seq_tab_next() should increase position index

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / fs / buffer.c

diff --git a/fs/buffer.c b/fs/buffer.c
index 4f4cd95..f278e27 100644 (file)
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2298,7 +2298,7 @@ static int cont_expand_zero(struct file *file, struct address_space *mapping,
                            loff_t pos, loff_t *bytes)
 {
        struct inode *inode = mapping->host;
-       unsigned blocksize = 1 << inode->i_blkbits;
+       unsigned int blocksize = i_blocksize(inode);
        struct page *page;
        void *fsdata;
        pgoff_t index, curidx;
@@ -2378,8 +2378,8 @@ int cont_write_begin(struct file *file, struct address_space *mapping,
                        get_block_t *get_block, loff_t *bytes)
 {
        struct inode *inode = mapping->host;
-       unsigned blocksize = 1 << inode->i_blkbits;
-       unsigned zerofrom;
+       unsigned int blocksize = i_blocksize(inode);
+       unsigned int zerofrom;
        int err;
 
        err = cont_expand_zero(file, mapping, pos, bytes);
@@ -2741,7 +2741,7 @@ int nobh_truncate_page(struct address_space *mapping,
        struct buffer_head map_bh;
        int err;
 
-       blocksize = 1 << inode->i_blkbits;
+       blocksize = i_blocksize(inode);
        length = offset & (blocksize - 1);
 
        /* Block boundary? Nothing to do */
@@ -2819,7 +2819,7 @@ int block_truncate_page(struct address_space *mapping,
        struct buffer_head *bh;
        int err;
 
-       blocksize = 1 << inode->i_blkbits;
+       blocksize = i_blocksize(inode);
        length = offset & (blocksize - 1);
 
        /* Block boundary? Nothing to do */
@@ -2931,7 +2931,7 @@ sector_t generic_block_bmap(struct address_space *mapping, sector_t block,
        struct inode *inode = mapping->host;
        tmp.b_state = 0;
        tmp.b_blocknr = 0;
-       tmp.b_size = 1 << inode->i_blkbits;
+       tmp.b_size = i_blocksize(inode);
        get_block(inode, block, &tmp, 0);
        return tmp.b_blocknr;
 }
@@ -2985,6 +2985,13 @@ void guard_bio_eod(int rw, struct bio *bio)
        /* Uhhuh. We've got a bio that straddles the device size! */
        truncated_bytes = bio->bi_iter.bi_size - (maxsector << 9);
 
+       /*
+        * The bio contains more than one segment which spans EOD, just return
+        * and let IO layer turn it into an EIO
+        */
+       if (truncated_bytes > bvec->bv_len)
+               return;
+
        /* Truncate the bio.. */
        bio->bi_iter.bi_size -= truncated_bytes;
        bvec->bv_len -= truncated_bytes;