cmd: clk: Check return value from soc_clk_dump

In case of error in soc_clk_dump function are returned different values
then CMD return values (-1, 0, 1).

For example:
ZynqMP> clk dump
exit not allowed from main input shel

The patch is checking all negative return values and return
CMD_RET_FAILURE which is proper reaction for these cases.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/cmd/clk.c b/cmd/clk.c
index 6d3d46a..52b2540 100644 (file)
--- a/cmd/clk.c
+++ b/cmd/clk.c
@@ -16,7 +16,15 @@ int __weak soc_clk_dump(void)
 static int do_clk_dump(cmd_tbl_t *cmdtp, int flag, int argc,
                       char *const argv[])
 {
-       return soc_clk_dump();
+       int ret;
+
+       ret = soc_clk_dump();
+       if (ret < 0) {
+               printf("Clock dump error %d\n", ret);
+               ret = CMD_RET_FAILURE;
+       }
+
+       return ret;
 }
 
 static cmd_tbl_t cmd_clk_sub[] = {