Fwd: Question about USB hotplug

Forward to USB mail alias for the USB question. Original post Subject: Question about USB hotplug Date: Sat, 14 Jun 2014 09:59:45 +0800 Sender: Simon Guo Receiver: kernelnewbies@kernelnewbies.org, wei.guo.si...@gmail.com Hi, dear list, I want to be clear about the USB hotplug

Re: why a static function is in kernel symbol table

I think I found the cause. After GCC optimization, those static functions are not visible any more in the object file (not sure because of function inlining?). Thus, they don't show up in vmlinux or /proc/kallsyms. I tried changing it to -O0, they all show up. Thanks, Ji On Fri, Jun 13, 2014 at

Question about USB hotplug

Hi, dear list, I want to be clear about the USB hotplug procedure. I read "Linux Device Driver" and "Documentation/usb/hotplug.txt", and google much. Per my understanding, the USB hotplug works as following: 1) Insertion of physical U-disk will trigger a hardware interrupt. And interrupt handler

Re: Unable to access mounted sd card partition on resume from hibernate

On Fri, Jun 13, 2014 at 7:22 PM, wrote: > On Fri, 13 Jun 2014 12:37:18 +0530, AYAN KUMAR HALDER said: > >> [ 201.509858] FAT-fs (mmcblk0): Directory bread(block 32768) failed > > That smells suspiciously like the driver failing to properly re-init > the card when powering back up from a resume..

Re: USB Device Driver

Hello Greg, I was rushing into posting the mail here, just finished writing up a small driver that switches my phone into ADK mode. The project is http://blog.praveenkumar.co.in/2014/05/gsoc-14-proposal-for-beagleorg.html . The skel helped me in the end. We are trying to develop this driver for th

Re: USB Device Driver

On Fri, Jun 13, 2014 at 09:54:17AM +0200, Vlad Ungureanu wrote: > Hello, > > During Google Summer of Code we are developing an USB Device Driver for an > Android phone. That's great, which project is doing this? What type of USB driver are you needing to create? A "gadget" or a "normal" driver?

Re: Unable to access mounted sd card partition on resume from hibernate

On Fri, 13 Jun 2014 12:37:18 +0530, AYAN KUMAR HALDER said: > [ 201.509858] FAT-fs (mmcblk0): Directory bread(block 32768) failed That smells suspiciously like the driver failing to properly re-init the card when powering back up from a resume pgp6v0QjC8CWI.pgp Description: PGP signature _

Re: SOC: Zedboard: Driver question

On Thu, Jun 12, 2014 at 04:39:25PM +0300, amit mehta wrote: > We are working on a school project in which we are trying to develop a > audio mixer on Zedboard (Development board from Digilent). We have > developed the IP and have integrated it with the overall hardware > using Programmable logic. T

Re: USB Device Driver

On Fri, Jun 13, 2014 at 1:24 PM, Vlad Ungureanu wrote: > Hello, > > During Google Summer of Code we are developing an USB Device Driver for an > Android phone. Mainly we want to make an ADK driver *switch the phone to ADK > mode or back to normal mode from inside the kernel*. I looked a bit over t

Re: Disabling a BH : spin_lock_bh or local_bh_disable.

On Fri, Jun 13, 2014 at 12:27 PM, priyaranjan wrote: > Hi All, > > I was referring to "Unreliable Guide To Locking by Paul Rusty Russell". > > Here is a quote below :- > > "If a bottom half shares data with user context, you have two problems. > Firstly, the current user context can be interrupte

Re: Eudyptula Challenge Task 01

Jeff Haran writes: > Unless you happened to be consigned to using Outlook because your > employer's IT is all MS, through which it is impossible to send a > plain text email without it getting munged one way or another. emacs runs fine on Windows too, so using Gnus is always an option for the mo

USB Device Driver

Hello, During Google Summer of Code we are developing an USB Device Driver for an Android phone. Mainly we want to make an ADK driver *switch the phone to ADK mode or back to normal mode from inside the kernel*. I looked a bit over the Internet to find a recent example of USB Device Drivers but th

RE: why a static function is in kernel symbol table

Thank you very much for replying. I actually notice that there are many static functions in that file. However, some of them show up in symbol table, the rest do not. So what you are saying is that there is no connection between being a static function and showing up in kernel symbol table. Th

Unable to access mounted sd card partition on resume from hibernate

Hi All, I am working on a ARM based custom platform which has a mmc controller (by Designware.) The mmc controller driver is dw-mmc.c. On kernel bootup, I insert the driver and then I mount the mmc device on /mnt. I am able to perform file-system operation(ls, cp, mv, rm) on /mnt. Then without un