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Subject[PATCH 2/4] HID: input: do not append a suffix if the name already has it
Date
Or it creates some weird input names like:
"MI Dongle MI Wireless Mouse Mouse"

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
---
drivers/hid/hid-input.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index ac201817a2dd..1e9ba8f7a16b 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1516,6 +1516,7 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid,
struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
struct input_dev *input_dev = input_allocate_device();
const char *suffix = NULL;
+ size_t suffix_len, name_len;

if (!hidinput || !input_dev)
goto fail;
@@ -1559,10 +1560,15 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid,
}

if (suffix) {
- hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
- hid->name, suffix);
- if (!hidinput->name)
- goto fail;
+ name_len = strlen(hid->name);
+ suffix_len = strlen(suffix);
+ if ((name_len < suffix_len) ||
+ strcmp(hid->name + name_len - suffix_len, suffix)) {
+ hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
+ hid->name, suffix);
+ if (!hidinput->name)
+ goto fail;
+ }
}

input_set_drvdata(input_dev, hid);
--
2.14.3
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