staging: atomisp: off by one in atomisp_acc_load_extensions()

We should be doing i-- on all error paths but we don't if the loop
finishes successfully.  I've re-arranged this so that we don't read
beyond the end of acc_flag_to_pipe[] array.

Fixes: a49d25364dfb ("staging/atomisp: Add support for the Intel IPU v2")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/media/atomisp/pci/atomisp2/atomisp_acc.c b/drivers/staging/media/atomisp/pci/atomisp2/atomisp_acc.c
index 4c35a78..212e0a7 100644 (file)
--- a/drivers/staging/media/atomisp/pci/atomisp2/atomisp_acc.c
+++ b/drivers/staging/media/atomisp/pci/atomisp2/atomisp_acc.c
@@ -472,10 +472,8 @@ int atomisp_acc_load_extensions(struct atomisp_sub_device *asd)
                                        acc_fw->fw,
                                        acc_flag_to_pipe[i].pipe_id,
                                        acc_fw->type);
-                               if (ret) {
-                                       i--;
+                               if (ret)
                                        goto error;
-                               }
 
                                ext_loaded = true;
                        }
@@ -499,7 +497,7 @@ int atomisp_acc_load_extensions(struct atomisp_sub_device *asd)
        return 0;
 
 error:
-       for (; i >= 0; i--) {
+       while (--i >= 0) {
                if (acc_fw->flags & acc_flag_to_pipe[i].flag) {
                        atomisp_css_unload_acc_extension(asd, acc_fw->fw,
                                        acc_flag_to_pipe[i].pipe_id);