Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "Four bug fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/dasd: fix wrongly assigned configuration data
  s390: fix preemption race in disable_sacf_uaccess
  s390/sclp: disable FORTIFY_SOURCE for early sclp code
  s390/pci: handle insufficient resources during dma tlb flush

5 files changed, 35 insertions, 3 deletions

diff --git a/arch/s390/lib/uaccess.c b/arch/s390/lib/uaccess.c
index cae5a1e16cbd..c4f8039a35e8 100644
--- a/arch/s390/lib/uaccess.c
+++ b/arch/s390/lib/uaccess.c
@@ -89,11 +89,11 @@ EXPORT_SYMBOL(enable_sacf_uaccess);
 
 void disable_sacf_uaccess(mm_segment_t old_fs)
 {
+        current->thread.mm_segment = old_fs;
         if (old_fs == USER_DS && test_facility(27)) {
                 __ctl_load(S390_lowcore.user_asce, 1, 1);
                 clear_cpu_flag(CIF_ASCE_PRIMARY);
         }
-        current->thread.mm_segment = old_fs;
 }
 EXPORT_SYMBOL(disable_sacf_uaccess);
 
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index f7aa5a77827e..2d15d84c20ed 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -181,6 +181,9 @@ out_unlock:
 static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr,
                            size_t size, int flags)
 {
+        unsigned long irqflags;
+        int ret;
+
         /*
          * With zdev->tlb_refresh == 0, rpcit is not required to establish new
          * translations when previously invalid translation-table entries are
@@ -196,8 +199,22 @@ static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr,
                         return 0;
         }
 
-        return zpci_refresh_trans((u64) zdev->fh << 32, dma_addr,
-                                  PAGE_ALIGN(size));
+        ret = zpci_refresh_trans((u64) zdev->fh << 32, dma_addr,
+                                 PAGE_ALIGN(size));
+        if (ret == -ENOMEM && !s390_iommu_strict) {
+                /* enable the hypervisor to free some resources */
+                if (zpci_refresh_global(zdev))
+                        goto out;
+
+                spin_lock_irqsave(&zdev->iommu_bitmap_lock, irqflags);
+                bitmap_andnot(zdev->iommu_bitmap, zdev->iommu_bitmap,
+                              zdev->lazy_bitmap, zdev->iommu_pages);
+                bitmap_zero(zdev->lazy_bitmap, zdev->iommu_pages);
+                spin_unlock_irqrestore(&zdev->iommu_bitmap_lock, irqflags);
+                ret = 0;
+        }
+out:
+        return ret;
 }
 
 static int dma_update_trans(struct zpci_dev *zdev, unsigned long pa,
diff --git a/arch/s390/pci/pci_insn.c b/arch/s390/pci/pci_insn.c
index 19bcb3b45a70..f069929e8211 100644
--- a/arch/s390/pci/pci_insn.c
+++ b/arch/s390/pci/pci_insn.c
@@ -89,6 +89,9 @@ int zpci_refresh_trans(u64 fn, u64 addr, u64 range)
         if (cc)
                 zpci_err_insn(cc, status, addr, range);
 
+        if (cc == 1 && (status == 4 || status == 16))
+                return -ENOMEM;
+
         return (cc) ? -EIO : 0;
 }
 
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index c94b606e0df8..ee14d8e45c97 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -2803,6 +2803,16 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr)
                 erp = dasd_3990_erp_handle_match_erp(cqr, erp);
         }
 
+
+        /*
+         * For path verification work we need to stick with the path that was
+         * originally chosen so that the per path configuration data is
+         * assigned correctly.
+         */
+        if (test_bit(DASD_CQR_VERIFY_PATH, &erp->flags) && cqr->lpm) {
+                erp->lpm = cqr->lpm;
+        }
+
         if (device->features & DASD_FEATURE_ERPLOG) {
                 /* print current erp_chain */
                 dev_err(&device->cdev->dev,
diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile
index 05ac6ba15a53..614b44e70a28 100644
--- a/drivers/s390/char/Makefile
+++ b/drivers/s390/char/Makefile
@@ -17,6 +17,8 @@ CFLAGS_REMOVE_sclp_early_core.o	+= $(CC_FLAGS_MARCH)
 CFLAGS_sclp_early_core.o                += -march=z900
 endif
 
+CFLAGS_sclp_early_core.o                += -D__NO_FORTIFY
+
 obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
          sclp_cmd.o sclp_config.o sclp_cpi_sys.o sclp_ocf.o sclp_ctl.o \
          sclp_early.o sclp_early_core.o