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authorLinus Torvalds <torvalds@linux-foundation.org>2019-11-07 11:54:54 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-11-07 11:54:54 -0800
commit847120f859cc45e074204f4cf33c8df069306eb2 (patch)
tree7798366c3662a0b597686e70bff4611168e2339e /drivers/hid
parent4dd58158254c8a027f2bf5060b72ef64cafa3b9d (diff)
parentff479731c3859609530416a18ddb3db5db019b66 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
Pull HID fixes from Jiri Kosina: "Two fixes for the HID subsystem: - regression fix for i2c-hid power management (Hans de Goede) - signed vs unsigned API fix for Wacom driver (Jason Gerecke)" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid: HID: wacom: generic: Treat serial number and related fields as unsigned HID: i2c-hid: Send power-on command after reset
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/i2c-hid/i2c-hid-core.c4
-rw-r--r--drivers/hid/wacom.h15
-rw-r--r--drivers/hid/wacom_wac.c10
3 files changed, 25 insertions, 4 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index d9c55e30f986..04c088131e04 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -447,8 +447,12 @@ static int i2c_hid_hwreset(struct i2c_client *client)
if (ret) {
dev_err(&client->dev, "failed to reset device.\n");
i2c_hid_set_power(client, I2C_HID_PWR_SLEEP);
+ goto out_unlock;
}
+ /* At least some SIS devices need this after reset */
+ ret = i2c_hid_set_power(client, I2C_HID_PWR_ON);
+
out_unlock:
mutex_unlock(&ihid->reset_lock);
return ret;
diff --git a/drivers/hid/wacom.h b/drivers/hid/wacom.h
index 4a7f8d363220..203d27d198b8 100644
--- a/drivers/hid/wacom.h
+++ b/drivers/hid/wacom.h
@@ -202,6 +202,21 @@ static inline void wacom_schedule_work(struct wacom_wac *wacom_wac,
}
}
+/*
+ * Convert a signed 32-bit integer to an unsigned n-bit integer. Undoes
+ * the normally-helpful work of 'hid_snto32' for fields that use signed
+ * ranges for questionable reasons.
+ */
+static inline __u32 wacom_s32tou(s32 value, __u8 n)
+{
+ switch (n) {
+ case 8: return ((__u8)value);
+ case 16: return ((__u16)value);
+ case 32: return ((__u32)value);
+ }
+ return value & (1 << (n - 1)) ? value & (~(~0U << n)) : value;
+}
+
extern const struct hid_device_id wacom_ids[];
void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len);
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 2b0a5b8ca6e6..ccb74529bc78 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -2303,7 +2303,7 @@ static void wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field
case HID_DG_TOOLSERIALNUMBER:
if (value) {
wacom_wac->serial[0] = (wacom_wac->serial[0] & ~0xFFFFFFFFULL);
- wacom_wac->serial[0] |= (__u32)value;
+ wacom_wac->serial[0] |= wacom_s32tou(value, field->report_size);
}
return;
case HID_DG_TWIST:
@@ -2319,15 +2319,17 @@ static void wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field
return;
case WACOM_HID_WD_SERIALHI:
if (value) {
+ __u32 raw_value = wacom_s32tou(value, field->report_size);
+
wacom_wac->serial[0] = (wacom_wac->serial[0] & 0xFFFFFFFF);
- wacom_wac->serial[0] |= ((__u64)value) << 32;
+ wacom_wac->serial[0] |= ((__u64)raw_value) << 32;
/*
* Non-USI EMR devices may contain additional tool type
* information here. See WACOM_HID_WD_TOOLTYPE case for
* more details.
*/
if (value >> 20 == 1) {
- wacom_wac->id[0] |= value & 0xFFFFF;
+ wacom_wac->id[0] |= raw_value & 0xFFFFF;
}
}
return;
@@ -2339,7 +2341,7 @@ static void wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field
* bitwise OR so the complete value can be built
* up over time :(
*/
- wacom_wac->id[0] |= value;
+ wacom_wac->id[0] |= wacom_s32tou(value, field->report_size);
return;
case WACOM_HID_WD_OFFSETLEFT:
if (features->offset_left && value != features->offset_left)