On 8/21/20 1:21 AM, Enric Balletbo i Serra wrote: > Hi Guenter et all, > > On 6/8/20 17:33, Guenter Roeck wrote: >> The EC reports a variety of error codes. Most of those, with the exception >> of EC_RES_INVALID_VERSION, are converted to -EPROTO. As result, the actual >> error code gets lost. In cros_ec_cmd_xfer_status(), convert all EC errors >> to Linux error codes to report a more meaningful error to the caller to aid >> debugging. >> >> To prepare for this change, handle error codes other than -EPROTO for all >> callers of cros_ec_cmd_xfer_status(). Specifically, no longer assume that >> -EPROTO reflects an error from the EC and all other error codes reflect a >> transfer error. >> >> v2: Add patches 1/4 to 3/4 to handle callers of cros_ec_cmd_xfer_status() >> v3: Add patches 4/6 and 5/6 to handle additional callers of >> cros_ec_cmd_xfer_status() >> Use -ENOPROTOOPT for EC_RES_INVALID_VERSION >> Implement function to convert error codes >> v4: Add coments describing the functionality of cros_ec_num_pwms(). >> Add patch 7/7 to clean up cros_ec_num_pwms() after the new error code >> support has been implemented. >> Rebased series to v5.8. >> >> ---------------------------------------------------------------- >> Guenter Roeck (7): >> iio: cros_ec: Accept -EOPNOTSUPP as 'not supported' error code >> cros_ec_lightbar: Accept more error codes from cros_ec_cmd_xfer_status >> platform/chrome: cros_ec_sysfs: Report range of error codes from EC >> pwm: cros-ec: Accept more error codes from cros_ec_cmd_xfer_status >> platform/input: cros_ec: Replace -ENOTSUPP with -ENOPROTOOPT >> platform/chrome: cros_ec_proto: Convert EC error codes to Linux error codes >> pwm: cros-ec: Simplify EC error handling >> >> .../iio/common/cros_ec_sensors/cros_ec_sensors.c | 2 +- >> drivers/input/keyboard/cros_ec_keyb.c | 2 +- >> drivers/platform/chrome/cros_ec_lightbar.c | 10 ++--- >> drivers/platform/chrome/cros_ec_proto.c | 52 +++++++++++++++++----- >> drivers/platform/chrome/cros_ec_sysfs.c | 24 ++++------ >> drivers/pwm/pwm-cros-ec.c | 37 +++++++-------- >> 6 files changed, 74 insertions(+), 53 deletions(-) >> > > The patches LGTM, and if the other maintainers are fine, I'd like to queue all > these through the chrome-platform tree. > > I noticed, thought, that KernelCI reported a regression on Kevin that I'll try > to debug at the beginning of next week. > > [ 3.821203] cros-ec-spi spi2.0: Wrong size 1/3: 0 != 4 > [ 3.827320] cros-ec-keyb ff200000.spi:ec@0:keyboard-controller: cannot > register non-matrix inputs: -71 > [ 3.838506] cros-ec-keyb: probe of ff200000.spi:ec@0:keyboard-controller > failed with error -71 > [ 3.853492] cros-ec-spi spi2.0: Chrome EC device registered > Easy to debug. cros_ec_cmd_xfer_status() now returns 0 for success and < 0 for errors. It needs to return the receive length if there is no error. I'll send v5 with a fix, and sorry for the trouble. Thanks, Guenter
