From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 76D22364CF for ; Wed, 15 Nov 2023 19:25:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="uyQjlcZy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2809DC433C9; Wed, 15 Nov 2023 19:25:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700076342; bh=LCdbfv1oWqVcFQX7LQIJBzT/IeHrIgp+W/EgPtY8IZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uyQjlcZyhPcQKqvq9BhkQIVGEPsolOgH8OQczVfo+w2XcLi9Q1ZrZy0yXDNYaIIZg +YD5rJmytMC7Zqs5j8o5/g3ujiKtMWTLHjUccocZpZlIIhEPJg2gXE3Adco3gKiM8U ByUZzjmf5s5cpzIcSV7pf2YkhgYXR3Fh3O3QHu5o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Alex Sierra , Felix Kuehling , Alex Deucher , Sasha Levin Subject: [PATCH 6.5 231/550] drm/amdkfd: retry after EBUSY is returned from hmm_ranges_get_pages Date: Wed, 15 Nov 2023 14:13:35 -0500 Message-ID: <20231115191616.739559575@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115191600.708733204@linuxfoundation.org> References: <20231115191600.708733204@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Sierra [ Upstream commit ebac9414a56a5f7c336db5f5c7cc34713b649407 ] if hmm_range_get_pages returns EBUSY error during svm_range_validate_and_map, within the context of a page fault interrupt. This should retry through svm_range_restore_pages callback. Therefore we treat this as EAGAIN error instead, and defer it to restore pages fallback. Signed-off-by: Alex Sierra Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher Stable-dep-of: eb3c357bcb28 ("drm/amdkfd: Handle errors from svm validate and map") Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index a9b57c66cb7d7..4c1b72194a6f8 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -1651,6 +1651,8 @@ static int svm_range_validate_and_map(struct mm_struct *mm, WRITE_ONCE(p->svms.faulting_task, NULL); if (r) { pr_debug("failed %d to get svm range pages\n", r); + if (r == -EBUSY) + r = -EAGAIN; goto unreserve_out; } -- 2.42.0