6.6-stable review patch. If anyone has any objections, please let me know.
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From: Niklas Schnelle schnelle@linux.ibm.com
commit b97a7972b1f4f81417840b9a2ab0c19722b577d5 upstream.
If a device is disabled unblocking load/store on its own is not useful as a full re-enable of the function is necessary anyway. Note that SCLP Write Event Data Action Qualifier 0 (Reset) leaves the device disabled and triggers this case unless the driver already requests a reset.
Cc: stable@vger.kernel.org Fixes: 4cdf2f4e24ff ("s390/pci: implement minimal PCI error recovery") Reviewed-by: Farhan Ali alifm@linux.ibm.com Signed-off-by: Niklas Schnelle schnelle@linux.ibm.com Signed-off-by: Alexander Gordeev agordeev@linux.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/s390/pci/pci_event.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/arch/s390/pci/pci_event.c +++ b/arch/s390/pci/pci_event.c @@ -98,6 +98,10 @@ static pci_ers_result_t zpci_event_do_er struct zpci_dev *zdev = to_zpci(pdev); int rc;
+ /* The underlying device may have been disabled by the event */ + if (!zdev_enabled(zdev)) + return PCI_ERS_RESULT_NEED_RESET; + pr_info("%s: Unblocking device access for examination\n", pci_name(pdev)); rc = zpci_reset_load_store_blocked(zdev); if (rc) {