From 09dc28acaec74d7467c7c9b81dc8676e5bc957ce Mon Sep 17 00:00:00 2001
From: Jason Gerecke <killertofu@gmail.com>
Date: Mon, 24 Jul 2017 09:46:19 -0700
Subject: [PATCH] HID: wacom: Improve generic name generation
The 'wacom_update_name' function is responsible for producing names for
the input device nodes based on the hardware device name. Commit f2209d4
added the ability to strip off prefixes like "Wacom Co.,Ltd." where the
prefix was immediately (and redundantly) followed by "Wacom". The
2nd-generation Intuos Pro 2 has such a prefix, but with a small error
(the period and comma are swapped) that prevents the existing code from
matching it. We're loath to extend the number of cases out endlessly and
so instead try to be smarter about name generation.
We observe that the cause of the redundant prefixes is HID combining the
manufacturer and product strings of USB devices together. By using the
original product name (with "Wacom" prefixed, if it does not already
exist in the string) we can bypass the gyrations to find and remove
redundant prefixes. Other devices either don't have a manufacturer string
that needs to be removed (Bluetooth, uhid) or should have their name
generated from scratch (I2C).
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Acked-By: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
drivers/hid/wacom_sys.c | 58 +++++++++++++++++++----------------------
1 file changed, 27 insertions(+), 31 deletions(-)
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index ae2408d5e53d3..e82a696a1d07c 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -2025,41 +2025,37 @@ static void wacom_update_name(struct wacom *wacom, const char *suffix)
/* Generic devices name unspecified */
if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
- if (strstr(wacom->hdev->name, "Wacom") ||
- strstr(wacom->hdev->name, "wacom") ||
- strstr(wacom->hdev->name, "WACOM")) {
- /* name is in HID descriptor, use it */
- strlcpy(name, wacom->hdev->name, sizeof(name));
-
- /* strip out excess whitespaces */
- while (1) {
- char *gap = strstr(name, " ");
- if (gap == NULL)
- break;
- /* shift everything including the terminator */
- memmove(gap, gap+1, strlen(gap));
- }
+ char *product_name = wacom->hdev->name;
- /* strip off excessive prefixing */
- if (strstr(name, "Wacom Co.,Ltd. Wacom ") == name) {
- int n = strlen(name);
- int x = strlen("Wacom Co.,Ltd. ");
- memmove(name, name+x, n-x+1);
- }
- if (strstr(name, "Wacom Co., Ltd. Wacom ") == name) {
- int n = strlen(name);
- int x = strlen("Wacom Co., Ltd. ");
- memmove(name, name+x, n-x+1);
- }
+ if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
+ struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
+ struct usb_device *dev = interface_to_usbdev(intf);
+ product_name = dev->product;
+ }
- /* get rid of trailing whitespace */
- if (name[strlen(name)-1] == ' ')
- name[strlen(name)-1] = '\0';
+ if (wacom->hdev->bus == BUS_I2C) {
+ snprintf(name, sizeof(name), "%s %X",
+ features->name, wacom->hdev->product);
+ } else if (strstr(product_name, "Wacom") ||
+ strstr(product_name, "wacom") ||
+ strstr(product_name, "WACOM")) {
+ strlcpy(name, product_name, sizeof(name));
} else {
- /* no meaningful name retrieved. use product ID */
- snprintf(name, sizeof(name),
- "%s %X", features->name, wacom->hdev->product);
+ snprintf(name, sizeof(name), "Wacom %s", product_name);
}
+
+ /* strip out excess whitespaces */
+ while (1) {
+ char *gap = strstr(name, " ");
+ if (gap == NULL)
+ break;
+ /* shift everything including the terminator */
+ memmove(gap, gap+1, strlen(gap));
+ }
+
+ /* get rid of trailing whitespace */
+ if (name[strlen(name)-1] == ' ')
+ name[strlen(name)-1] = '\0';
} else {
strlcpy(name, features->name, sizeof(name));
}
--
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