From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Jiri Kosina <jikos@kernel.org>,
Benjamin Tissoires <bentiss@kernel.org>,
Andrew Duggan <aduggan@synaptics.com>
Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 05/12] HID: rmi: re-select page 0 across device resets
Date: Fri, 13 Nov 2026 21:59:55 -0800 [thread overview]
Message-ID: <20261113-hid-rmi-v1-5-afc43d97d766@gmail.com> (raw)
In-Reply-To: <20261113-hid-rmi-v1-0-afc43d97d766@gmail.com>
Hardware resets its page select register to page 0 across resets and
power transitions while the driver cache still retains the previous
non-zero page, causing subsequent register accesses to address the wrong
page.
Explicitly re-select page 0 when resetting device attention mode.
Fixes: 9fb6bf02e3ad ("HID: rmi: introduce RMI driver for Synaptics touchpads")
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
drivers/hid/hid-rmi.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index 8783edb7fd6a..d3e4ee0f62f0 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -321,6 +321,12 @@ static int rmi_reset_attn_mode(struct hid_device *hdev)
if (ret)
return ret;
+ mutex_lock(&data->page_mutex);
+ ret = rmi_set_page(hdev, 0);
+ mutex_unlock(&data->page_mutex);
+ if (ret)
+ return ret;
+
if (test_bit(RMI_STARTED, &data->flags))
ret = rmi_dev->driver->reset_handler(rmi_dev);
--
2.56.0.679.gc527c65306-goog
next prev parent reply other threads:[~2026-11-14 6:00 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-14 5:59 [PATCH 00/12] HID: rmi: Fix report handling, device lifecycle, and clean up code Dmitry Torokhov
2026-11-14 5:59 ` [PATCH 01/12] HID: rmi: return error on short output report writes Dmitry Torokhov
2026-11-14 5:59 ` [PATCH 02/12] HID: rmi: only strip trailing 0xff bytes from attention reports Dmitry Torokhov
2026-11-14 5:59 ` [PATCH 03/12] HID: rmi: validate read data report and protocol transfer bounds Dmitry Torokhov
2026-11-14 5:59 ` [PATCH 04/12] HID: rmi: fix device lifecycle, suspend, and reset work handling Dmitry Torokhov
2026-11-14 5:59 ` Dmitry Torokhov [this message]
2026-11-14 5:59 ` [PATCH 06/12] HID: rmi: avoid GFP_ATOMIC allocation with hard IRQs disabled Dmitry Torokhov
2026-11-14 5:59 ` [PATCH 07/12] HID: rmi: do not mutate shared platform data template Dmitry Torokhov
2026-11-14 5:59 ` [PATCH 08/12] HID: rmi: use put_unaligned_le16() to populate output reports Dmitry Torokhov
2026-11-14 5:59 ` [PATCH 09/12] HID: rmi: use scope-based cleanup for mode feature buffer Dmitry Torokhov
2026-11-14 6:00 ` [PATCH 10/12] HID: rmi: switch to scoped mutex guards Dmitry Torokhov
2026-11-14 6:00 ` [PATCH 11/12] HID: rmi: remove dead code and reorder report write helper Dmitry Torokhov
2026-11-14 6:00 ` [PATCH 12/12] HID: rmi: clean up coding style and logging Dmitry Torokhov
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