[PATCH] INPUT: add MODALIAS to the event environment
input: add MODALIAS to the event environment
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/input/input.c b/drivers/input/input.c
index fe33ff3..4fe3da3 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -528,40 +528,56 @@
INPUT_DEV_STRING_ATTR_SHOW(phys);
INPUT_DEV_STRING_ATTR_SHOW(uniq);
-static int print_modalias_bits(char *buf, char prefix, unsigned long *arr,
+static int print_modalias_bits(char *buf, int size, char prefix, unsigned long *arr,
unsigned int min, unsigned int max)
{
int len, i;
- len = sprintf(buf, "%c", prefix);
+ len = snprintf(buf, size, "%c", prefix);
for (i = min; i < max; i++)
if (arr[LONG(i)] & BIT(i))
- len += sprintf(buf+len, "%X,", i);
+ len += snprintf(buf + len, size - len, "%X,", i);
+ return len;
+}
+
+static int print_modalias(char *buf, int size, struct input_dev *id)
+{
+ int len;
+
+ len = snprintf(buf, size, "input:b%04Xv%04Xp%04Xe%04X-",
+ id->id.bustype,
+ id->id.vendor,
+ id->id.product,
+ id->id.version);
+
+ len += print_modalias_bits(buf + len, size - len, 'e', id->evbit,
+ 0, EV_MAX);
+ len += print_modalias_bits(buf + len, size - len, 'k', id->keybit,
+ KEY_MIN_INTERESTING, KEY_MAX);
+ len += print_modalias_bits(buf + len, size - len, 'r', id->relbit,
+ 0, REL_MAX);
+ len += print_modalias_bits(buf + len, size - len, 'a', id->absbit,
+ 0, ABS_MAX);
+ len += print_modalias_bits(buf + len, size - len, 'm', id->mscbit,
+ 0, MSC_MAX);
+ len += print_modalias_bits(buf + len, size - len, 'l', id->ledbit,
+ 0, LED_MAX);
+ len += print_modalias_bits(buf + len, size - len, 's', id->sndbit,
+ 0, SND_MAX);
+ len += print_modalias_bits(buf + len, size - len, 'f', id->ffbit,
+ 0, FF_MAX);
+ len += print_modalias_bits(buf + len, size - len, 'w', id->swbit,
+ 0, SW_MAX);
return len;
}
static ssize_t input_dev_show_modalias(struct class_device *dev, char *buf)
{
struct input_dev *id = to_input_dev(dev);
- ssize_t len = 0;
+ ssize_t len;
- len += sprintf(buf+len, "input:b%04Xv%04Xp%04Xe%04X-",
- id->id.bustype,
- id->id.vendor,
- id->id.product,
- id->id.version);
-
- len += print_modalias_bits(buf+len, 'e', id->evbit, 0, EV_MAX);
- len += print_modalias_bits(buf+len, 'k', id->keybit,
- KEY_MIN_INTERESTING, KEY_MAX);
- len += print_modalias_bits(buf+len, 'r', id->relbit, 0, REL_MAX);
- len += print_modalias_bits(buf+len, 'a', id->absbit, 0, ABS_MAX);
- len += print_modalias_bits(buf+len, 'm', id->mscbit, 0, MSC_MAX);
- len += print_modalias_bits(buf+len, 'l', id->ledbit, 0, LED_MAX);
- len += print_modalias_bits(buf+len, 's', id->sndbit, 0, SND_MAX);
- len += print_modalias_bits(buf+len, 'f', id->ffbit, 0, FF_MAX);
- len += print_modalias_bits(buf+len, 'w', id->swbit, 0, SW_MAX);
- len += sprintf(buf+len, "\n");
+ len = print_modalias(buf, PAGE_SIZE, id);
+ len += snprintf(buf + len, PAGE_SIZE-len, "\n");
return len;
}
static CLASS_DEVICE_ATTR(modalias, S_IRUGO, input_dev_show_modalias, NULL);
@@ -728,8 +744,11 @@
if (test_bit(EV_SW, dev->evbit))
INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);
- envp[i] = NULL;
+ envp[i++] = buffer + len;
+ len += snprintf(buffer + len, buffer_size - len, "MODALIAS=");
+ len += print_modalias(buffer + len, buffer_size - len, dev) + 1;
+ envp[i] = NULL;
return 0;
}