Re: [PATCH v2] dgnc: Don't save boards in memory that have failed to initialize

From: Mark Hounschell
Date: Sun Mar 15 2015 - 08:07:41 EST

On 03/14/2015 04:44 AM, Greg KH wrote:
On Fri, Mar 13, 2015 at 04:55:55PM -0400, Mark Hounschell wrote:
On 03/12/2015 12:14 PM, Giedrius StatkeviÄius wrote:
On 2015.03.12 12:08, Greg KH wrote:
On Mon, Mar 09, 2015 at 06:29:38PM +0200, Giedrius StatkeviÄius wrote:
Remove BOARD_FAILED and don't save dgnc_boards which failed to

Assign the result of kzalloc() to brd in dgnc_found_board() and only put
it in the dgnc_Board[] if it successfully initializes. Also, remove
BOARD_FAILED enum and all ifs that check for it. Finally, remove one
final place where state was set to BOARD_FAILED which was even redundant
before this patch.

Signed-off-by: Giedrius StatkeviÄius <giedrius.statkevicius@xxxxxxxxx>
v2: Remove "brd = dgnc_Board[dgnc_NumBoards];" line which I forgot to do
in the first version

drivers/staging/dgnc/dgnc_driver.c | 20 ++------------------
drivers/staging/dgnc/dgnc_driver.h | 3 +--
drivers/staging/dgnc/dgnc_mgmt.c | 5 +----
drivers/staging/dgnc/dgnc_tty.c | 8 --------
4 files changed, 4 insertions(+), 32 deletions(-)

diff --git a/drivers/staging/dgnc/dgnc_driver.c b/drivers/staging/dgnc/dgnc_driver.c
index fa1ee79..075727d 100644
--- a/drivers/staging/dgnc/dgnc_driver.c
+++ b/drivers/staging/dgnc/dgnc_driver.c
@@ -401,8 +401,7 @@ static int dgnc_found_board(struct pci_dev *pdev, int id)
unsigned long flags;

/* get the board structure and prep it */
- dgnc_Board[dgnc_NumBoards] = kzalloc(sizeof(*brd), GFP_KERNEL);
- brd = dgnc_Board[dgnc_NumBoards];
+ brd = kzalloc(sizeof(*brd), GFP_KERNEL);

You've done a great job here, but...

Yeah, sorry...

I really want to see this whole "static list of boards/cards" go away.
There should not be any need for that in any in-kernel driver. Your
patch here is a sign that things are really wrong with this whole static
array mess.

So could you do that instead? I don't want to take patches around this
whole "board state" mess anymore, as it should all not be needed at all.

If you need pointers on what needs to be done here, just let me know.


greg k-h

I can try :) But my main concern is the lack of dgnc driver maintainers
activity and that I don't own the hardware this driver is written for as
it's quite expensive (cheapest cards I've found start at 300$~) and I
can't afford it ATM. But I guess if I keep the patches small and logical
everything will be okay.

I am on the maintainers list and actually have hardware. I have just been so
swamped the last few months that I haven't been able to do ANYTHING here.
Even work on the dgap driver that I was working on, I just haven't had the
time. I can tell you that the dgnc driver does NOT work at all and hasn't
worked since it was introduced into staging by Greg.

Really? It's always been broken? Why don't we just delete the thing?

Well, broken might not be the best word. I should have just said, doesn't work for me.
It did work on a 3.4 kernel when I provided it to you. I have spent no time as to why but will take a look on Monday.

Greg, while I'm here, how can we get Digi firmware into the kernel firmware
tree? The dgap card is useless without it and I suspect the dgnc is as well.

Submit a patch to the linux-firmware git tree with the firmware in it.

I don't know if the binary blobs are GPL compatable?


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