From 497f6926d880c57f65bf7c3f1086526fa774c55e Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 1 Nov 2017 16:36:44 +0100 Subject: [PATCH] ext4: Simplify error handling in ext4_dax_huge_fault() If transaction starting fails, just bail out of the function immediately instead of checking for that condition throughout the function. Reviewed-by: Ross Zwisler Signed-off-by: Jan Kara Signed-off-by: Dan Williams --- fs/ext4/file.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 3cec0b95672f..208adfc3e673 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -302,16 +302,17 @@ static int ext4_dax_huge_fault(struct vm_fault *vmf, down_read(&EXT4_I(inode)->i_mmap_sem); handle = ext4_journal_start_sb(sb, EXT4_HT_WRITE_PAGE, EXT4_DATA_TRANS_BLOCKS(sb)); + if (IS_ERR(handle)) { + up_read(&EXT4_I(inode)->i_mmap_sem); + sb_end_pagefault(sb); + return VM_FAULT_SIGBUS; + } } else { down_read(&EXT4_I(inode)->i_mmap_sem); } - if (!IS_ERR(handle)) - result = dax_iomap_fault(vmf, pe_size, NULL, &ext4_iomap_ops); - else - result = VM_FAULT_SIGBUS; + result = dax_iomap_fault(vmf, pe_size, NULL, &ext4_iomap_ops); if (write) { - if (!IS_ERR(handle)) - ext4_journal_stop(handle); + ext4_journal_stop(handle); up_read(&EXT4_I(inode)->i_mmap_sem); sb_end_pagefault(sb); } else { -- 2.11.0