Merge tag 's390-5.15-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Vasily Gorbik:
- Fix potential memory leak on a error path in eBPF
- Fix handling of zpci device on reserve
* tag 's390-5.15-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/pci: fix zpci_zdev_put() on reserve
bpf, s390: Fix potential memory leak about jit_data
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index e4803ec..6b3c366 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -207,6 +207,8 @@
int zpci_disable_device(struct zpci_dev *);
int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
int zpci_deconfigure_device(struct zpci_dev *zdev);
+void zpci_device_reserved(struct zpci_dev *zdev);
+bool zpci_is_device_configured(struct zpci_dev *zdev);
int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
int zpci_unregister_ioat(struct zpci_dev *, u8);
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
index 840d859..1a374d0 100644
--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -1826,7 +1826,7 @@
jit.addrs = kvcalloc(fp->len + 1, sizeof(*jit.addrs), GFP_KERNEL);
if (jit.addrs == NULL) {
fp = orig_fp;
- goto out;
+ goto free_addrs;
}
/*
* Three initial passes:
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index e7e6788..b833155 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -92,7 +92,7 @@
spin_unlock(&zpci_list_lock);
list_for_each_entry_safe(zdev, tmp, &remove, entry)
- zpci_zdev_put(zdev);
+ zpci_device_reserved(zdev);
}
int pci_domain_nr(struct pci_bus *bus)
@@ -751,6 +751,14 @@
return ERR_PTR(rc);
}
+bool zpci_is_device_configured(struct zpci_dev *zdev)
+{
+ enum zpci_state state = zdev->state;
+
+ return state != ZPCI_FN_STATE_RESERVED &&
+ state != ZPCI_FN_STATE_STANDBY;
+}
+
/**
* zpci_scan_configured_device() - Scan a freshly configured zpci_dev
* @zdev: The zpci_dev to be configured
@@ -822,6 +830,31 @@
return 0;
}
+/**
+ * zpci_device_reserved() - Mark device as resverved
+ * @zdev: the zpci_dev that was reserved
+ *
+ * Handle the case that a given zPCI function was reserved by another system.
+ * After a call to this function the zpci_dev can not be found via
+ * get_zdev_by_fid() anymore but may still be accessible via existing
+ * references though it will not be functional anymore.
+ */
+void zpci_device_reserved(struct zpci_dev *zdev)
+{
+ if (zdev->has_hp_slot)
+ zpci_exit_slot(zdev);
+ /*
+ * Remove device from zpci_list as it is going away. This also
+ * makes sure we ignore subsequent zPCI events for this device.
+ */
+ spin_lock(&zpci_list_lock);
+ list_del(&zdev->entry);
+ spin_unlock(&zpci_list_lock);
+ zdev->state = ZPCI_FN_STATE_RESERVED;
+ zpci_dbg(3, "rsv fid:%x\n", zdev->fid);
+ zpci_zdev_put(zdev);
+}
+
void zpci_release_device(struct kref *kref)
{
struct zpci_dev *zdev = container_of(kref, struct zpci_dev, kref);
@@ -843,6 +876,12 @@
case ZPCI_FN_STATE_STANDBY:
if (zdev->has_hp_slot)
zpci_exit_slot(zdev);
+ spin_lock(&zpci_list_lock);
+ list_del(&zdev->entry);
+ spin_unlock(&zpci_list_lock);
+ zpci_dbg(3, "rsv fid:%x\n", zdev->fid);
+ fallthrough;
+ case ZPCI_FN_STATE_RESERVED:
if (zdev->has_resources)
zpci_cleanup_bus_resources(zdev);
zpci_bus_device_unregister(zdev);
@@ -851,10 +890,6 @@
default:
break;
}
-
- spin_lock(&zpci_list_lock);
- list_del(&zdev->entry);
- spin_unlock(&zpci_list_lock);
zpci_dbg(3, "rem fid:%x\n", zdev->fid);
kfree(zdev);
}
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index c856f80..5b8d647 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -140,7 +140,7 @@
/* The 0x0304 event may immediately reserve the device */
if (!clp_get_state(zdev->fid, &state) &&
state == ZPCI_FN_STATE_RESERVED) {
- zpci_zdev_put(zdev);
+ zpci_device_reserved(zdev);
}
}
break;
@@ -151,7 +151,7 @@
case 0x0308: /* Standby -> Reserved */
if (!zdev)
break;
- zpci_zdev_put(zdev);
+ zpci_device_reserved(zdev);
break;
default:
break;
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index 0148687..dcefdb4 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -62,14 +62,7 @@
struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
hotplug_slot);
- switch (zdev->state) {
- case ZPCI_FN_STATE_STANDBY:
- *value = 0;
- break;
- default:
- *value = 1;
- break;
- }
+ *value = zpci_is_device_configured(zdev) ? 1 : 0;
return 0;
}
