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2018-01-17staging: dgnc: drop unused neo_uart_structGreg Kroah-Hartman2-6/+1
Now that the "neo" portion of the driver is gone (it was never being used), drop the unused neo_uart_struct variable as well. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: remove "vpd" board variableGreg Kroah-Hartman3-31/+0
It was only ever read from the device, and spit out to the kernel log for no good reason. So remove it, and the way it was read from the device, and the now unused "board file" callback. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: delete serial_num board variableGreg Kroah-Hartman1-2/+0
No one was even ever setting the thing, so just remove it. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: delete a bunch of PCI board variablesGreg Kroah-Hartman2-22/+0
None of these were being used at all, only set and never used again, so remove them from the code. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: delete is_pci_express board type variable.Greg Kroah-Hartman2-9/+0
It was only set, and never looked at, so drop the thing as no one cares about it. And when it was set, it was not even set correctly, the index it was using to read from was incorrect, so this has never even been correct... Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: delete dpastatus board type variable.Greg Kroah-Hartman3-10/+0
It was only set, and never looked at, so drop the thing as no one cares about it. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: delete dpatype board type variable.Greg Kroah-Hartman3-10/+0
It was only set, and never looked at, so drop the thing as no one cares about it. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: delete dgnc_pci.hGreg Kroah-Hartman2-32/+11
Move the few #defines we actually use into the dgnc_driver.c file, no need to have a .h file for a driver that is only used by a single .c file. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: delete dgnc_neo.* filesGreg Kroah-Hartman5-1850/+0
As the Neo devices were never actually supported by the driver, delete the files that purported to control that type of device as they are not needed. This will let us shrink the driver a lot over time. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-17staging: dgnc: remove PCI_DEVICE_NEO stuffGreg Kroah-Hartman2-91/+0
The "Neo" devices are never allowed to be bound to this driver, as they are not in the valid list of PCI ids, so delete them from the driver as the code in the probe function has no way to ever run. Also delete the defines that are no longer used in relation to the Neo devices, as they are not needed anymore. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: remove duplicated tty definesGreg Kroah-Hartman1-24/+0
The dgnc driver defined numerous TTY defines that the core kernel already defines. So just remove this duplication. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: make dgnc_poll_tick staticGreg Kroah-Hartman2-2/+1
No one needs to see this global variable, so make it static. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: remove some global variablesGreg Kroah-Hartman2-3/+0
There were some global variables not being used at all, so just delete them. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: make dgnc_poll_lock staticGreg Kroah-Hartman2-2/+1
There's no need for this spinlock to be global, so make it a static variable. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: make dgnc_num_boards staticGreg Kroah-Hartman2-2/+1
There's no need for the world to know the number of dgnc boards in the system, so just make it a static variable. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: remove crazy "management" device nodeGreg Kroah-Hartman5-348/+1
There's no need for a special character device just to get some random information out of a single serial port driver. So remove the dgnc_mgmt.c file, and some structures and ioctl definitions that only it was using. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: delete dgnc_utils.cGreg Kroah-Hartman4-27/+2
There was just one function in it, and it duplicated what msleep_interruptable() was doing, which is pointless, so delete it and fix up the one calling site. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: remove redundant license textGreg Kroah-Hartman12-120/+0
Now that the SPDX tag is in all drivers/staging/dgnc files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: add SPDX identifier.Greg Kroah-Hartman12-0/+12
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Fix up the staging dgnc driver to have a proper SPDX identifier, based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-06staging: dgnc: add identifiers to function parametersAshish Kalra1-2/+2
Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ashish Kalra <eashishkalra@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-27staging: dgnc: Fix usleep_range is preferred over udelayJoshua Abraham1-1/+1
This patch fixes the issue: CHECK: usleep_range is preferred over udelay; see Documentation/timers/timers-howto.txt Signed-off-by: Joshua Abraham <j.abraham1776@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-13Merge tag 'staging-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds3-28/+7
Pull staging and IIO updates from Greg KH: "Here is the "big" staging and IIO driver update for 4.15-rc1. Lots and lots of little changes, almost all minor code cleanups as the Outreachy application process happened during this development cycle. Also happened was a lot of IIO driver activity, and the typec USB code moving out of staging to drivers/usb (same commits are in the USB tree on a persistent branch to not cause merge issues.) Overall, it's a wash, I think we added a few hundred more lines than removed, but really only a few thousand were modified at all. All of these have been in linux-next for a while. There might be a merge issue with Al's vfs tree in the pi433 driver (take his changes, they are always better), and the media tree with some of the odd atomisp cleanups (take the media tree's version)" * tag 'staging-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (507 commits) staging: lustre: add SPDX identifiers to all lustre files staging: greybus: Remove redundant license text staging: greybus: add SPDX identifiers to all greybus driver files staging: ccree: simplify ioread/iowrite staging: ccree: simplify registers access staging: ccree: simplify error handling logic staging: ccree: remove dead code staging: ccree: handle limiting of DMA masks staging: ccree: copy IV to DMAable memory staging: fbtft: remove redundant initialization of buf staging: sm750fb: Fix parameter mistake in poke32 staging: wilc1000: Fix bssid buffer offset in Txq staging: fbtft: fb_ssd1331: fix mirrored display staging: android: Fix checkpatch.pl error staging: greybus: loopback: convert loopback to use generic async operations staging: greybus: operation: add private data with get/set accessors staging: greybus: loopback: Fix iteration count on async path staging: greybus: loopback: Hold per-connection mutex across operations staging: greybus/loopback: use ktime_get() for time intervals staging: fsl-dpaa2/eth: Extra headroom in RX buffers ...
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman2-0/+2
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-18staging: dgnc: Convert timers to use timer_setup()Kees Cook1-5/+3
In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: driverdev-devel@linuxdriverproject.org Cc: devel@driverdev.osuosl.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-09-18Staging: dgnc: Remove unused fields in struct channel_tSrishti Sharma1-6/+0
Eliminate the fields that are not used and the comments associated with them. Signed-off-by: Srishti Sharma <srishtishar@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-09-18Staging: dgnc: Remove unused fields in struct dgnc_boardSrishti Sharma1-9/+0
Remove unused fields and comments associated with them in the structure definition. Signed-off-by: Srishti Sharma <srishtishar@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-09-18staging: dgnc: remove variable rcAastha Gupta1-7/+4
Found using coccinelle script: @@ local idexpression ret; expression e; @@ -ret = +return e; -return ret; Signed-off-by: Aastha Gupta <aastha.gupta4104@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-09-18staging: dgnc: remove unused variableAastha Gupta1-1/+0
This patch removes unused variable. Signed-off-by: Aastha Gupta <aastha.gupta4104@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-25dgnc: fix multiple blank lines coding style problemAliza Minkov1-2/+0
According to the coding-style documentation, functions in source files should be separated with one blank line. Redundant blank lines were removed from this source file, in accordance with coding-style documentation. Signed-off-by: Aliza Minkov <minkov.al@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-16drivers/staging: refactor dgnc tty registration.Haim Daniel2-104/+59
-remove duplicate tty allocation code for serial and printer drivers. -add missing tty c_ispeed and c_ospeed initialization to 9600. -fix sparse warning: too long initializer-string for array of char. This patch was only unit tested due to lack of the actual hardware. Signed-off-by: Haim Daniel <haimdaniel@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29staging: dgnc: remove error message taskTobin C. Harding1-2/+0
TODO file lists task to remove unnecessary error messages. There are no unnecessary error messages in the driver, this must have been done already. Remove task from TODO file. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29staging: dgnc: remove dead codeTobin C. Harding1-9/+0
Driver contains dead code, guarded with #ifdef's. We can safely remove this, it will be in the git history if it is later needed. Remove dead code. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29staging: dgnc: remove struct member magic numbersTobin C. Harding6-139/+119
Driver uses magic number members within structs, this is an antiquated method of catching data errors. We don't do things that way any more. Remove magic number struct members. Remove all checks to magic numbers. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29staging: dgnc: remove unnecessary commentsTobin C. Harding6-522/+97
TODO file lists task to remove unnecessary comments. Make initial attempt at removing unnecessary comments. Choose not to be to vicious in removal. We can remove more once the driver is cleaned up/tested some more. For functions with internal linkage, reduce the function comment where possible. For functions with external linkage, migrate the function comment to kernel doc format. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29staging: dgnc: remove double underscoreTobin C. Harding8-24/+26
Pre-processor header guards use double underscore, typically kernel code uses single underscore when defining header guards. 'endif' statement should include what is ending as a comment string. Remove double underscore, add comment string to 'endif' Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29staging: dgnc: clean up header commentsTobin C. Harding5-235/+349
TODO file has task: remove unnecessary comments. Driver uses some custom comment format. Driver would be better if it used kernel doc format. Audit header file comments. Replace struct comments with kernel doc format comments. Remove unnecessary comments. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-23staging: dgnc: remove tracing prints in dgnc_tty.cAbhishek Bhardwaj1-4/+0
Remove tracing prints in dgnc_tty_send_xchar. The same functionality could be achieved by using ftrace. Signed-off-by: Abhishek Bhardwaj <abshkbh@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-16staging: dgnc: preserve return codeTobin C. Harding1-3/+3
Return code from tty_check_change() should be being preserved. Preserve return code from call to tty_check_change(). Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-14staging: dgnc: remove useless switch-case statementsDaeseok Youn1-9/+1
The dgnc_tty_send_break() has a switch-case condition for msec. It is no use except case -1. Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-14staging: dgnc: ch->ch_bd is already assigned to bd variableDaeseok Youn1-4/+4
The bd variables in functions are already assigned from ch->ch_bd but it is not used in those functions except checking NULL. The ch->ch_bd could be replaced with bd variable. Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-14staging: dgnc: remove explicit castTobin C. Harding1-1/+1
Function return type is 'int'. Returned variable is of type 'uint'. uint can be implicitly converted to int. Most significant bit is not set so there is no risk in implicit conversion. Remove unnecessary type cast. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-14staging: dgnc: fix whitespace before returnTobin C. Harding3-4/+14
Checkpatch emits CHECK: Blank lines aren't necessary before a close brace '}'. Previous attempts were made to make uniform the error handling in dgnc but improvements are still possible. Undo whitespace changes that should not have been made :(. Make return statement placement uniform throughout dgnc. Fix checkpatch CHECK. Make whitespace changes only. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-14staging: dgnc: return error code directlyTobin C. Harding1-36/+32
In various functions a return code variable is defined at the top of function, for example; rc = -ENODEV; and then the variable is returned. This makes it harder to read since it separates the error code from the return site. Return the error code directly instead of using a variable. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-12staging: dgnc: remove item from TODO listTobin C. Harding1-1/+0
TODO file contains task to verify and correct function return sites. Need to check for and implement correct usage of goto's when there is work to be done before returning. Remove task from TODO list after already having completed audit of directory drivers/staging/dgnc. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-12staging: dgnc: audit goto's in dgnc_ttyTobin C. Harding1-107/+112
TODO file requests fix up of error handling. Audit dgnc_mgmt.c and fix all return paths to be uniform and inline with kernel coding style. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-12staging: dgnc: audit goto's in dgnc_mgmtTobin C. Harding1-17/+20
TODO file requests fix up of error handling. Audit dgnc_mgmt.c and fix all return paths to be uniform and inline with kernel coding style. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-12staging: dgnc: audit goto's in dgnc_driverTobin C. Harding1-18/+5
TODO file requests fix up of error handling. Audit dgnc_driver.c and fix all return paths to be uniform and inline with kernel coding style. Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-07staging: dgnc: replace usleep_range with udelayAishwarya Pant1-1/+3
udelay is impelmented using a busy-wait loop and consumes CPU cycles while usleep_range is implemented using interrupts.cls_flush_uart_write() is called after a channel lock is acquired i.e. an atomic context. Hence delay in this method should use udelay instead of usleep_range. Signed-off-by: Aishwarya Pant <aishpant@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-07staging: dgnc: Constify ktermios structureGargi Sharma1-1/+1
The ktermios structure is a local default termios struct. All ports are initially created with this termios. Since, the structure is never modified, it can be declared as const. Coccinelle Script: @r disable optional_qualifier@ identifier s,i; position p; @@ static struct ktermios i@p = { ... }; @ok1@ identifier r.i; expression e; position p; @@ e = i@p @bad@ position p != {r.p,ok1.p}; identifier r.i; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct ktermios i = { ... }; File Size before: text data bss dec hex filename 25469 2048 256 27773 6c7d drivers/staging/dgnc/dgnc_tty.o File Size after: text data bss dec hex filename 25636 2016 256 27908 6d04 drivers/staging/dgnc/dgnc_tty.o Signed-off-by: Gargi Sharma <gs051095@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-06staging: dgnc: replace udelay with usleep_rangeAishwarya Pant1-1/+1
Fix checkpatch warning on dgnc_cls.c: CHECK usleep_range is preferred over udelay. udelay(t) in function cls_uart_init is within non-atomic context and can be safely replaced by usleep_range(t, t + delta) where delta is t (as t is between 10 and 20 microseconds). Signed-off-by: Aishwarya Pant <aishpant@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>