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authorLamarque V. Souza <lamarque@gmail.com>2012-12-06 12:39:55 -0200
committerJiri Kosina <jkosina@suse.cz>2012-12-07 11:12:27 +0100
commit4529eefad087f97b33c0f31984d924b1f15d7bae (patch)
treeb88ae9ea27c1c46a7e991778ad91e4b89b36cda9 /drivers
parentae751fa82dd8e5a79932d6b55742e7e298afd733 (diff)
HID: hidp: fallback to input session properly if hid is blacklisted
This patch against kernel 3.7.0-rc8 fixes a kernel oops when turning on the bluetooth mouse with id 0458:0058 [1]. The mouse in question supports both input and hid sessions, however it is blacklisted in drivers/hid/hid-core.c so the input session is one that should be used. Long ago (around kernel 3.0.0) some changes in the bluetooth subsystem made the kernel do not fallback to input session when hid session is not supported or blacklisted. This patch restore that behaviour by making the kernel try the input session if hid_add_device returns ENODEV. The patch exports hid_ignore() from hid-core.c so that it can be used in the bluetooth subsystem. [1] https://bugzilla.kernel.org/show_bug.cgi?id=39882 Signed-off-by: Lamarque V. Souza <lamarque@gmail.com> Acked-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hid/hid-core.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index a7550bb30836..2629d5240d63 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -2145,8 +2145,13 @@ static const struct hid_device_id hid_mouse_ignore_list[] = {
{ }
};
-static bool hid_ignore(struct hid_device *hdev)
+bool hid_ignore(struct hid_device *hdev)
{
+ if (hdev->quirks & HID_QUIRK_NO_IGNORE)
+ return false;
+ if (hdev->quirks & HID_QUIRK_IGNORE)
+ return true;
+
switch (hdev->vendor) {
case USB_VENDOR_ID_CODEMERCS:
/* ignore all Code Mercenaries IOWarrior devices */
@@ -2201,6 +2206,7 @@ static bool hid_ignore(struct hid_device *hdev)
return !!hid_match_id(hdev, hid_ignore_list);
}
+EXPORT_SYMBOL_GPL(hid_ignore);
int hid_add_device(struct hid_device *hdev)
{
@@ -2212,8 +2218,7 @@ int hid_add_device(struct hid_device *hdev)
/* we need to kill them here, otherwise they will stay allocated to
* wait for coming driver */
- if (!(hdev->quirks & HID_QUIRK_NO_IGNORE)
- && (hid_ignore(hdev) || (hdev->quirks & HID_QUIRK_IGNORE)))
+ if (hid_ignore(hdev))
return -ENODEV;
/*

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