Ian Abbott [Mon, 1 Mar 2021 16:57:57 +0000 (16:57 +0000)]
staging: comedi: dt2814: Clear stale AI data on detach
When the Comedi "detach" handler is called, it is possible that an extra
A/D conversion (triggered during termination of a Comedi asynchronous
command) is still in progress. In that case, the FINISH bit in the
Status register will eventually get set and there will be stale data
waiting to be read from the A/D Data register. The interrupt handler
will also be called if still connected at the time. That should all be
mostly harmless, but it would be better to wait for any such conversion
to complete and clear any stale data during the "detach". Add a custom
"detach" handler `dt2814_detach()` to do that if an interrupt handler
has been set up. (There is no need to do it if no interrupt handler was
set up because Comedi asynchronous command support is disabled in that
case.)
The `ntrig` member of the `struct dt2814_private` pointed to by
`dev->private` is no longer used as a counter to determine the end of
acquisition for a Comedi asynchronous command. The other member
`curadscan` is also unused. Remove the allocation of the private data
during initialization and remove the definition of `struct
dt2814_private` since they are no longer needed.
The support for asynchronous commands in this driver is currently
broken. If interrupts are enabled, the interrupt handler is called at
the end of every A/D conversion. A/D conversions could be due to
software-triggered conversions resulting from Comedi `INSN_READ`
instruction handling, or due to timer-trigger conversions enabled when
a Comedi asynchronous command is set up. We only want the interrupt
handler to read a sample from the A/D Data register for timer-triggered
conversions, but currently it always reads the A/D Data register. Since
the A/D Data register is read twice (to read a 12-bit value from an
8-bit register), that probably interferes with the reading for
software-triggered conversions.
The interrupt handler does not currently do anything with the data, it
just ignores it. It should be written to the Comedi buffer if handling
an asynchronous command.
Other problems are that the driver has no Comedi `cancel` handler to
call when the asynchronous command is being stopped manually, and it
does not handle "infinite" acquisitions (when the command's `stop_src ==
TRIG_NONE`) properly.
Change the interrupt handler to check the timer enable (ENB) bit to
check the asynchronous command is active and return early if not
enabled. Also check the error (ERR) and "conversion complete" (FINISH)
bits, and return early if neither is set. Then the sample can be read
from the A/D Data register to clear the ERR and FINISH bits. If the ERR
bit was set, terminate the acquisition with an error, otherwise write
the data to the Comedi buffer and check for end of acquisition. Replace
the current check for end of acquisition, using the count of completed
scans in `scans_done` (updated by calls to `comedi_buf_write_samples()`)
when `stop_src == TRIG_COUNT`) and allowing "infinite" acquisitions when
`stop_src == TRIG_NONE`.
Add a `cancel` handler function `dt2814_ai_cancel()` that will be called
when the end of acquisition event is processed and when the acquisition
is stopped manually. It turns off the timer enable (ENB) bit in the
Control register, leaving the current channel selected.
Ian Abbott [Mon, 1 Mar 2021 16:57:54 +0000 (16:57 +0000)]
staging: comedi: dt2814: Call dt2814_ai_clear() during initialization
The Comedi "attach" handler `dt2814_attach()` writes to the Control
register to turn off the timer enable 'ENB' bit, which triggers a
conversion. It then sleeps awhile and checks the Status register,
returning an error if the ERR bit is set. However, the ERR bit could
have been set due to the conversion being triggered while the A/D
converter was busy (unlikely) or due to the conversion being triggered
before some previous sample had been read from the A/D Data register.
Replace the existing code with a call to `dt2814_ai_clear()` which waits
for any conversion to finish and then clears any unread data or error
condition. A non-zero return value from `dt2814_ai_clear()` indicates a
time-out while waiting for the A/D converter to become non-busy. Return
an error in that case.
Ian Abbott [Mon, 1 Mar 2021 16:57:53 +0000 (16:57 +0000)]
staging: comedi: dt2814: Don't wait for conversion in interrupt handler
When the interrupt handler decides the final sample has been acquired,
it turns off the timer enable (ENB) bit in the Command register. That
triggers another A/D conversion. The interrupt handler currently waits
for that to finish and then reads the resulting, unwanted sample. Since
the functions for handling Comedi read instructions and for setting up
asynchronous commands now call `dt2814_ai_clear()` to wait for and
discard any spurious A/D conversion, let's remove that code from the
interrupt handler.
Ian Abbott [Mon, 1 Mar 2021 16:57:52 +0000 (16:57 +0000)]
staging: comedi: dt2814: Clear stale AI data before operation
When performing a Comedi read instruction or setting up an asynchronous
command on the AI subdevice, clear any stale data on the A/D registers
by waiting for the Status register's BUSY bit to clear (if set) and then
if the FINISH or ERR bit is set, reading the A/D Data register twice to
clear the stale data.
Shubhrajyoti Datta [Wed, 24 Feb 2021 13:10:39 +0000 (18:40 +0530)]
staging: clocking-wizard: Remove the hardcoding of the clock outputs
The number of output clocks are configurable in the hardware.
Currently the driver registers the maximum number of outputs.
Fix the same by registering only the outputs that are there.
Shubhrajyoti Datta [Wed, 24 Feb 2021 13:10:38 +0000 (18:40 +0530)]
staging: clocking-wizard: Add support for fractional support
Currently the set rate granularity is to integral divisors.
Add support for the fractional divisors.
Only the first output0 is fractional in the hardware.
Shubhrajyoti Datta [Wed, 24 Feb 2021 13:10:37 +0000 (18:40 +0530)]
staging: clocking-wizard: Add support for dynamic reconfiguration
The patch adds support for dynamic reconfiguration of clock output rate.
Output clocks are registered as dividers and set rate callback function
is used for dynamic reconfiguration.
checkpatch gives the following WARNING:
WARNING: Comparisons should place the constant on the right side of the test
this patch fixes the coding style warning.
Du Cheng [Fri, 19 Feb 2021 15:05:26 +0000 (23:05 +0800)]
staging: rtl8192u: fix RT_TRACE() in r8190_rtl8256.c
use MACRO __func__ instead of the literal names for RT_TRACE()
in phy_set_rf8256_bandwidth() and phy_rf8256_config_para_file(),
as reported by scripts/checkpatch.pl.
shivang upadhyay [Fri, 19 Feb 2021 10:08:03 +0000 (15:38 +0530)]
staging: sm750fb: added identifier names for function declarations
checkpatch.pl complains about not having identifiers names in
function declarations . This patch uses the same names as are
used in source file sm750_accel.c , but with snake case.
Phillip Potter [Mon, 15 Feb 2021 23:34:40 +0000 (23:34 +0000)]
staging: rtl8723bs: remove rx_logs/tx_logs/int_logs from drv_types.h
Remove the rx_logs/tx_logs/int_logs struct definitions and their
inclusion within struct adapter as fields, from include/drv_types.h.
They were conditionally compiled based on CONFIG_DBG_COUNTER which
now has no other users in the driver, and were only ever accessed
in a write only fashion via the DBG_COUNTER macro, which has also
been removed.
Phillip Potter [Mon, 15 Feb 2021 23:34:39 +0000 (23:34 +0000)]
staging: rtl8723bs: remove DBG_COUNTER definition from rtw_debug.h
Remove DBG_COUNTER macro definition from include/rtw_debug.h, as
all uses of it have now been removed and it is no longer required.
The DBG_COUNTER incremented values were never actually used anywhere
else in the driver.
Phillip Potter [Mon, 15 Feb 2021 23:34:38 +0000 (23:34 +0000)]
staging: rtl8723bs: remove DBG_COUNTER calls from core/rtw_recv.c
Remove all DBG_COUNTER macro calls from core/rtw_recv.c, as the
corresponding variables are only ever written to and not used. This
makes the code cleaner, and is necessary prior to removing the
DBG_COUNTER definition itself.
Phillip Potter [Mon, 15 Feb 2021 23:34:37 +0000 (23:34 +0000)]
staging: rtl8723bs: remove DBG_COUNTER calls from core/rtw_xmit.c
Remove all DBG_COUNTER macro calls from core/rtw_xmit.c, as the
corresponding variables are only ever written to and not used. This
makes the code cleaner, and is necessary prior to removing the
DBG_COUNTER definition itself.
Phillip Potter [Mon, 15 Feb 2021 23:34:36 +0000 (23:34 +0000)]
staging: rtl8723bs: remove DBG_COUNTER calls from os_dep/xmit_linux.c
Remove all DBG_COUNTER macro calls from os_dep/xmit_linux.c, as the
corresponding variables are only ever written to and not used. This
makes the code cleaner, and is necessary prior to removing the
DBG_COUNTER definition itself.
Phillip Potter [Mon, 15 Feb 2021 23:34:35 +0000 (23:34 +0000)]
staging: rtl8723bs: remove DBG_COUNTER calls from os_dep/recv_linux.c
Remove all DBG_COUNTER macro calls from os_dep/recv_linux.c, as the
corresponding variables are only ever written to and not used. This
makes the code cleaner, and is necessary prior to removing the
DBG_COUNTER definition itself.
Linus Torvalds [Sat, 6 Mar 2021 01:27:59 +0000 (17:27 -0800)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma fixes from Jason Gunthorpe:
"Nothing special here, though Bob's regression fixes for rxe would have
made it before the rc cycle had there not been such strong winter
weather!
- Fix corner cases in the rxe reference counting cleanup that are
causing regressions in blktests for SRP
- Two kdoc fixes so W=1 is clean
- Missing error return in error unwind for mlx5
- Wrong lock type nesting in IB CM"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
RDMA/rxe: Fix errant WARN_ONCE in rxe_completer()
RDMA/rxe: Fix extra deref in rxe_rcv_mcast_pkt()
RDMA/rxe: Fix missed IB reference counting in loopback
RDMA/uverbs: Fix kernel-doc warning of _uverbs_alloc
RDMA/mlx5: Set correct kernel-doc identifier
IB/mlx5: Add missing error code
RDMA/rxe: Fix missing kconfig dependency on CRYPTO
RDMA/cm: Fix IRQ restore in ib_send_cm_sidr_rep
Linus Torvalds [Sat, 6 Mar 2021 01:23:03 +0000 (17:23 -0800)]
Merge tag 'gcc-plugins-v5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull gcc-plugins fixes from Kees Cook:
"Tiny gcc-plugin fixes for v5.12-rc2. These issues are small but have
been reported a couple times now by static analyzers, so best to get
them fixed to reduce the noise. :)
- Fix coding style issues (Jason Yan)"
* tag 'gcc-plugins-v5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
gcc-plugins: latent_entropy: remove unneeded semicolon
gcc-plugins: structleak: remove unneeded variable 'ret'
Linus Torvalds [Sat, 6 Mar 2021 01:21:25 +0000 (17:21 -0800)]
Merge tag 'pstore-v5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore fixes from Kees Cook:
- Rate-limit ECC warnings (Dmitry Osipenko)
- Fix error path check for NULL (Tetsuo Handa)
* tag 'pstore-v5.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
pstore/ram: Rate-limit "uncorrectable error in header" message
pstore: Fix warning in pstore_kill_sb()
Linus Torvalds [Fri, 5 Mar 2021 21:25:23 +0000 (13:25 -0800)]
Merge tag 'for-5.12/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
"Fix DM verity target's optional Forward Error Correction (FEC) for
Reed-Solomon roots that are unaligned to block size"
* tag 'for-5.12/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm verity: fix FEC for RS roots unaligned to block size
dm bufio: subtract the number of initial sectors in dm_bufio_get_device_size
Linus Torvalds [Fri, 5 Mar 2021 20:59:37 +0000 (12:59 -0800)]
Merge tag 'block-5.12-2021-03-05' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
- NVMe fixes:
- more device quirks (Julian Einwag, Zoltán Böszörményi, Pascal
Terjan)
- fix a hwmon error return (Daniel Wagner)
- fix the keep alive timeout initialization (Martin George)
- ensure the model_number can't be changed on a used subsystem
(Max Gurtovoy)
- rsxx missing -EFAULT on copy_to_user() failure (Dan)
- rsxx remove unused linux.h include (Tian)
- kill unused RQF_SORTED (Jean)
- updated outdated BFQ comments (Joseph)
- revert work-around commit for bd_size_lock, since we removed the
offending user in this merge window (Damien)
* tag 'block-5.12-2021-03-05' of git://git.kernel.dk/linux-block:
nvmet: model_number must be immutable once set
nvme-fabrics: fix kato initialization
nvme-hwmon: Return error code when registration fails
nvme-pci: add quirks for Lexar 256GB SSD
nvme-pci: mark Kingston SKC2000 as not supporting the deepest power state
nvme-pci: mark Seagate Nytro XM1440 as QUIRK_NO_NS_DESC_LIST.
rsxx: Return -EFAULT if copy_to_user() fails
block/bfq: update comments and default value in docs for fifo_expire
rsxx: remove unused including <linux/version.h>
block: Drop leftover references to RQF_SORTED
block: revert "block: fix bd_size_lock use"
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