cy8mrln-palmpre: read for the null values until we get some

diff --git a/plugins/cy8mrln-palmpre.c b/plugins/cy8mrln-palmpre.c
index 97808b8..cf93736 100644 (file)
--- a/plugins/cy8mrln-palmpre.c
+++ b/plugins/cy8mrln-palmpre.c
@@ -36,8 +36,6 @@
 #define H_FIELDS       7
 #define V_FIELDS       11
 
-#define DEBUG
-
 #define container_of(ptr, type, member) ({ \
        const typeof( ((type*)0)->member ) *__mptr = (ptr); \
        (type *)( (char *)__mptr - offsetof(type, member)); })
@@ -392,6 +390,7 @@ TSAPI struct tslib_module_info *cy8mrln_palmpre_mod_init(struct tsdev *dev, cons
 {
        struct tslib_cy8mrln_palmpre *info;
        struct cy8mrln_palmpre_input input;
+       int ret = 0;
        
        info = malloc(sizeof(struct tslib_cy8mrln_palmpre));
        if(info == NULL)
@@ -410,9 +409,12 @@ TSAPI struct tslib_module_info *cy8mrln_palmpre_mod_init(struct tsdev *dev, cons
                return NULL;
        }
 
-       // FIXME why do we read here one packet from fd?
-       read(dev->fd, &input, sizeof(input));
-
+       /* We need the intial values the touchscreen repots with no touch input force
+        * later use */
+       do {
+               ret = read(dev->fd, &input, sizeof(input));
+       }
+       while (ret <= 0);
        memcpy(info->nulls, input.field, H_FIELDS * V_FIELDS * sizeof(uint16_t));
 
        return &(info->module);