comedi: ni_routing: tools: Check when the file could not be opened

- After fopen check NULL before using the file pointer use

Signed-off-by: Ruffalo Lavoisier <RuffaloLavoisier@gmail.com>
Link: https://lore.kernel.org/r/20240906203025.89588-1-RuffaloLavoisier@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/comedi/drivers/ni_routing/tools/convert_c_to_py.c b/drivers/comedi/drivers/ni_routing/tools/convert_c_to_py.c
index d55521b5bdcb2dd7373f7191a8d6a976528fe040..892a66b2cea665f4f2638085abefbcb52607a9ec 100644 (file)
--- a/drivers/comedi/drivers/ni_routing/tools/convert_c_to_py.c
+++ b/drivers/comedi/drivers/ni_routing/tools/convert_c_to_py.c
@@ -140,6 +140,11 @@ int main(void)
 {
        FILE *fp = fopen("ni_values.py", "w");
 
+       if (fp == NULL) {
+               fprintf(stderr, "Could not open file!");
+               return -1;
+       }
+
        /* write route register values */
        fprintf(fp, "ni_route_values = {\n");
        for (int i = 0; ni_all_route_values[i]; ++i)