Trouble in making an commit .

Santhosh Pai santhosh.pai88 at
Tue Jun 16 14:36:27 EDT 2015

Hello Team,
I'm trying to make a commit to a checkpatch fix , and i have followed the instructions in the first patch tutorial but i'm not able to commit .
Following were the steps done .
1)Made changes to the file 

2)Run git diff command got the below output 

diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 146ab00..02a41bc 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -2611,7 +2611,7 @@ static int comedi_open(struct inode *inode, struct file *file)
        if (dev->attached && dev->use_count == 0) {
                if (!try_module_get(dev->driver->module)) {
-                       rc = -ENOSYS;
+                       rc = -ENODATA;
                        goto out;
                if (dev->open) {
3) when i run git commit -a  i get the below message and the same goes for git commit -s -v 

bash-4.2$ git commit -a
usage: git diff-index [-m] [--cached] [<common diff options>] <tree-ish> [<path>...]
common diff options:
  -z            output diff-raw with lines terminated with NUL.
  -p            output patch format.
  -u            synonym for -p.
                output both a patch and the diff-raw format.
  --stat        show diffstat instead of patch.
  --numstat     show numeric diffstat instead of patch.
                output a patch and prepend its diffstat.
  --name-only   show only names of changed files.
  --name-status show names and status of changed files.
  --full-index  show full object name on index lines.
  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.
  -R            swap input file pairs.
  -B            detect complete rewrites.
  -M            detect renames.
  -C            detect copies.
                try unchanged files as candidate for copy detection.
  -l<n>         limit rename attempts up to <n> paths.
  -O<file>      reorder diffs according to the <file>.
  -S<string>    find filepair whose only one side contains the string.
                show all files diff when -S is used and hit is found.
  -a  --text    treat all files as text.

i'm not able to commit the changes ,let us know what could be the problem . Below is the details of the git version 

git version : Fedora 

Santosh Pai
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