mm: memory-failure: fix unexpected return value in soft_offline_page()
[ Upstream commite2c1ab070f
] When page_handle_poison() fails to handle the hugepage or free page in retry path, soft_offline_page() will return 0 while -EBUSY is expected in this case. Consequently the user will think soft_offline_page succeeds while it in fact failed. So the user will not try again later in this case. Link: https://lkml.kernel.org/r/20230627112808.1275241-1-linmiaohe@huawei.com Fixes:b94e02822d
("mm,hwpoison: try to narrow window race for free pages") Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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0712721e4f
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1c41cd30d5
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@ -2284,10 +2284,13 @@ retry:
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if (ret > 0) {
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ret = soft_offline_in_use_page(page);
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} else if (ret == 0) {
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if (!page_handle_poison(page, true, false) && try_again) {
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try_again = false;
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flags &= ~MF_COUNT_INCREASED;
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goto retry;
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if (!page_handle_poison(page, true, false)) {
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if (try_again) {
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try_again = false;
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flags &= ~MF_COUNT_INCREASED;
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goto retry;
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}
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ret = -EBUSY;
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}
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}
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