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Tue, 13 May 2025 10:58:03 GMT Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 832BD58064; Tue, 13 May 2025 10:58:03 +0000 (GMT) Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B35FF5803F; Tue, 13 May 2025 10:58:00 +0000 (GMT) Received: from [9.111.68.46] (unknown [9.111.68.46]) by smtpav03.dal12v.mail.ibm.com (Postfix) with ESMTP; Tue, 13 May 2025 10:58:00 +0000 (GMT) Message-ID: Subject: Re: [PATCH] PCI/ERR: s390/pci: Use pci_uevent_ers() in PCI recovery From: Niklas Schnelle To: Lukas Wunner , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Bjorn Helgaas , Peter Oberparleiter , Matthew Rosato , Mahesh J Salgaonkar , "Oliver O'Halloran" Cc: linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Date: Tue, 13 May 2025 12:57:59 +0200 In-Reply-To: <20250424-add_err_uevents-v1-1-3384d6b779c6@linux.ibm.com> References: <20250424-add_err_uevents-v1-1-3384d6b779c6@linux.ibm.com> Autocrypt: addr=schnelle@linux.ibm.com; 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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.1 (3.56.1-1.fc42) Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Ut2ivt-u5QJSSOIiaiagLtfdjydYMmhg X-Proofpoint-ORIG-GUID: 8E81g7jIrpP88tlhpeoDOkb8rA8lS2Xv X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTEzMDEwMSBTYWx0ZWRfX5AH0d8fiklFk zM4wd6VO0fzHyiPB3QvQly2sj/NJaNY/TkT8fCjUXGpZ+eomb0CKJMfYizooYvFF33yrgsYpMGu bCoI4ibnuQx1GVDlhH+Rv8UG5fkBLWvpHxD+s6zB/I4HK8ty1qVgBUtwmb6i6ScHXyot61uOnPQ LXO3d8tTP7XeXEJXipltf5rWYa853j4q3Uz4nsjqJCu26Mw5Qk9AjMHJ2Altm1ZyEu3NuumHVcq BYTxzPhl0eOr4fI1T8dSEHcal8T/rQsaHLYwwKY++BxQwPa+nQIix4Uy5RuVgTt2RZOhy5NtBHJ 9E9WCCdfGwtB4HLt8bTv/TeXqwgBsbW5fUOb+cCADNbsva8cFTgtVpWh19C/bZZA+tcmYS5wp6R Q6nlHzhzZ+wyvxFUd++b9VrOJGvIs7Rjg2mLR6H1MFJIwvEjKIN9KjzbhgenNVRea55WxJWt X-Authority-Analysis: v=2.4 cv=e+sGSbp/ c=1 sm=1 tr=0 ts=682325be cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=nbiFzm51mJyoxPHMFpAA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-12_07,2025-05-09_01,2025-02-21_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 spamscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 impostorscore=0 mlxlogscore=999 clxscore=1015 mlxscore=0 bulkscore=0 adultscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2504070000 definitions=main-2505130101 On Thu, 2025-04-24 at 14:02 +0200, Niklas Schnelle wrote: > Issue uevents during PCI recovery using pci_uevent_ers() as done by EEH > and AER PCIe recovery routines. >=20 > Cc: stable@vger.kernel.org > Fixes: 4cdf2f4e24ff ("s390/pci: implement minimal PCI error recovery") > Signed-off-by: Niklas Schnelle > --- > Question: pci_uevent_ers() ignores PCI_ERS_RESULT_NEED_RESET which also > means that unless we use PCI_ERS_RESULT_NONE instead of the return of > error_detected() like EEH also does. there is no event for beginning > recovery. This is also true for AER and seems odd, is this intentional? >=20 > Npte: The fixes tag / Cc stable is maybe a bit borderline but I think > having the events on EEH and AER but not on s390 warrants it. Thoughts? > --- > arch/s390/pci/pci_event.c | 3 +++ > drivers/pci/pci-driver.c | 2 +- > include/linux/pci.h | 2 +- > 3 files changed, 5 insertions(+), 2 deletions(-) >=20 > diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c > index 7bd7721c1239a20e13cd3c618cce6679f36b0d06..37609bc2b514c00b5b91d6edd= 2ec366d59ae9f49 100644 > --- a/arch/s390/pci/pci_event.c > +++ b/arch/s390/pci/pci_event.c > @@ -91,6 +91,7 @@ static pci_ers_result_t zpci_event_notify_error_detecte= d(struct pci_dev *pdev, > pci_ers_result_t ers_res =3D PCI_ERS_RESULT_DISCONNECT; > =20 > ers_res =3D driver->err_handler->error_detected(pdev, pdev->error_stat= e); > + pci_uevent_ers(pdev, PCI_ERS_RESULT_NONE); > if (ers_result_indicates_abort(ers_res)) > pr_info("%s: Automatic recovery failed after initial reporting\n", pci= _name(pdev)); > else if (ers_res =3D=3D PCI_ERS_RESULT_NEED_RESET) > @@ -226,6 +227,7 @@ static pci_ers_result_t zpci_event_attempt_error_reco= very(struct pci_dev *pdev) > ers_res =3D zpci_event_do_reset(pdev, driver); > =20 > if (ers_res !=3D PCI_ERS_RESULT_RECOVERED) { > + pci_uevent_ers(pdev, PCI_ERS_RESULT_DISCONNECT); > pr_err("%s: Automatic recovery failed; operator intervention is requir= ed\n", > pci_name(pdev)); > status_str =3D "failed (driver can't recover)"; > @@ -235,6 +237,7 @@ static pci_ers_result_t zpci_event_attempt_error_reco= very(struct pci_dev *pdev) > pr_info("%s: The device is ready to resume operations\n", pci_name(pdev= )); > if (driver->err_handler->resume) > driver->err_handler->resume(pdev); > + pci_uevent_ers(pdev, PCI_ERS_RESULT_RECOVERED); > out_unlock: > pci_dev_unlock(pdev); > zpci_report_status(zdev, "recovery", status_str); > diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c > index c8bd71a739f724e09b4dd773fb0cf74bddda1728..5cc031fae9a0210d66959ce60= 82539e52cdd81b4 100644 > --- a/drivers/pci/pci-driver.c > +++ b/drivers/pci/pci-driver.c > @@ -1584,7 +1584,7 @@ static int pci_uevent(const struct device *dev, str= uct kobj_uevent_env *env) > return 0; > } > =20 > -#if defined(CONFIG_PCIEAER) || defined(CONFIG_EEH) > +#if defined(CONFIG_PCIEAER) || defined(CONFIG_EEH) || defined(CONFIG_S39= 0) > /** > * pci_uevent_ers - emit a uevent during recovery path of PCI device > * @pdev: PCI device undergoing error recovery > diff --git a/include/linux/pci.h b/include/linux/pci.h > index 0e8e3fd77e96713054388bdc82f439e51023c1bf..71628a9c61bd7bc90fdbd9bc6= ab68603ac8800dd 100644 > --- a/include/linux/pci.h > +++ b/include/linux/pci.h > @@ -2688,7 +2688,7 @@ static inline bool pci_is_thunderbolt_attached(stru= ct pci_dev *pdev) > return false; > } > =20 > -#if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH) > +#if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH) || defined(CONFIG= _S390) > void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type)= ; > #endif > =20 >=20 > --- > base-commit: 8ffd015db85fea3e15a77027fda6c02ced4d2444 > change-id: 20250417-add_err_uevents-6f8d4d7ce09c >=20 > Best regards, Gentle ping.