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cmd: mdio: prevent data abort when no mdio bus is found

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Calling 'mdio read ...' currently leads to a data abort when no mdio
bus is found.

To fix this, check if 'bus' is a valid pointer before accessing it.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Tested-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Simon Goldschmidt 2019-07-12 20:58:18 +02:00 • committed by Joe Hershberger
parent c3d9f3f899
commit cb58d18beb
1 changed files with 5 additions and 0 deletions
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5
cmd/mdio.c
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@ -268,6 +268,11 @@ static int do_mdio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
break; break;
} }
if (!bus) {
puts("No MDIO bus found\n");
return CMD_RET_FAILURE;
}
if (op[0] == 'l') { if (op[0] == 'l') {
mdio_list_devices(); mdio_list_devices();