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path: root/drivers/usb/usbip/vudc_dev.c
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2017-11-07USB: usbip: Remove redundant license textGreg Kroah-Hartman1-13/+0
Now that the SPDX tag is in all USB 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: Valentina Manea <valentina.manea.m@gmail.com> Acked-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-07usbip: use monotonic timestampsArnd Bergmann1-4/+3
This gets rid of the deprecated do_gettimeofday() function in usbip. The comment above vgadget_get_frame() mentions that it suffers from issues with the time jumps due to suspend and settimeofday, so I'm changing it to use ktime_get_ts64() to use monotonic times that don't have this problem. I couldn't tell whether we should use CLOCK_MONOTONIC or CLOCK_MONOTONIC_RAW here, the difference being the exact rate when correcting for NTP. I picked monotonic time since it doesn't change the speed to the existing code and should be better synchronized with other machines we talk to. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-07usbip: fix off-by-one frame number calculationArnd Bergmann1-1/+1
vgadget_get_frame returns a frame number from 0 to 2046, which may require an expensive division operation to wrap at one lower than the usual number. I can't see any reason for this, and all other drivers wrap at a power-of-two number. My best explanation is that it was a simple typo, so I'm changing the % modulo operator into a cheaper bitmask that the other drivers use, to make it wrap after 0x7ff rather than before it. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04USB: add SPDX identifiers to all remaining files in drivers/usb/Greg Kroah-Hartman1-0/+1
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/usb/ and include/linux/usb* files with the correct SPDX license 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-05usbip: vudc: Refactor init_vudc_hw() to be more obviousKrzysztof Opasiak1-17/+18
Current implementation of init_vudc_hw() adds ep0 to ep_list and then after looping through all endpoints removes it from that list. As this may be misleading let's refactor this function and avoid adding and removing ep0 to eplist and place it immediately in correct place. In addition let's remove redundant 0 assignments as ep array is zeroed during allocation. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Acked-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-18Merge tag 'usb-for-v4.10' of ↵Greg Kroah-Hartman1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next Felipe writes: usb: patches for v4.10 merge window One big merge this time with a total of 166 non-merge commits. Most of the work, by far, is on dwc2 this time (68.2%) with dwc3 a far second (22.5%). The remaining 9.3% are scattered on gadget drivers. The most important changes for dwc2 are the peripheral side DMA support implemented by Synopsys folks and support for the new IOT dwc2 compatible core from Synopsys. In dwc3 land we have support for high-bandwidth, high-speed isochronous endpoints and some non-critical fixes for large scatter lists. Apart from these, we have our usual set of cleanups, non-critical fixes, etc.
2016-11-03usb: ip: remove unnecessary & operationFelipe Balbi1-1/+1
Now that usb_endpoint_maxp() only returns the lowest 11 bits from wMaxPacketSize, we can remove the & operation from this driver. Cc: Valentina Manea <valentina.manea.m@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Cc: <linux-usb@vger.kernel.org> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2016-10-27usb: usbip:checkpatch; fix bare use of unsignedJai Krishna1-4/+4
This patch fixes the following checkpatch warning for usbip files WARNING: Prefer 'unsigned int' to bare use of 'unsigned' Signed-off-by: Jai Krishna <rjk1024@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-30usbip: vudc: Fix apparent cut-n-paste errorDave Jones1-1/+1
Coverity picked up that this looks like a cut-n-paste from an almost identical sequence below that didn't get its variable renamed. Signed-off-by: Dave Jones <davej@codemonkey.org.uk> Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-28usb: usbip: vudc: Rename find_endpoint() to vudc_find_endpoint()Krzysztof Opasiak1-1/+1
As find_endpoint() is a global funcion rename it to vudc_find_endpoint() to clearly mark where does it come from. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-28usb: usbip: vudc: Fix WARN_ON() usage patternKrzysztof Opasiak1-3/+2
Fix WARN_ON() macro usage as suggested by Felipe. Instead of using: if (cond) { WARN_ON(1); do_stuff(); } Use a better pattern with WARN_ON() placed in if condition: if (WARN_ON(cond)) do_stuff(); Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-26usbip: vudc: Add UDC specific opsIgor Kotrasinski1-0/+662
Add endpoints definitions and ops for both endpoints and gadget. Add also a suitable platform driver and functions for handling usbip events. This commit is a result of cooperation between Samsung R&D Institute Poland and Open Operating Systems Student Society at University of Warsaw (O2S3@UW) consisting of: Igor Kotrasinski <ikotrasinsk@gmail.com> Karol Kosik <karo9@interia.eu> Ewelina Kosmider <3w3lfin@gmail.com> Dawid Lazarczyk <lazarczyk.dawid@gmail.com> Piotr Szulc <ps347277@students.mimuw.edu.pl> Tutor and project owner: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Igor Kotrasinski <i.kotrasinsk@samsung.com> Signed-off-by: Karol Kosik <karo9@interia.eu> [Various bug fixes, improvements and commit msg update] Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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