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files)
Replace the #include of <linux/mod_devicetable.h> by the more specific
<linux/device-id/*.h> where applicable. For most cases the include
can be dropped completely, only a few drivers need one or two headers
added.
Acked-by: Danilo Krummrich <dakr@kernel.org>
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
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The MMS134S and MMS136 touch controllers have an event size of 6 bytes
rather than 8 bytes. When __mms114_read_reg() reads the touch data
packet from the device into the touch buffer, the events are packed
tightly at 6-byte intervals. However, the driver iterates through the
events using standard C array indexing (touch[index]), where each
element is sizeof(struct mms114_touch) (8 bytes) apart. As a result, any
touch events beyond the first one are read from incorrect offsets and
parsed improperly.
Fix this by explicitly calculating the byte offset for each touch event
based on the device's specific event size.
Fixes: 53fefdd1d3a3 ("Input: mms114 - support MMS136")
Fixes: ab108678195f ("Input: mms114 - support MMS134S")
Reported-by: sashiko-bot@kernel.org
Assisted-by: Antigravity:gemini-3.5-flash
Reviewed-by: Bryam Vargas <hexlabsecurity@proton.me>
Link: https://patch.msgid.link/20260616050912.1531241-1-dmitry.torokhov@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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goodix_ts_read_input_report() copies the number of touch points reported
by the device into an on-stack buffer
u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
which is sized for at most GOODIX_MAX_CONTACTS (10) contacts. The only
runtime check bounds the per-interrupt count against ts->max_touch_num,
but that value is taken verbatim from a 4-bit field of the device
configuration block and is never clamped:
ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f;
The nibble can be 0..15, so a malfunctioning, malicious or counterfeit
controller (or an attacker tampering with the I2C bus) can advertise up
to 15 contacts. goodix_ts_read_input_report() then accepts a touch_num
of up to 15 and the second goodix_i2c_read() writes
ts->contact_size * (touch_num - 1) bytes past the one-contact header into
point_data - up to 30 bytes (45 with the 9-byte report format) beyond the
92-byte buffer: a stack out-of-bounds write.
Clamp max_touch_num to GOODIX_MAX_CONTACTS, the number of contacts
point_data[] is sized for, when reading it from the configuration.
Fixes: a7ac7c95d468 ("Input: goodix - use max touch number from device config")
Cc: stable@vger.kernel.org
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Link: https://patch.msgid.link/20260612-b4-disp-6844625d-v1-1-df0aed080c9d@proton.me
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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mms114_interrupt() reads a packet of touch data from the device into a
fixed-size on-stack buffer
struct mms114_touch touch[MMS114_MAX_TOUCH];
which holds MMS114_MAX_TOUCH (10) events of MMS114_EVENT_SIZE (8) bytes,
i.e. 80 bytes. The length of the I2C read into it is taken verbatim from
the device:
packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE);
if (packet_size <= 0)
goto out;
...
error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size,
(u8 *)touch);
packet_size is a single device register byte (0x0F) and the only check
is the lower bound packet_size <= 0; it is never bounded against the
size of touch[]. A malfunctioning, malicious or counterfeit controller
(or an attacker tampering with the I2C bus) can report a packet_size of
up to 255, so __mms114_read_reg() writes up to 175 bytes past the end of
touch[] on the IRQ-thread stack: a stack out-of-bounds write that can
overwrite the stack canary, saved registers and the return address.
A well-formed device never reports more than the buffer holds, so reject
an oversized packet and drop the report, consistent with the handler's
other error paths, rather than reading past the buffer.
Fixes: 07b8481d4aff ("Input: add MELFAS mms114 touchscreen driver")
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260612-b4-disp-dc4b8dc4-v1-1-d7cb0a828d92@proton.me
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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tw_interrupt() accumulates each non-zero serial byte into a fixed
three-byte buffer with a running index that is only reset once a full
packet has been received *and* the device's two Y bytes agree:
tw->data[tw->idx++] = data;
if (tw->idx == TW_LENGTH && tw->data[1] == tw->data[2]) {
...
tw->idx = 0;
}
The reset is gated on tw->data[1] == tw->data[2], a value the device
controls. A malicious, malfunctioning or counterfeit Touchwindow
peripheral can stream non-zero bytes whose 2nd and 3rd bytes differ: the
index reaches TW_LENGTH without the equality holding, is never reset, and
keeps growing, so tw->data[tw->idx++] walks off the end of the three-byte
array and the rest of the heap-allocated struct tw, one attacker-chosen
byte at a time -- an unbounded, device-driven heap out-of-bounds write.
Reset the index on every completed packet and report an event only when
the two Y bytes match, like the other serio touchscreen drivers do.
Fixes: 11ea3173d5f2 ("Input: add driver for Touchwin serial touchscreens")
Cc: stable@vger.kernel.org
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Link: https://patch.msgid.link/20260613-b4-disp-69921bfd-v1-1-82c036899959@proton.me
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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The workaround for XPT2046 clears the command register, giving the
touchscreen controller a NOP. The change incorrectly re-uses the
req->scratch variable which is used as rx_buf for xfer[5], so by
the time xfer[6] occurs, the contents of req->scratch may not be
0. It was found that the touchscreen controller can end up in
a completely unresponsive state due to it being given a command
the driver does not expect.
Instead, rely on the spi_transfer behavior of tx_buf being NULL to
transmit all 0 bits and use the scratch variable for the rx_buf for
both the 1 byte command to and 2 byte response from the controller.
Also relocates the scratch member of struct ser_req to force it
into a different cache line to prevent any potential issues of
DMA stepping on unrelated data in other struct members due to
sharing the same cache line.
This change was tested on real TSC2046 and ADS7843 controllers,
but not the XPT2046 the workaround was originally created for.
Confirming that the original modification to clear the command
register does not impact either real controller.
Fixes: 781a07da9bb94 ("Input: ads7846 - add dummy command register clearing cycle")
Cc: stable@vger.kernel.org
Co-developed-by: Mark Featherston <mark@embeddedTS.com>
Signed-off-by: Mark Featherston <mark@embeddedTS.com>
Signed-off-by: Kris Bahnsen <kris@embeddedTS.com>
Link: https://patch.msgid.link/20260507164943.760009-1-kris@embeddedTS.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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On some boards, the SPI controller is limited to half-duplex and the driver
fails spamming "ads7846 spi2.1: spi_sync --> -22". Restore half-duplex
support with multiple SPI transfers.
Fixes: 9c9509717b53 ("Input: ads7846 - convert to full duplex")
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Link: https://patch.msgid.link/20260419161848.825831-2-aaro.koskinen@iki.fi
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Sync up with mainline to pull in a fix to IMS PCU driver and other
enhancements.
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The driver doesn't make use of the value that was explicitly assigned to
the .driver_data members. Drop the assignment. While touching the array,
convert it to use named initialization which is easier to understand.
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
Link: https://patch.msgid.link/20260515165135.498505-2-u.kleine-koenig@baylibre.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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While being less compact, using named initializers allows to more easily
see which members of the structs are assigned which value without having
to lookup the declaration of the struct. And it's also more robust
against changes to the struct definition.
The mentioned robustness is relevant for a planned change to struct
i2c_device_id that replaces .driver_data by an anonymous union.
This patch doesn't modify the compiled arrays, only their representation
in source form benefits. The former was confirmed with x86 and arm64
builds.
Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com>
Link: https://patch.msgid.link/20260515164848.497608-2-u.kleine-koenig@baylibre.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Add driver for Wacom W9002 and two Wacom W9007A variants. These are
penabled touchscreens supporting passive Wacom Pens and use I2C.
Co-developed-by: Ferass El Hafidi <funderscore@postmarketos.org>
Signed-off-by: Ferass El Hafidi <funderscore@postmarketos.org>
Signed-off-by: Hendrik Noack <hendrik-noack@gmx.de>
Link: https://patch.msgid.link/20260528074818.12151-3-hendrik-noack@gmx.de
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Use the __free(kfree) macro for the obuf allocation in mxt_object_show()
to simplify the code.
Assisted-by: Gemini:gemini-3.1-pro
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://patch.msgid.link/20260504185448.4055973-3-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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In mxt_update_cfg(), the driver calculates the memory size needed to store
the configuration as data->mem_size - cfg.start_ofs. If data->mem_size is
less than or equal to cfg.start_ofs, this calculation will underflow or
result in a zero-size buffer, neither of which is valid for a configuration
update.
Add a check to return -EINVAL if data->mem_size is too small. While at it,
change the types of start_ofs and mem_size in struct mxt_cfg to u16 to
match the device address space.
Assisted-by: Gemini:gemini-3.1-pro
Link: https://patch.msgid.link/20260504185448.4055973-2-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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When a configuration file provides an object size that is larger than the
driver's known mxt_obj_size(object), the driver intends to discard the
extra bytes.
The loop iterates using for (i = 0; i < size; i++). Inside the loop, the
condition to skip processing extra bytes is:
if (i > mxt_obj_size(object))
continue;
Since i is a 0-based index, the valid indices for the object are 0 through
mxt_obj_size(object) - 1.
When i == mxt_obj_size(object), the condition evaluates to false, and the
code processes the byte instead of discarding it.
This causes the code to calculate byte_offset = reg + i - cfg->start_ofs
and writes the byte there, overwriting exactly one byte of the adjacent
instance or object.
Update the boundary check to skip extra bytes correctly by using >=.
Fixes: 50a77c658b80 ("Input: atmel_mxt_ts - download device config using firmware loader")
Cc: stable@vger.kernel.org
Assisted-by: Gemini:gemini-3.1-pro
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://patch.msgid.link/20260504185448.4055973-1-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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The current implementation sends a separate power-down command
after reading the Z2 value, resulting in an extra I2C
transaction per measurement cycle.
The TSC2007 command byte contains a 2-bit power-down mode
selection field. By selecting the power-down state in the Z2
measurement command, the device powers down after the Z2 A/D
conversion completes, eliminating the subsequent power-down
transaction.
This reduces the number of I2C transactions by one per touch
measurement cycle, decreasing I2C bus overhead and improving
touch sampling performance.
Signed-off-by: Yuki Horii <yuuki198708@gmail.com>
Tested-by: Andreas Kemnade <andreas@kemnade.info> # GTA04
Link: https://patch.msgid.link/20260410074100.1660-1-horiiyuk@ishida.co.jp
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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The calculations done to obtain byte_offset can result into a negative
number, fix its type.
This patch fixes the following sparse error:
drivers/input/touchscreen/atmel_mxt_ts.c:1481:44: warning: unsigned value that used to be signed checked against zero?
drivers/input/touchscreen/atmel_mxt_ts.c:1479:49: signed value source
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Link: https://patch.msgid.link/20260504-fix-sparse-v1-1-1071137cd280@chromium.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Support for the ezx series of phones was removed in 2022, this
driver is just dead code.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260430164326.2766500-2-arnd@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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nexio_read_data() pulls data_len and x_len from a packed __be16 header
in the device's interrupt packet and then walks packet->data[0..x_len)
and packet->data[x_len..data_len) comparing each byte against a
threshold.
Both fields are 16-bit on the wire (max 65535). The existing
adjustments shave at most 0x100 / 0x80 off, so the loop bound can still
reach roughly 0xfeff. The URB transfer buffer for NEXIO is rept_size
(1024) bytes from usb_alloc_coherent(), with the first 7 occupied by the
packed header — so packet->data[] has 1017 valid bytes. read_data()
callbacks are not given urb->actual_length, and nothing else bounds the
walk.
A device that lies about its length can get a ~64 KiB out-of-bounds read
past the coherent DMA allocation. The first index whose byte exceeds
NEXIO_THRESHOLD lands in begin_x / begin_y and from there into the
reported touch coordinates, so adjacent kernel memory contents leak to
userspace as ABS_X / ABS_Y events. Far enough out, the read can also
hit an unmapped page and fault.
Fix this all by clamping data_len to the buffer's data[] capacity and
x_len to data_len.
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Fixes: 5197424cdccc ("Input: usbtouchscreen - add NEXIO (or iNexio) support")
Cc: stable <stable@kernel.org>
Assisted-by: gkh_clanker_t1000
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/2026042026-chlorine-epidermis-fd6d@gregkh
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Fix a few formatting issues reported by checkpatch.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Add support for an optional "reset-gpios" property. If present, the
driver drives the reset line high at probe time and releases it during
power-on, after the regulators have been enabled.
Signed-off-by: Petr Hodina <petr.hodina@protonmail.com>
Co-developed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260409-stmfts5-v4-8-64fe62027db5@ixit.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Make code cleaner, compiler will optimize it away anyway.
Preparation for FTM5 support, where more steps are needed.
Signed-off-by: Petr Hodina <petr.hodina@protonmail.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260409-stmfts5-v4-6-64fe62027db5@ixit.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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We must power off regulators and ensure that IRQ is disabled when
failing at power on phase. Create stmfts_configure function to limit
use of goto.
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260409-stmfts5-v4-5-64fe62027db5@ixit.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Improves readability and makes splitting power on function in following
commit easier.
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260409-stmfts5-v4-4-64fe62027db5@ixit.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Switch to devm_regulator_bulk_get_const() to stop setting the supplies
list in probe(), and move the regulator_bulk_data struct in static const.
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260409-stmfts5-v4-3-64fe62027db5@ixit.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Makes the code better readable and noticably shorter.
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260409-stmfts5-v4-2-64fe62027db5@ixit.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Replace the bogus "GPL v2" with "GPL" as MODULE_LICNSE() string. The
value does not declare the module's exact license, but only lets the
module loader test whether the module is Free Software or not.
See commit bf7fbeeae6db ("module: Cure the MODULE_LICENSE "GPL" vs.
"GPL v2" bogosity") in the details of the issue. The fix is to use
"GPL" for all modules under any variant of the GPL.
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://patch.msgid.link/20260409-stmfts5-v4-1-64fe62027db5@ixit.cz
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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The commit 68743c500c6e ("Input: edt-ft5x06 - use per-client debugfs
directory") removed the manual debugfs teardown, relying on the I2C core
to handle it. However, this creates a window where debugfs files are
still accessible after edt_ft5x06_ts_teardown_debugfs() frees
tsdata->raw_buffer.
To prevent a use-after-free, protect the freeing of raw_buffer with the
device mutex and set raw_buffer to NULL. The debugfs read function
already checks if raw_buffer is NULL under the same mutex, so this
safely avoids the use-after-free.
Fixes: 68743c500c6e ("Input: edt-ft5x06 - use per-client debugfs directory")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/adnJicDh-bTUaWXP@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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This touchscreen controller was used om Gateway AOL Connected Touchpad
released in 2000 and, according to Wikipedia, removed from the market
in October 2001 due to slow sales.
It looks like it can still be bought on eBay for $1000 but I really
doubt anyone will actually use it.
Remove the driver.
Link: https://patch.msgid.link/20240808172733.1194442-5-dmitry.torokhov@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Use the common USB helpers for looking up bulk and interrupt endpoints
(and determining endpoint numbers) instead of open coding.
Note that the NEXIO data interface has two bulk endpoints (see commit
5197424cdccc ("Input: usbtouchscreen - add NEXIO (or iNexio) support")
for the descriptors).
The lookup in probe handles both bulk-in and interrupt-in endpoints and
was added to handle NEXIO devices. Replace the open coded lookup with a
lookup for the common interrupt endpoint and an explicit fallback
accepting a bulk endpoint.
This iterates over the (two) endpoints twice for NEXIO devices but makes
it more clear what is going on.
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260401082212.2180434-1-johan@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Without a reported resolution, userspace was assuming 1 unit/mm which
is wildly wrong: a regular smartphone is clearly not 2.4 meters tall.
Most applications do not care much for this kind of raw mm value,
but Phosh's on-screen keyboard would accidentally trigger swipe-to-close
gestures due to misinterpreting small movements as huge ones.
Do what the older goodix.c driver does and set the resolution to 10
units/mm to make sure the numbers calculated by userspace are reasonable.
Signed-off-by: Val Packett <val@packett.cool>
Link: https://patch.msgid.link/20260321073242.556253-1-val@packett.cool
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Start using __free() and guard() primitives to simplify the code
and error handling.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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This makes the code more compact and error handling more robust.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Instead of requesting interrupt normally and immediately disabling it
with call to disable_irq() use IRQF_NOAUTOEN to keep it disabled until
it is needed. This avoids a tiny window when interrupt is enabled but
not needed.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Also use list_first_entry() instead of list_entry() to emphasize intent.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Start using __free() and guard() primitives to simplify the code
and error handling.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code and shows critical section more clearly.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Also stop trying to check if input device is opened/in use in the
interrupt handler - the interrupt is disabled when device is closed or
suspended.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Using guard notation makes the code more compact and error handling
more robust by ensuring that locks are released in all code paths
when control leaves critical section.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Start using __free() and guard() primitives to simplify the code
and error handling.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Guard notation simplifies code.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Use __free(fwnode_handle) cleanup facility to ensure that references to
acquired fwnodes are dropped at appropriate times automatically.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Do not define or use iqs5xx_ihex_rec structure: the original code was
using just a couple of fields in it and instead used it to calculate
offset to record data. The data field was actually reserving space for
checksum.
Instead iterate through fields and advance pointer explicitly.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Start using __free() and guard() primitives to simplify the code and error
handling.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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