evdev: rename EvdevCacheCompare() to EvdevCache()

Since 59056e656c64 (Remove the reopen timer logic) from last year,
EvdevCacheCompare() is only used for caching ioctl values and not for
comparing, so remove the unused compare logic and rename the function
to EvdevCache().

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 8 insertions, 59 deletions

diff --git a/src/evdev.c b/src/evdev.c
index 71882ce..f3afd31 100644
--- a/src/evdev.c
+++ b/src/evdev.c
@@ -107,7 +107,7 @@ static int proximity_bits[] = {
 };
 
 static int EvdevOn(DeviceIntPtr);
-static int EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare);
+static int EvdevCache(InputInfoPtr pInfo);
 static void EvdevKbdCtrl(DeviceIntPtr device, KeybdCtrl *ctrl);
 static int EvdevSwitchMode(ClientPtr client, DeviceIntPtr device, int mode);
 static BOOL EvdevGrabDevice(InputInfoPtr pInfo, int grab, int ungrab);
@@ -1744,14 +1744,11 @@ EvdevProc(DeviceIntPtr device, int what)
 
 /**
  * Get as much information as we can from the fd and cache it.
- * If compare is True, then the information retrieved will be compared to the
- * one already cached. If the information does not match, then this function
- * returns an error.
  *
  * @return Success if the information was cached, or !Success otherwise.
  */
 static int
-EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
+EvdevCache(InputInfoPtr pInfo)
 {
     EvdevPtr pEvdev = pInfo->private;
     int i, len;
@@ -1768,13 +1765,7 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
         goto error;
     }
 
-    if (!compare) {
-        strcpy(pEvdev->name, name);
-    } else if (strcmp(pEvdev->name, name)) {
-        xf86Msg(X_ERROR, "%s: device name changed: %s != %s\n",
-                pInfo->name, pEvdev->name, name);
-        goto error;
-    }
+    strcpy(pEvdev->name, name);
 
     len = ioctl(pInfo->fd, EVIOCGBIT(0, sizeof(bitmask)), bitmask);
     if (len < 0) {
@@ -1783,12 +1774,7 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
         goto error;
     }
 
-    if (!compare) {
-        memcpy(pEvdev->bitmask, bitmask, len);
-    } else if (memcmp(pEvdev->bitmask, bitmask, len)) {
-        xf86Msg(X_ERROR, "%s: device bitmask has changed\n", pInfo->name);
-        goto error;
-    }
+    memcpy(pEvdev->bitmask, bitmask, len);
 
     len = ioctl(pInfo->fd, EVIOCGBIT(EV_REL, sizeof(rel_bitmask)), rel_bitmask);
     if (len < 0) {
@@ -1797,12 +1783,7 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
         goto error;
     }
 
-    if (!compare) {
-        memcpy(pEvdev->rel_bitmask, rel_bitmask, len);
-    } else if (memcmp(pEvdev->rel_bitmask, rel_bitmask, len)) {
-        xf86Msg(X_ERROR, "%s: device rel_bitmask has changed\n", pInfo->name);
-        goto error;
-    }
+    memcpy(pEvdev->rel_bitmask, rel_bitmask, len);
 
     len = ioctl(pInfo->fd, EVIOCGBIT(EV_ABS, sizeof(abs_bitmask)), abs_bitmask);
     if (len < 0) {
@@ -1811,12 +1792,7 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
         goto error;
     }
 
-    if (!compare) {
-        memcpy(pEvdev->abs_bitmask, abs_bitmask, len);
-    } else if (memcmp(pEvdev->abs_bitmask, abs_bitmask, len)) {
-        xf86Msg(X_ERROR, "%s: device abs_bitmask has changed\n", pInfo->name);
-        goto error;
-    }
+    memcpy(pEvdev->abs_bitmask, abs_bitmask, len);
 
     len = ioctl(pInfo->fd, EVIOCGBIT(EV_LED, sizeof(led_bitmask)), led_bitmask);
     if (len < 0) {
@@ -1825,12 +1801,7 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
         goto error;
     }
 
-    if (!compare) {
-        memcpy(pEvdev->led_bitmask, led_bitmask, len);
-    } else if (memcmp(pEvdev->led_bitmask, led_bitmask, len)) {
-        xf86Msg(X_ERROR, "%s: device led_bitmask has changed\n", pInfo->name);
-        goto error;
-    }
+    memcpy(pEvdev->led_bitmask, led_bitmask, len);
 
     /*
      * Do not try to validate absinfo data since it is not expected
@@ -1854,27 +1825,6 @@ EvdevCacheCompare(InputInfoPtr pInfo, BOOL compare)
         goto error;
     }
 
-    if (compare) {
-        /*
-         * Keys are special as user can adjust keymap at any time (on
-         * devices that support EVIOCSKEYCODE. However we do not expect
-         * buttons reserved for mice/tablets/digitizers and so on to
-         * appear/disappear so we will check only those in
-         * [BTN_MISC, KEY_OK) range.
-         */
-        size_t start_word = BTN_MISC / LONG_BITS;
-        size_t start_byte = start_word * sizeof(unsigned long);
-        size_t end_word = KEY_OK / LONG_BITS;
-        size_t end_byte = end_word * sizeof(unsigned long);
-
-        if (len >= start_byte &&
-            memcmp(&pEvdev->key_bitmask[start_word], &key_bitmask[start_word],
-                   min(len, end_byte) - start_byte + 1)) {
-            xf86Msg(X_ERROR, "%s: device key_bitmask has changed\n", pInfo->name);
-            goto error;
-        }
-    }
-
     /* Copy the data so we have reasonably up-to-date info */
     memcpy(pEvdev->key_bitmask, key_bitmask, len);
 
@@ -2273,8 +2223,7 @@ EvdevPreInit(InputDriverPtr drv, InputInfoPtr pInfo, int flags)
 
     EvdevInitButtonMapping(pInfo);
 
-    if (EvdevCacheCompare(pInfo, FALSE) ||
-        EvdevProbe(pInfo)) {
+    if (EvdevCache(pInfo) || EvdevProbe(pInfo)) {
         rc = BadMatch;
         goto error;
     }