From: Jeff LaBundy jeff@labundy.com
[ Upstream commit 404f3b48e65f058d94429e4a1ec16a1f82ff3b2f ]
Nonzero return values of several calls to fwnode_property_read_u32() are silently ignored, leaving no way to know the properties were not applied in the event of an error.
Solve this problem by evaluating fwnode_property_read_u32()'s return value, and reporting an error for any nonzero return value not equal to -EINVAL which indicates the property was absent altogether.
Fixes: e505edaedcb9 ("Input: add support for Azoteq IQS7222A/B/C") Signed-off-by: Jeff LaBundy jeff@labundy.com Reviewed-by: Mattijs Korpershoek mkorpershoek@baylibre.com Link: https://lore.kernel.org/r/Y1SRRrpQXvkETjfm@nixie71 Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Stable-dep-of: 2f6fd2329789 ("Input: iqs7222 - protect against undefined slider size") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/misc/iqs7222.c | 44 +++++++++++++++++++++++++++++------- 1 file changed, 36 insertions(+), 8 deletions(-)
diff --git a/drivers/input/misc/iqs7222.c b/drivers/input/misc/iqs7222.c index 3b6e84689879..350be4f23f50 100644 --- a/drivers/input/misc/iqs7222.c +++ b/drivers/input/misc/iqs7222.c @@ -1807,8 +1807,9 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, chan_setup[0] |= IQS7222_CHAN_SETUP_0_REF_MODE_FOLLOW; chan_setup[4] = val * 42 + 1048;
- if (!fwnode_property_read_u32(chan_node, "azoteq,ref-weight", - &val)) { + error = fwnode_property_read_u32(chan_node, "azoteq,ref-weight", + &val); + if (!error) { if (val > U16_MAX) { dev_err(&client->dev, "Invalid %s reference weight: %u\n", @@ -1817,6 +1818,11 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, }
chan_setup[5] = val; + } else if (error != -EINVAL) { + dev_err(&client->dev, + "Failed to read %s reference weight: %d\n", + fwnode_get_name(chan_node), error); + return error; }
/* @@ -1889,9 +1895,10 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222, if (!event_node) continue;
- if (!fwnode_property_read_u32(event_node, - "azoteq,timeout-press-ms", - &val)) { + error = fwnode_property_read_u32(event_node, + "azoteq,timeout-press-ms", + &val); + if (!error) { /* * The IQS7222B employs a global pair of press timeout * registers as opposed to channel-specific registers. @@ -1911,6 +1918,12 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222,
*setup &= ~(U8_MAX << i * 8); *setup |= (val / 500 << i * 8); + } else if (error != -EINVAL) { + dev_err(&client->dev, + "Failed to read %s press timeout: %d\n", + fwnode_get_name(event_node), error); + fwnode_handle_put(event_node); + return error; }
error = iqs7222_parse_event(iqs7222, event_node, chan_index, @@ -2009,7 +2022,8 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222, if (fwnode_property_present(sldr_node, "azoteq,use-prox")) sldr_setup[4 + reg_offset] -= 2;
- if (!fwnode_property_read_u32(sldr_node, "azoteq,slider-size", &val)) { + error = fwnode_property_read_u32(sldr_node, "azoteq,slider-size", &val); + if (!error) { if (!val || val > dev_desc->sldr_res) { dev_err(&client->dev, "Invalid %s size: %u\n", fwnode_get_name(sldr_node), val); @@ -2023,9 +2037,14 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222, sldr_setup[2] |= (val / 16 << IQS7222_SLDR_SETUP_2_RES_SHIFT); } + } else if (error != -EINVAL) { + dev_err(&client->dev, "Failed to read %s size: %d\n", + fwnode_get_name(sldr_node), error); + return error; }
- if (!fwnode_property_read_u32(sldr_node, "azoteq,top-speed", &val)) { + error = fwnode_property_read_u32(sldr_node, "azoteq,top-speed", &val); + if (!error) { if (val > (reg_offset ? U16_MAX : U8_MAX * 4)) { dev_err(&client->dev, "Invalid %s top speed: %u\n", fwnode_get_name(sldr_node), val); @@ -2038,9 +2057,14 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222, sldr_setup[2] &= ~IQS7222_SLDR_SETUP_2_TOP_SPEED_MASK; sldr_setup[2] |= (val / 4); } + } else if (error != -EINVAL) { + dev_err(&client->dev, "Failed to read %s top speed: %d\n", + fwnode_get_name(sldr_node), error); + return error; }
- if (!fwnode_property_read_u32(sldr_node, "linux,axis", &val)) { + error = fwnode_property_read_u32(sldr_node, "linux,axis", &val); + if (!error) { u16 sldr_max = sldr_setup[3] - 1;
if (!reg_offset) { @@ -2054,6 +2078,10 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222,
input_set_abs_params(iqs7222->keypad, val, 0, sldr_max, 0, 0); iqs7222->sl_axis[sldr_index] = val; + } else if (error != -EINVAL) { + dev_err(&client->dev, "Failed to read %s axis: %d\n", + fwnode_get_name(sldr_node), error); + return error; }
if (dev_desc->wheel_enable) {