From 57b5918c33a0797930c3791fb602a8a9d46ef80c Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Thu, 29 Aug 2013 19:40:01 +0200 Subject: s390/pci: update function handle after resume from hibernate Function handles may change while the system was in hibernation use list pci functions and update the function handles. Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- arch/s390/pci/pci.c | 15 ++++++++++----- arch/s390/pci/pci_clp.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+), 5 deletions(-) (limited to 'arch/s390/pci') diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index a7ed6685e7fb..f17a8343e360 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -46,7 +46,7 @@ /* list of all detected zpci devices */ static LIST_HEAD(zpci_list); -static DEFINE_MUTEX(zpci_list_lock); +static DEFINE_SPINLOCK(zpci_list_lock); static void zpci_enable_irq(struct irq_data *data); static void zpci_disable_irq(struct irq_data *data); @@ -88,14 +88,14 @@ struct zpci_dev *get_zdev_by_fid(u32 fid) { struct zpci_dev *tmp, *zdev = NULL; - mutex_lock(&zpci_list_lock); + spin_lock(&zpci_list_lock); list_for_each_entry(tmp, &zpci_list, entry) { if (tmp->fid == fid) { zdev = tmp; break; } } - mutex_unlock(&zpci_list_lock); + spin_unlock(&zpci_list_lock); return zdev; } @@ -821,9 +821,9 @@ int zpci_create_device(struct zpci_dev *zdev) if (rc) goto out_disable; - mutex_lock(&zpci_list_lock); + spin_lock(&zpci_list_lock); list_add_tail(&zdev->entry, &zpci_list); - mutex_unlock(&zpci_list_lock); + spin_unlock(&zpci_list_lock); zpci_init_slot(zdev); @@ -939,3 +939,8 @@ out: return rc; } subsys_initcall_sync(pci_base_init); + +void zpci_rescan(void) +{ + clp_rescan_pci_devices_simple(); +} diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c index 3eaf63a6ecac..475563c3d1e4 100644 --- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -319,6 +319,20 @@ static void __clp_rescan(struct clp_fh_list_entry *entry) } } +static void __clp_update(struct clp_fh_list_entry *entry) +{ + struct zpci_dev *zdev; + + if (!entry->vendor_id) + return; + + zdev = get_zdev_by_fid(entry->fid); + if (!zdev) + return; + + zdev->fh = entry->fh; +} + int clp_scan_pci_devices(void) { struct clp_req_rsp_list_pci *rrb; @@ -348,3 +362,18 @@ int clp_rescan_pci_devices(void) clp_free_block(rrb); return rc; } + +int clp_rescan_pci_devices_simple(void) +{ + struct clp_req_rsp_list_pci *rrb; + int rc; + + rrb = clp_alloc_block(GFP_NOWAIT); + if (!rrb) + return -ENOMEM; + + rc = clp_list_pci(rrb, __clp_update); + + clp_free_block(rrb); + return rc; +} -- cgit v1.2.3