On 08/11, Greg KH wrote: > On Sun, Aug 10, 2014 at 09:19:15PM +0200, Konrad Zapalowicz wrote: > > On 08/10, Greg KH wrote: > > > On Sat, Aug 09, 2014 at 08:16:37PM +0200, Konrad Zapalowicz wrote: > > > > This commit binds global variables of dgnc driver in a structure so > > > > that it is logically consistent. The structure is accessed via getter > > > > function and as a result the externing of globals is removed. The names > > > > of the variables are also changed to be more eye friendly. > > > > > > > > Signed-off-by: Konrad Zapalowicz <bergo.torino@xxxxxxxxx> > > > > --- > > > > > > > > This patch applies on top of my two previous patch series. In case it > > > > is an issue I can resubmit the whole series for dgnc driver as one > > > > patch set - just let me know. > > > > > > > > drivers/staging/dgnc/dgnc_driver.c | 82 +++++++++++++++++++------------------- > > > > drivers/staging/dgnc/dgnc_driver.h | 20 ++++++---- > > > > drivers/staging/dgnc/dgnc_mgmt.c | 48 ++++++++++++---------- > > > > drivers/staging/dgnc/dgnc_sysfs.c | 31 ++++++++++---- > > > > 4 files changed, 102 insertions(+), 79 deletions(-) > > > > > > > > diff --git a/drivers/staging/dgnc/dgnc_driver.c b/drivers/staging/dgnc/dgnc_driver.c > > > > index 724e4ab..9a23e9a 100644 > > > > --- a/drivers/staging/dgnc/dgnc_driver.c > > > > +++ b/drivers/staging/dgnc/dgnc_driver.c > > > > @@ -83,17 +83,11 @@ static const struct file_operations dgnc_BoardFops = { > > > > .release = dgnc_mgmt_close > > > > }; > > > > > > > > - > > > > -/* > > > > - * Globals > > > > - */ > > > > -uint dgnc_NumBoards; > > > > -struct dgnc_board *dgnc_Board[MAXBOARDS]; > > > > -DEFINE_SPINLOCK(dgnc_global_lock); > > > > -int dgnc_driver_state = DRIVER_INITIALIZED; > > > > -ulong dgnc_poll_counter; > > > > -uint dgnc_Major; > > > > -int dgnc_poll_tick = 20; /* Poll interval - 20 ms */ > > > > +static struct dgnc_driver driver = { > > > > + .lock = __SPIN_LOCK_UNLOCKED(driver.lock), > > > > + .state = DRIVER_INITIALIZED, > > > > + .poll_tick = 20, > > > > +}; > > > > > > While it is great to get rid of a bunch of globals, you now just > > > replaced it with a different one :( > > > > > > This all should be dynamic, no need for a static array of devices at > > > all. > > > > > > There shouldn't be a need for the driver_state at all, and the poll_tick > > > should be device specific, not driver-wide. The major is fine, but it > > > can just be a single static variable, right? > > > > > > So, I'd like to see the array of devices go away, can you do that > > > instead of just moving it elsewhere? > > > > No doubt that there is a lot of room for improvement in this code. Now, > > since I'm new to this driver and do not own the hardware yet I'm > > taking the step-by-step approach patiently learning the code and > > dependencies between different files of this driver. > > That's fine, and is a good thing to do. > > > Now, do you accept this patch knowing that this is an ongoing process of > > this driver refubrishment and there will be more patches (ie. I can base > > the future work on this patch) or you prefer it to be done differently > > (ie. I should revert and do it right from the beginning). > > I think you should do this "correct" from the beginning, I don't want to > take this patch. Ok. > How about doing the "easy" things first, like the driver-static > variables you have here and try to get rid of them, except for > dgnc_Major, that should just be a simple static variable. > > Get rid of dgnc_driver_state, that shouldn't be needed, and the poll > counter mess, that should be device specific, not a global for the > driver. Then move to the device-specific things, making them dynamic > and living off of the device structure that the kernel gives you (in the > tty device). > > Does that sound reasonable? Thanks, I appreciate the guidelines. I especially found intersting the suggestion to put emphasis on using the tty device structure. Cheers, Konrad > thanks, > > greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel