Hello,
On 12/10/2016 17:01:08 CEST, Valo, Kalle wrote:
"Vittorio Gambaletta (VittGam)" <linux-wireless@xxxxxxxxxxx> writes:
So, after seeing that the rest of the file is sorted this way (generic
section after the specific ones), I concluded that the 0x002A sorting
was wrong in the first place, and so is 0x0029. Then I sent this patch
to fix this.
I can't see how changing the order in ath_pci_id_table[] would make any
difference in functionality, but I might be missing something.
It does: I've looked through the relevant code, and found that PCI device
matching from that table is done sequentially in pci_match_id() from
drivers/pci/pci-driver.c.
So if a generic PCI_VDEVICE entry (that has both subvendor and subdevice IDs
set to PCI_ANY_ID) is put before a more specific one (PCI_DEVICE_SUB), then
the generic PCI_VDEVICE entry will match first and will be used.
Ah, now it makes sense. Thanks for patiently explaining this to me :)
You're welcome :)
So to tell the full story I'll change the commit log to something like
below. Does it look ok to you?
Yes; but I'd change "So" to "This turned out to be wrong", and add a note
about changing the order for 0x002A too:
----------------------------------------------------------------------
ath9k: Really fix LED polarity for some Mini PCI AR9220 MB92 cards.
The active_high LED of my Wistron DNMA-92 is still being recognized as
active_low on 4.7.6 mainline. When I was preparing my former commit
0f9edcdd88a9 ("ath9k: Fix LED polarity for some Mini PCI AR9220 MB92
cards.") to fix that I must have somehow messed up with testing, because
I tested the final version of that patch before sending it, and it was
apparently working; but now it is not working on 4.7.6 mainline.
I initially added the PCI_DEVICE_SUB section for 0x0029/0x2096 above the
PCI_VDEVICE section for 0x0029; but then I moved the former below the
latter after seeing how 0x002A sections were sorted in the file.
This turned out to be wrong: if a generic PCI_VDEVICE entry (that has
both subvendor and subdevice IDs set to PCI_ANY_ID) is put before a more
specific one (PCI_DEVICE_SUB), then the generic PCI_VDEVICE entry will
match first and will be used.
With this patch, 0x0029/0x2096 has finally got active_high LED on 4.7.6.
While I'm at it, let's fix 0x002A too by also moving its generic definition
below its specific ones.
Fixes: 0f9edcdd88a9 ("ath9k: Fix LED polarity for some Mini PCI AR9220 MB92 cards.")
Cc: <stable@xxxxxxxxxxxxxxx> #4.7+
Signed-off-by: Vittorio Gambaletta <linuxbugs@xxxxxxxxxxx>
[kvalo@xxxxxxxxxxxxxxxx: improve the commit log based on email discussions]
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx>
----------------------------------------------------------------------
Cheers,
Vittorio
