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| author | Peter Hurley <peter@hurleysoftware.com> | 2015-03-09 23:27:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-26 19:25:27 +0300 |
| commit | 60846880384f00713c7f54243f749c1923e6c0e3 (patch) | |
| tree | ddc81cce43db0e3b4836d1b52d5d825d116a22aa /drivers | |
| parent | 526ebc3f56491fe971cd2b51cfc859a879e11e93 (diff) | |
| download | linux-60846880384f00713c7f54243f749c1923e6c0e3.tar.xz | |
serial: earlycon: Skip parse_options() if empty string
Earlycon param strings of the form
earlycon=<name>
are rejected from parse_options() with an error (which, in turn,
results in a NULL argument for the setup() method options parameter).
Only pass non-empty string to parse_options(); this will enable
handling actual parse errors differently than expected and allow
formats.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/earlycon.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c index da5e8c8c4ad4..025ea0140896 100644 --- a/drivers/tty/serial/earlycon.c +++ b/drivers/tty/serial/earlycon.c @@ -109,13 +109,16 @@ int __init setup_earlycon(char *buf, const char *match, len = strlen(match); if (strncmp(buf, match, len)) return 0; - if (buf[len] && (buf[len] != ',')) - return 0; - buf += len + 1; + if (buf[len]) { + if (buf[len] != ',') + return 0; + buf += len + 1; + } else + buf = NULL; /* On parsing error, pass the options buf to the setup function */ - if (!parse_options(&early_console_dev, buf)) + if (buf && !parse_options(&early_console_dev, buf)) buf = NULL; port->uartclk = BASE_BAUD * 16; |