Merge branch 'for-rmk' of git://git.android.com/kernel into devel

1 files changed, 22 insertions, 20 deletions

diff --git a/drivers/mtd/mtdoops.c b/drivers/mtd/mtdoops.c
index 5a680e1e61f1..aebb3b27edbd 100644
--- a/drivers/mtd/mtdoops.c
+++ b/drivers/mtd/mtdoops.c
@@ -33,6 +33,7 @@
 #include <linux/interrupt.h>
 #include <linux/mtd/mtd.h>
 
+#define MTDOOPS_KERNMSG_MAGIC 0x5d005d00
 #define OOPS_PAGE_SIZE 4096
 
 static struct mtdoops_context {
@@ -99,7 +100,7 @@ static void mtdoops_inc_counter(struct mtdoops_context *cxt)
         int ret;
 
         cxt->nextpage++;
-        if (cxt->nextpage > cxt->oops_pages)
+        if (cxt->nextpage >= cxt->oops_pages)
                 cxt->nextpage = 0;
         cxt->nextcount++;
         if (cxt->nextcount == 0xffffffff)
@@ -141,7 +142,7 @@ static void mtdoops_workfunc_erase(struct work_struct *work)
         mod = (cxt->nextpage * OOPS_PAGE_SIZE) % mtd->erasesize;
         if (mod != 0) {
                 cxt->nextpage = cxt->nextpage + ((mtd->erasesize - mod) / OOPS_PAGE_SIZE);
-                if (cxt->nextpage > cxt->oops_pages)
+                if (cxt->nextpage >= cxt->oops_pages)
                         cxt->nextpage = 0;
         }
 
@@ -158,7 +159,7 @@ badblock:
                                 cxt->nextpage * OOPS_PAGE_SIZE);
                 i++;
                 cxt->nextpage = cxt->nextpage + (mtd->erasesize / OOPS_PAGE_SIZE);
-                if (cxt->nextpage > cxt->oops_pages)
+                if (cxt->nextpage >= cxt->oops_pages)
                         cxt->nextpage = 0;
                 if (i == (cxt->oops_pages / (mtd->erasesize / OOPS_PAGE_SIZE))) {
                         printk(KERN_ERR "mtdoops: All blocks bad!\n");
@@ -224,40 +225,40 @@ static void find_next_position(struct mtdoops_context *cxt)
 {
         struct mtd_info *mtd = cxt->mtd;
         int ret, page, maxpos = 0;
-        u32 count, maxcount = 0xffffffff;
+        u32 count[2], maxcount = 0xffffffff;
         size_t retlen;
 
         for (page = 0; page < cxt->oops_pages; page++) {
-                ret = mtd->read(mtd, page * OOPS_PAGE_SIZE, 4, &retlen, (u_char *) &count);
-                if ((retlen != 4) || ((ret < 0) && (ret != -EUCLEAN))) {
-                        printk(KERN_ERR "mtdoops: Read failure at %d (%td of 4 read)"
+                ret = mtd->read(mtd, page * OOPS_PAGE_SIZE, 8, &retlen, (u_char *) &count[0]);
+                if ((retlen != 8) || ((ret < 0) && (ret != -EUCLEAN))) {
+                        printk(KERN_ERR "mtdoops: Read failure at %d (%td of 8 read)"
                                 ", err %d.\n", page * OOPS_PAGE_SIZE, retlen, ret);
                         continue;
                 }
 
-                if (count == 0xffffffff)
+                if (count[1] != MTDOOPS_KERNMSG_MAGIC)
+                        continue;
+                if (count[0] == 0xffffffff)
                         continue;
                 if (maxcount == 0xffffffff) {
-                        maxcount = count;
+                        maxcount = count[0];
                         maxpos = page;
-                } else if ((count < 0x40000000) && (maxcount > 0xc0000000)) {
-                        maxcount = count;
+                } else if ((count[0] < 0x40000000) && (maxcount > 0xc0000000)) {
+                        maxcount = count[0];
                         maxpos = page;
-                } else if ((count > maxcount) && (count < 0xc0000000)) {
-                        maxcount = count;
+                } else if ((count[0] > maxcount) && (count[0] < 0xc0000000)) {
+                        maxcount = count[0];
                         maxpos = page;
-                } else if ((count > maxcount) && (count > 0xc0000000)
+                } else if ((count[0] > maxcount) && (count[0] > 0xc0000000)
                                         && (maxcount > 0x80000000)) {
-                        maxcount = count;
+                        maxcount = count[0];
                         maxpos = page;
                 }
         }
         if (maxcount == 0xffffffff) {
                 cxt->nextpage = 0;
                 cxt->nextcount = 1;
-                cxt->ready = 1;
-                printk(KERN_DEBUG "mtdoops: Ready %d, %d (first init)\n",
-                                cxt->nextpage, cxt->nextcount);
+                schedule_work(&cxt->work_erase);
                 return;
         }
 
@@ -358,8 +359,9 @@ mtdoops_console_write(struct console *co, const char *s, unsigned int count)
 
         if (cxt->writecount == 0) {
                 u32 *stamp = cxt->oops_buf;
-                *stamp = cxt->nextcount;
-                cxt->writecount = 4;
+                *stamp++ = cxt->nextcount;
+                *stamp = MTDOOPS_KERNMSG_MAGIC;
+                cxt->writecount = 8;
         }
 
         if ((count + cxt->writecount) > OOPS_PAGE_SIZE)