If cdev_add() fails, cdev_del() should be called.
Add the missing cdev_del() call as pointed out by
Dan Carpenter.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add a test for successful call to cdev_alloc() to avoid
potential null dereference. Issue reported by smatch.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Fixes: 874bcba65f ("staging: pi433: New driver")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The SPDX identifier is a legally binding shorthand,
which can be used instead of the full boiler plate text.
All source and header files have SPDX identifiers.
Remove the GPL boiler plate text to reduce file size.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We can just get rid of the "spi_address". It's not clear what the
"address" part of the name means, and the type should have been a u8.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix to return a negative error code from the kthread_run() error
handling case instead of 0, as done elsewhere in this function.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lines containing multiple statements were broken into multiple
lines, increasing readability and complying with the coding standard.
This also fixes several checkpatch.pl errors complaining about
the lines being too long.
Signed-off-by: Sophie Matter <sophie.matter@web.de>
Signed-off-by: Rico Schrage <rico.schrage@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
For multi-line comments, the preferred commenting style from the
coding style Documentation was applied to the comments, meaning
almost blank lines at the beginning and end of the comment.
One changed comment includes a line over 80 characters, causing
checkpatch.pl to complain, however breaking this line would not
make much sense, so it is kept like it is.
Signed-off-by: Sophie Matter <sophie.matter@web.de>
Signed-off-by: Rico Schrage <rico.schrage@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lines have been split where it makes sense to shorten them in order
to comply with the coding standards and fix checkpatch.pl warnings.
There are still lines left that are too long, however breaking
those would impair readability.
Changes in v2:
- now working on staging-next branch of the staging tree
- the changes to the defines previously made are deleted
due to readability
Signed-off-by: Sophie Matter <sophie.matter@web.de>
Signed-off-by: Rico Schrage <rico.schrage@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use GPL-2.0+ based on the license text in each of the files.
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use const array to map switch cases to resulting values.
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Reviewed-by: Marcus Wolf <Marcus.Wolf@Wolf-Entwicklungen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The device structure contains a useless non-atomic users counter which
is subject to race conditions. It has probably been created to handle
the case where remove is executed while operations are still executing
on open fds but this will never happen because of reference counts.
Drop the users counter and move rx buffer {de,}allocation to probe()
and remove(). Remove associated dead code from open() and release().
Remove related TODO entry from ioctl().
Signed-off-by: Hugo Lefeuvre <hle@owl.eu.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the PI433_IOC_WR_TX_CFG case in pi433_ioctl, instance->tx_cfg is
modified via
copy_from_user(&instance->tx_cfg, argp, sizeof(struct pi433_tx_cfg)))
without any kind of synchronization. In the case where two threads
would execute this same command concurrently the tx_cfg field might
enter in an inconsistent state.
Additionally: if ioctl(PI433_IOC_WR_TX_CFG) and write() execute
concurrently the tx config might be modified while it is being
copied to the fifo, resulting in potential data corruption.
Fix: Get instance->tx_cfg_lock before modifying tx config in the
PI433_IOC_WR_TX_CFG case in pi433_ioctl.
Also, do not copy data directly from user space to instance->tx_cfg.
Instead use a temporary buffer allowing future checks for correctness
of copied data and simpler code.
Signed-off-by: Hugo Lefeuvre <hle@owl.eu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Breaks long lines in pi433_if.c, fixing checkpatch.pl warnings:
"WARNING: line over 80 characters"
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Some typos and grammar issues were found in the documentation. These
mistakes were fixed.
Signed-off-by: Shannon Booth <shannon.ml.booth@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes checkpatch warning:
WARNING: prefer 'help' over '---help---' for new help texts
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Breaks long lines in rf69.c, fixing checkpatch.pl warnings:
"WARNING: line over 80 characters"
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Breaks long lines in rf69.h, fixing checkpatch.pl warnings:
"WARNING: line over 80 characters"
Signed-off-by: Simon Sandström <simon@nikanor.nu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pi433_write requires locking due to multiple writers. After acquiring
the lock check if enough free space is available in the kfifo to write
the whole message. This check should prevent partial writes to tx_fifo
so kfifo_reset is not needed anymore.
pi433_tx_thread is the only reader so it does not require locking
after kfifo_reset is removed.
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Reviewed-by: Marcus Wolf <marcus.wolf@wolf-entwicklungen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Split a subtraction across 2 lines in order to make these lines
no longer than 80 columns. Problem found with checkpatch.
Signed-off-by: Eisha Chen-yen-su <chenyensu0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Split some function calls on several lines in order to make these
lines no longer than 80 columns. Problem found with checkpatch.
Signed-off-by: Eisha Chen-yen-su <chenyensu0@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Local variable storing the new value for dio register
so replace with dio_value. Update regaddr to dio_addr
to match.
Fixes checkpatch warnings:
CHECK: Avoid CamelCase: <regValue>
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Local variable storing the new value for bandwidth register
so replace with bandwidth.
Fixes checkpatch warnings:
CHECK: Avoid CamelCase: <newValue>
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Local variable storing the value for modulation register so replace
with modulation_reg.
Fixes checkpatch warnings:
CHECK: Avoid CamelCase: <currentValue>
Signed-off-by: Valentin Vidic <Valentin.Vidic@CARNet.hr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch changes the indentation of the statements after case labels.
The linux coding guidelines do not explicitly mentiond this but pretty
much all existing code doesn't put any statements into the same line of
their belonging case labels. Therefore this adapts to the more usual style.
Please note that there is still a lot of > 80 character lines which will
cause checkpatch warnings. This patch does not intent to fix this
already existing issue.
Signed-off-by: Michael Panzlaff <michael.panzlaff@fau.de>
Signed-off-by: Tillmann Zipperer <tillmann.zipperer@fau.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Updated the include of compat.h to fix checkpatch error
Signed-off-by: Derek Robson <robsonde@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michael Straube