lkml.org 
[lkml]   [2022]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v3 18/23] platform/chrome: cros_ec_proto: check `msg->result` in getting cmd mask
On Wed, Jun 8, 2022 at 9:23 AM Guenter Roeck <groeck@google.com> wrote:
>
> On Wed, Jun 8, 2022 at 4:08 AM Tzung-Bi Shih <tzungbi@kernel.org> wrote:
> >
> > cros_ec_get_host_command_version_mask() should check if EC wasn't happy
> > by checking `msg->result`.
> >
> > Use cros_ec_map_error() and return the error code if any.
> >
> > Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
> > ---
> > No v2. New and separated from the original series.
> >
> > drivers/platform/chrome/cros_ec_proto.c | 21 +++++++++++++--------
> > 1 file changed, 13 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
> > index 06bc7db1213e..6a5771361383 100644
> > --- a/drivers/platform/chrome/cros_ec_proto.c
> > +++ b/drivers/platform/chrome/cros_ec_proto.c
> > @@ -428,13 +428,12 @@ static int cros_ec_get_proto_info_legacy(struct cros_ec_device *ec_dev)
> > * the caller has ec_dev->lock mutex or the caller knows there is
> > * no other command in progress.
> > */
> > -static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev,
> > - u16 cmd, u32 *mask)
> > +static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev, u16 cmd, u32 *mask)
> > {
> > struct ec_params_get_cmd_versions *pver;
> > struct ec_response_get_cmd_versions *rver;
> > struct cros_ec_command *msg;
> > - int ret;
> > + int ret, mapped;
> >
> > msg = kmalloc(sizeof(*msg) + max(sizeof(*rver), sizeof(*pver)),
> > GFP_KERNEL);
> > @@ -450,14 +449,20 @@ static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev,
> > pver->cmd = cmd;
> >
> > ret = send_command(ec_dev, msg);
> > - if (ret > 0) {
> > - rver = (struct ec_response_get_cmd_versions *)msg->data;
> > - *mask = rver->version_mask;
> > - ret = 0;
> > + if (ret < 0)
> > + goto exit;
> > +
> > + mapped = cros_ec_map_error(msg->result);
> > + if (mapped) {
> > + ret = mapped;
> > + goto exit;
> > }
> >
> What if ret == 0 ? Is that valid ?
>

Never mind, addressed in a follow-up patch.

Reviewed-by: Guenter Roeck <groeck@chromium.org>

> Thanks,
> Guenter
>
> > + rver = (struct ec_response_get_cmd_versions *)msg->data;
> > + *mask = rver->version_mask;
> > + ret = 0;
> > +exit:
> > kfree(msg);
> > -
> > return ret;
> > }
> >
> > --
> > 2.36.1.255.ge46751e96f-goog
> >

\
 
 \ /
  Last update: 2022-06-08 18:34    [W:0.065 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site