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Input: iqs269a - drop unused device node references

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[ Upstream commit 59bc9cb3b80abaa42643abede0d5db8477901d9c ]

Each call to device/fwnode_get_named_child_node() must be matched
with a call to fwnode_handle_put() once the corresponding node is
no longer in use. This ensures a reference count remains balanced
in the case of dynamic device tree support.

Currently, the driver does not call fwnode_handle_put() on nested
event nodes. This patch solves this problem by adding the missing
instances of fwnode_handle_put().

As part of this change, the logic which parses each channel's key
code is gently refactored in order to reduce the number of places
from which fwnode_handle_put() is called.

Fixes: 04e49867fa ("Input: add support for Azoteq IQS269A")
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/Y7Rsx68k/gvDVXAt@nixie71
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jeff LaBundy
2023-01-03 11:58:31 -06:00
committed by Greg Kroah-Hartman
parent b7fb5b5d2c
commit a6a70ab2bb
1 changed files with 11 additions and 1 deletions
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12
drivers/input/misc/iqs269a.c
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@@ -694,6 +694,7 @@ static int iqs269_parse_chan(struct iqs269_private *iqs269,
dev_err(&client->dev, dev_err(&client->dev,
"Invalid channel %u threshold: %u\n", "Invalid channel %u threshold: %u\n",
reg, val); reg, val);
fwnode_handle_put(ev_node);
return -EINVAL; return -EINVAL;
} }
@@ -707,6 +708,7 @@ static int iqs269_parse_chan(struct iqs269_private *iqs269,
dev_err(&client->dev, dev_err(&client->dev,
"Invalid channel %u hysteresis: %u\n", "Invalid channel %u hysteresis: %u\n",
reg, val); reg, val);
fwnode_handle_put(ev_node);
return -EINVAL; return -EINVAL;
} }
@@ -721,8 +723,16 @@ static int iqs269_parse_chan(struct iqs269_private *iqs269,
} }
} }
if (fwnode_property_read_u32(ev_node, "linux,code", &val)) error = fwnode_property_read_u32(ev_node, "linux,code", &val);
fwnode_handle_put(ev_node);
if (error == -EINVAL) {
continue; continue;
} else if (error) {
dev_err(&client->dev,
"Failed to read channel %u code: %d\n", reg,
error);
return error;
}
switch (reg) { switch (reg) {
case IQS269_CHx_HALL_ACTIVE: case IQS269_CHx_HALL_ACTIVE: