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HID: hid-logitech: Collect report descriptors before sending 

The current code allows several consecutive calls to hid_parse_report(),
which may have happened to work before, but would cause a memory leak
and generally be incorrect. This patch collects all the reports
before sending them once.

Cc: Nestor Lopez Casado <nlopezcasad@logitech.com>
Tested-by: Benjamin Tissoires <benjamin.tissoires@gmail.com
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Henrik Rydberg 2012-04-22 14:21:39 +02:00 committed by Jiri Kosina
parent 07d9ab4f0e
commit 2a039bf5a6
1 changed files with 29 additions and 42 deletions
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71
drivers/hid/hid-logitech-dj.c
View File

@ -155,6 +155,14 @@ static const char media_descriptor[] = {
/* Maximum size of all defined hid reports in bytes (including report id) */
#define MAX_REPORT_SIZE 8
/* Make sure all descriptors are present here */
#define MAX_RDESC_SIZE \
(sizeof(kbd_descriptor) + \
sizeof(mse_descriptor) + \
sizeof(consumer_descriptor) + \
sizeof(syscontrol_descriptor) + \
sizeof(media_descriptor))
/* Number of possible hid report types that can be created by this driver.
*
* Right now, RF report types have the same report types (or report id's)
@ -473,9 +481,17 @@ static int logi_dj_output_hidraw_report(struct hid_device *hid, u8 * buf,
return 0;
}
static void rdcat(char **rdesc, unsigned int *rsize, const char *data, unsigned int size)
{
memcpy(*rdesc + *rsize, data, size);
*rsize += size;
}
static int logi_dj_ll_parse(struct hid_device *hid)
{
struct dj_device *djdev = hid->driver_data;
unsigned int rsize = 0;
char *rdesc;
int retval;
dbg_hid("%s\n", __func__);
@ -483,70 +499,38 @@ static int logi_dj_ll_parse(struct hid_device *hid)
djdev->hdev->version = 0x0111;
djdev->hdev->country = 0x00;
rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL);
if (!rdesc)
return -ENOMEM;
if (djdev->reports_supported & STD_KEYBOARD) {
dbg_hid("%s: sending a kbd descriptor, reports_supported: %x\n",
__func__, djdev->reports_supported);
retval = hid_parse_report(hid,
(u8 *) kbd_descriptor,
sizeof(kbd_descriptor));
if (retval) {
dbg_hid("%s: sending a kbd descriptor, hid_parse failed"
" error: %d\n", __func__, retval);
return retval;
}
rdcat(&rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor));
}
if (djdev->reports_supported & STD_MOUSE) {
dbg_hid("%s: sending a mouse descriptor, reports_supported: "
"%x\n", __func__, djdev->reports_supported);
retval = hid_parse_report(hid,
(u8 *) mse_descriptor,
sizeof(mse_descriptor));
if (retval) {
dbg_hid("%s: sending a mouse descriptor, hid_parse "
"failed error: %d\n", __func__, retval);
return retval;
}
rdcat(&rdesc, &rsize, mse_descriptor, sizeof(mse_descriptor));
}
if (djdev->reports_supported & MULTIMEDIA) {
dbg_hid("%s: sending a multimedia report descriptor: %x\n",
__func__, djdev->reports_supported);
retval = hid_parse_report(hid,
(u8 *) consumer_descriptor,
sizeof(consumer_descriptor));
if (retval) {
dbg_hid("%s: sending a consumer_descriptor, hid_parse "
"failed error: %d\n", __func__, retval);
return retval;
}
rdcat(&rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor));
}
if (djdev->reports_supported & POWER_KEYS) {
dbg_hid("%s: sending a power keys report descriptor: %x\n",
__func__, djdev->reports_supported);
retval = hid_parse_report(hid,
(u8 *) syscontrol_descriptor,
sizeof(syscontrol_descriptor));
if (retval) {
dbg_hid("%s: sending a syscontrol_descriptor, "
"hid_parse failed error: %d\n",
__func__, retval);
return retval;
}
rdcat(&rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor));
}
if (djdev->reports_supported & MEDIA_CENTER) {
dbg_hid("%s: sending a media center report descriptor: %x\n",
__func__, djdev->reports_supported);
retval = hid_parse_report(hid,
(u8 *) media_descriptor,
sizeof(media_descriptor));
if (retval) {
dbg_hid("%s: sending a media_descriptor, hid_parse "
"failed error: %d\n", __func__, retval);
return retval;
}
rdcat(&rdesc, &rsize, media_descriptor, sizeof(media_descriptor));
}
if (djdev->reports_supported & KBD_LEDS) {
@ -554,7 +538,10 @@ static int logi_dj_ll_parse(struct hid_device *hid)
__func__, djdev->reports_supported);
}
return 0;
retval = hid_parse_report(hid, rdesc, rsize);
kfree(rdesc);
return retval;
}
static int logi_dj_ll_input_event(struct input_dev *dev, unsigned int type,