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usb: chipidea: host: more enhancement when ci->hcd is NULL 

Like http://marc.info/?l=linux-usb&m=138200449428874&w=2 said:
two more things are needed to be done:

- If host_start fails, the host_stop should not be called, so we
add check that ci->hcd is not NULL.
- if the host_start fails at the beginning, we need to consider
regulator mismatch issue.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen 2013-10-22 11:13:41 +08:00 committed by Greg Kroah-Hartman
parent e55f7cd246
commit df101c531e
1 changed files with 3 additions and 3 deletions
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6
drivers/usb/chipidea/host.c
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@ -103,15 +103,15 @@ static void host_stop(struct ci_hdrc *ci)
if (hcd) { if (hcd) {
usb_remove_hcd(hcd); usb_remove_hcd(hcd);
usb_put_hcd(hcd); usb_put_hcd(hcd);
if (ci->platdata->reg_vbus)
regulator_disable(ci->platdata->reg_vbus);
} }
if (ci->platdata->reg_vbus)
regulator_disable(ci->platdata->reg_vbus);
} }
void ci_hdrc_host_destroy(struct ci_hdrc *ci) void ci_hdrc_host_destroy(struct ci_hdrc *ci)
{ {
if (ci->role == CI_ROLE_HOST) if (ci->role == CI_ROLE_HOST && ci->hcd)
host_stop(ci); host_stop(ci);
} }