From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 D435748F826; Sat, 12 Sep 2026 18:36:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789238187; cv=none; b=GRwaA738GIawiGBRmaPi2yNowh9uabxpjVq/kUT+I7lbqZD5BHhUbItbxD0XZ95yEJHnmTQK8MQc3RDT2uNkGZPhNQqXH95GGvBhDu5ISNwyBDPzw6DOFnhX0nWyWadRCwupAoqGR7FahjlTVMbE8fbfUwtif617Ndgtj89iZOQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789238187; c=relaxed/simple; bh=Q2O4qXhrMfWEP/ZwEZlV3jSfNiGCwDdSY6KLQs6iHKk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PGIVedzm49aeavflXDr85r0eFhn8FUwgE0EgIbqUFA+w8bZHYAj/a3QvKpzXqUPbbArKpgsUTPrqVoShegeIVNRGWp7eRAt4g7IRZenFtf795lm6rFaNUYpfSaviE3bqnET3dCGDSNicFxno2KBBuYRh9KPzJzltW6fL7xe8v5s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xFI8k1ZC; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="xFI8k1ZC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D7FD41F00893; Sat, 12 Sep 2026 18:36:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789238183; bh=Ynll/p32nYYVKFF6BLeN/bwoa04nSQTEDWK+st/QrzU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=xFI8k1ZCWZbQcN/oF1AkyK2RnJ9ZJB/w1H8c+JGbmBrVi1hdfCdPzBHj5toWqDmP5 qHCdye0E2j2PF7xyNiQTWhiMf2Kho81M+XYZ3vlCQEOpxBg230gG91txQUgFc7QxW5 kkXzWlWYdQwsji1lLMgdZifHB93RjCybFXnc2Z6Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zide Chen , "Peter Zijlstra (Intel)" , Ian Rogers , Dapeng Mi , Sasha Levin Subject: [PATCH 5.15 411/935] perf/x86/intel/uncore: Keep PCI PMUs working when MMIO/MSR setup fails Date: Sat, 12 Sep 2026 08:57:21 +0200 Message-ID: <20260912065536.249717791@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@linuxfoundation.org> User-Agent: quilt/0.69 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zide Chen [ Upstream commit 3012af7df3430788eddd30b3c6654d0a0a5f06c6 ] uncore_event_cpu_online() returns -ENOMEM early when both the MSR and MMIO box allocations fail. This also aborts PCI uncore setup, even though PCI PMUs are independent of the MSR/MMIO paths. Remove the early return so PCI uncore setup always runs regardless of whether MSR or MMIO box allocation succeeds. Fixes: 3da04b8a00dd ("perf/x86/intel/uncore: Support MMIO type uncore blocks") Signed-off-by: Zide Chen Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Ian Rogers Reviewed-by: Dapeng Mi Link: https://patch.msgid.link/20260611160033.66760-5-zide.chen@intel.com Signed-off-by: Sasha Levin --- arch/x86/events/intel/uncore.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c index 7e16c590f2593..25bf8dcaa9a28 100644 --- a/arch/x86/events/intel/uncore.c +++ b/arch/x86/events/intel/uncore.c @@ -1585,8 +1585,6 @@ static int uncore_event_cpu_online(unsigned int cpu) die = topology_logical_die_id(cpu); msr_ret = uncore_box_ref(uncore_msr_uncores, die, cpu); mmio_ret = uncore_box_ref(uncore_mmio_uncores, die, cpu); - if (msr_ret && mmio_ret) - return -ENOMEM; /* * Check if there is an online cpu in the package -- 2.53.0