_mutex;
 	}
 
-	if (!folio_test_hwpoison(folio)) {
+	if (!PageHWPoison(p)) {
 		unpoison_pr_info("Unpoison: Page was already unpoisoned %#lx\n",
 				 pfn, &unpoison_rs);
 		goto unlock_mutex;
-- 
2.41.0