Merge branch 'parisc-4.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:
 "Fix the boot crash on Mako machines with Huge Pages, prevent a panic
  with SATA controllers (and others) by correctly calculating the IOMMU
  space, hook up the mlock2 syscall and drop unneeded code in the parisc
  pci code"

* 'parisc-4.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Disable huge pages on Mako machines
  parisc: Wire up mlock2 syscall
  parisc: Remove unused pcibios_init_bus()
  parisc iommu: fix panic due to trying to allocate too large region

5 files changed, 13 insertions, 27 deletions

diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index d8534f95915a..291cee28ccb6 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -372,7 +372,8 @@ static inline pte_t pte_mkspecial(pte_t pte)	{ return pte; }
  */
 #ifdef CONFIG_HUGETLB_PAGE
 #define pte_huge(pte)           (pte_val(pte) & _PAGE_HUGE)
-#define pte_mkhuge(pte)         (__pte(pte_val(pte) | _PAGE_HUGE))
+#define pte_mkhuge(pte)         (__pte(pte_val(pte) | \
+                                 (parisc_requires_coherency() ? 0 : _PAGE_HUGE)))
 #else
 #define pte_huge(pte)           (0)
 #define pte_mkhuge(pte)         (pte)
diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h
index 33170384d3ac..35bdccbb2036 100644
--- a/arch/parisc/include/uapi/asm/unistd.h
+++ b/arch/parisc/include/uapi/asm/unistd.h
@@ -360,8 +360,9 @@
 #define __NR_execveat           (__NR_Linux + 342)
 #define __NR_membarrier         (__NR_Linux + 343)
 #define __NR_userfaultfd        (__NR_Linux + 344)
+#define __NR_mlock2             (__NR_Linux + 345)
 
-#define __NR_Linux_syscalls     (__NR_userfaultfd + 1)
+#define __NR_Linux_syscalls     (__NR_mlock2 + 1)
 
 
 #define __IGNORE_select         /* newselect */
diff --git a/arch/parisc/kernel/pci.c b/arch/parisc/kernel/pci.c
index 64f2764a8cef..c99f3dde455c 100644
--- a/arch/parisc/kernel/pci.c
+++ b/arch/parisc/kernel/pci.c
@@ -171,24 +171,6 @@ void pcibios_set_master(struct pci_dev *dev)
 }
 
 
-void __init pcibios_init_bus(struct pci_bus *bus)
-{
-        struct pci_dev *dev = bus->self;
-        unsigned short bridge_ctl;
-
-        /* We deal only with pci controllers and pci-pci bridges. */
-        if (!dev || (dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
-                return;
-
-        /* PCI-PCI bridge - set the cache line and default latency
-           (32) for primary and secondary buses. */
-        pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 32);
-
-        pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &bridge_ctl);
-        bridge_ctl |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR;
-        pci_write_config_word(dev, PCI_BRIDGE_CONTROL, bridge_ctl);
-}
-
 /*
  * pcibios align resources() is called every time generic PCI code
  * wants to generate a new address. The process of looking for
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 78c3ef8c348d..d4ffcfbc9885 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -440,6 +440,7 @@
         ENTRY_COMP(execveat)
         ENTRY_SAME(membarrier)
         ENTRY_SAME(userfaultfd)
+        ENTRY_SAME(mlock2)              /* 345 */
 
 
 .ifne (. - 90b) - (__NR_Linux_syscalls * (91b - 90b))
diff --git a/drivers/parisc/iommu-helpers.h b/drivers/parisc/iommu-helpers.h
index 761e77bfce5d..e56f1569f6c3 100644
--- a/drivers/parisc/iommu-helpers.h
+++ b/drivers/parisc/iommu-helpers.h
@@ -104,7 +104,11 @@ iommu_coalesce_chunks(struct ioc *ioc, struct device *dev,
         struct scatterlist *contig_sg;     /* contig chunk head */
         unsigned long dma_offset, dma_len; /* start/len of DMA stream */
         unsigned int n_mappings = 0;
-        unsigned int max_seg_size = dma_get_max_seg_size(dev);
+        unsigned int max_seg_size = min(dma_get_max_seg_size(dev),
+                                        (unsigned)DMA_CHUNK_SIZE);
+        unsigned int max_seg_boundary = dma_get_seg_boundary(dev) + 1;
+        if (max_seg_boundary)   /* check if the addition above didn't overflow */
+                max_seg_size = min(max_seg_size, max_seg_boundary);
 
         while (nents > 0) {
 
@@ -138,14 +142,11 @@ iommu_coalesce_chunks(struct ioc *ioc, struct device *dev,
 
                         /*
                         ** First make sure current dma stream won't
-                        ** exceed DMA_CHUNK_SIZE if we coalesce the
+                        ** exceed max_seg_size if we coalesce the
                         ** next entry.
                         */   
-                        if(unlikely(ALIGN(dma_len + dma_offset + startsg->length,
-                                            IOVP_SIZE) > DMA_CHUNK_SIZE))
-                                break;
-
-                        if (startsg->length + dma_len > max_seg_size)
+                        if (unlikely(ALIGN(dma_len + dma_offset + startsg->length, IOVP_SIZE) >
+                                     max_seg_size))
                                 break;
 
                         /*