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 D87F56FA0 for ; Mon, 16 Jan 2023 16:50:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5E575C433EF; Mon, 16 Jan 2023 16:50:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673887815; bh=Pnx/334rTdCwTSr4Ug0TzdTcVaCqC/Wapej3cToWBag=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L7jVamSKyUKxDOPoVt6UtWwhLVd50O/m5MjPFRE3pLWQ60DM7iR6XM0tXoM6IFKkZ Ng4moGtD4rmY8F3/7Ep8qstVwMv+/AkZgsYtyKlcPeB/KC3BQkjcbv0rhIKdkOV/VY oscwUXwJ01P9Kr1L2MWbJSPcqlBtBS+ipnKdueWE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sam Bobroff , Michael Ellerman , Nathan Lynch , Sasha Levin Subject: [PATCH 4.19 291/521] powerpc/eeh: Fix pseries_eeh_configure_bridge() Date: Mon, 16 Jan 2023 16:49:13 +0100 Message-Id: <20230116154900.139434163@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154847.246743274@linuxfoundation.org> References: <20230116154847.246743274@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Sam Bobroff [ Upstream commit 6fa13640aea7bb0760846981aa2da4245307bd26 ] If a device is hot unplgged during EEH recovery, it's possible for the RTAS call to ibm,configure-pe in pseries_eeh_configure() to return parameter error (-3), however negative return values are not checked for and this leads to an infinite loop. Fix this by correctly bailing out on negative values. Signed-off-by: Sam Bobroff Signed-off-by: Michael Ellerman Reviewed-by: Nathan Lynch Link: https://lore.kernel.org/r/1b0a6010a647dc915816e44845b64d72066676a7.1588045502.git.sbobroff@linux.ibm.com Stable-dep-of: 9aafbfa5f57a ("powerpc/pseries/eeh: use correct API for error log size") Signed-off-by: Sasha Levin --- arch/powerpc/platforms/pseries/eeh_pseries.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c index 2713d2aa963c..0fc93f7e167d 100644 --- a/arch/powerpc/platforms/pseries/eeh_pseries.c +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c @@ -684,6 +684,8 @@ static int pseries_eeh_configure_bridge(struct eeh_pe *pe) if (!ret) return ret; + if (ret < 0) + break; /* * If RTAS returns a delay value that's above 100ms, cut it @@ -704,7 +706,11 @@ static int pseries_eeh_configure_bridge(struct eeh_pe *pe) pr_warn("%s: Unable to configure bridge PHB#%x-PE#%x (%d)\n", __func__, pe->phb->global_number, pe->addr, ret); - return ret; + /* PAPR defines -3 as "Parameter Error" for this function: */ + if (ret == -3) + return -EINVAL; + else + return -EIO; } /** -- 2.35.1