The `file_path` of `strchr(file_path, '/')` is a `const char *`. In this
case the `strchr()` in debian experimental returns a `const char *`,
leading to this error message:
```
mcp251xfd/mcp251xfd-regmap.c:75:13: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
75 | tmp = strchr(file_path, '/');
| ^
```
Fix the error by using the return value from `strchr()` directly in the
`if()`.
Link: https://github.com/linux-can/can-utils/actions/runs/22649777324/job/65679726209?pr=619
Fix the following compiler warning:
| mcp251xfd/mcp251xfd-regmap.c:38:4: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
| fscanf(reg_file, "%*[^\n]\n");
| ^~~~~~ ~~~~~~~~~~~~~~~~~~~~~
Reported-by: https://github.com/Chaitanya84
Link: https://github.com/linux-can/can-utils/pull/506
It works on dev coredump data generated by the mcp251xfd driver in
case of failures, as well as on regmap based register dumps.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Marc Kleine-Budde