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greybus: hd: fix cport-count check 

Fix off-by-one error when checking the number of cports a host-device
supports.

The CPORT_ID_MAX is the largest valid cport id so the maximum number of
cports a host-device can use is CPORT_ID_MAX + 1.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2015-11-22 10:12:58 +01:00 committed by Greg Kroah-Hartman
parent 39f36c8f9f
commit bfe2c99c1c
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/greybus/hd.c
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@ -49,7 +49,7 @@ struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver,
return ERR_PTR(-EINVAL);
}
if (num_cports == 0 || num_cports > CPORT_ID_MAX) {
if (num_cports == 0 || num_cports > CPORT_ID_MAX + 1) {
dev_err(parent, "Invalid number of CPorts: %zu\n", num_cports);
return ERR_PTR(-EINVAL);
}