Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 25 insertions, 5 deletions

diff --git a/fs/ntfs/logfile.c b/fs/ntfs/logfile.c
index 0173e95500d9..0fd70295cca6 100644
--- a/fs/ntfs/logfile.c
+++ b/fs/ntfs/logfile.c
@@ -51,7 +51,8 @@ static BOOL ntfs_check_restart_page_header(struct inode *vi,
                 RESTART_PAGE_HEADER *rp, s64 pos)
 {
         u32 logfile_system_page_size, logfile_log_page_size;
-        u16 usa_count, usa_ofs, usa_end, ra_ofs;
+        u16 ra_ofs, usa_count, usa_ofs, usa_end = 0;
+        BOOL have_usa = TRUE;
 
         ntfs_debug("Entering.");
         /*
@@ -86,6 +87,14 @@ static BOOL ntfs_check_restart_page_header(struct inode *vi,
                                 (int)sle16_to_cpu(rp->minor_ver));
                 return FALSE;
         }
+        /*
+         * If chkdsk has been run the restart page may not be protected by an
+         * update sequence array.
+         */
+        if (ntfs_is_chkd_record(rp->magic) && !le16_to_cpu(rp->usa_count)) {
+                have_usa = FALSE;
+                goto skip_usa_checks;
+        }
         /* Verify the size of the update sequence array. */
         usa_count = 1 + (logfile_system_page_size >> NTFS_BLOCK_SIZE_BITS);
         if (usa_count != le16_to_cpu(rp->usa_count)) {
@@ -102,6 +111,7 @@ static BOOL ntfs_check_restart_page_header(struct inode *vi,
                                 "inconsistent update sequence array offset.");
                 return FALSE;
         }
+skip_usa_checks:
         /*
          * Verify the position of the restart area.  It must be:
          *      - aligned to 8-byte boundary,
@@ -109,7 +119,8 @@ static BOOL ntfs_check_restart_page_header(struct inode *vi,
          *      - within the system page size.
          */
         ra_ofs = le16_to_cpu(rp->restart_area_offset);
-        if (ra_ofs & 7 || ra_ofs < usa_end ||
+        if (ra_ofs & 7 || (have_usa ? ra_ofs < usa_end :
+                        ra_ofs < sizeof(RESTART_PAGE_HEADER)) ||
                         ra_ofs > logfile_system_page_size) {
                 ntfs_error(vi->i_sb, "$LogFile restart page specifies "
                                 "inconsistent restart area offset.");
@@ -402,8 +413,12 @@ static int ntfs_check_and_load_restart_page(struct inode *vi,
                         idx++;
                 } while (to_read > 0);
         }
-        /* Perform the multi sector transfer deprotection on the buffer. */
-        if (post_read_mst_fixup((NTFS_RECORD*)trp,
+        /*
+         * Perform the multi sector transfer deprotection on the buffer if the
+         * restart page is protected.
+         */
+        if ((!ntfs_is_chkd_record(trp->magic) || le16_to_cpu(trp->usa_count))
+                        && post_read_mst_fixup((NTFS_RECORD*)trp,
                         le32_to_cpu(rp->system_page_size))) {
                 /*
                  * A multi sector tranfer error was detected.  We only need to
@@ -615,11 +630,16 @@ is_empty:
                  * Otherwise just throw it away.
                  */
                 if (rstr2_lsn > rstr1_lsn) {
+                        ntfs_debug("Using second restart page as it is more "
+                                        "recent.");
                         ntfs_free(rstr1_ph);
                         rstr1_ph = rstr2_ph;
                         /* rstr1_lsn = rstr2_lsn; */
-                } else
+                } else {
+                        ntfs_debug("Using first restart page as it is more "
+                                        "recent.");
                         ntfs_free(rstr2_ph);
+                }
                 rstr2_ph = NULL;
         }
         /* All consistency checks passed. */