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Re: [PATCH 2/2] iwlwifi: pcie: add support for AX101NGW

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On Mon, 2023-01-02 at 22:00 +0800, Aiden Leong wrote:
> 1. Please have a look at the second commit: 
> https://lore.kernel.org/linux-wireless/iwlwifi.20200323151304.ec4f463bde60.I14e9146a99621ff11ce50bc746a4b88af508fee0@changeid/
> 
> Find the `goto found;` statement.
> 
> The logic was to find the FIRST match then break with `goto found`. The 
> refactor code removed the `goto` statement which is incorrect.
> 
> 
> 2. Let's go back to the first commit: 
> https://lore.kernel.org/linux-wireless/iwlwifi.20211024165252.abd85e1391cb.I7681fe90735044cc1c59f120e8591b7ac125535d@changeid/
> 
>  > We don't want to change the semantics ("most generic entry must come 
> first")
> 
> That `semantics` was mislead by the previous commit.
> 
> 
> On 2023/1/2 21:35, Greenman, Gregory wrote:
> > On Mon, 2023-01-02 at 10:40 +0800, Aiden Leong wrote:
> > > Revert:
> > > commit 3f7320428fa4 ("iwlwifi: pcie: simplify iwl_pci_find_dev_info()")
> > > 
> > > A bug was introduced by:
> > > commit 32ed101aa140 ("iwlwifi: convert all Qu with Jf devices to the new
> > > config table"),
> > > where a goto statement was removed.
> > Not sure I undestand what problem reversing the "for" loop solves.
> > 
> > > Signed-off-by: Aiden Leong <aiden.leong@xxxxxxxxx>
> > > ---
> > > Notice:
> > > Please run further tests before merging. I'm NOT familiar with device
> > > drivers.
> > > ---
> > >   drivers/net/wireless/intel/iwlwifi/pcie/drv.c | 2 +-
> > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/drv.c b/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
> > > index a46df1320372..5d74adbd49cf 100644
> > > --- a/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
> > > +++ b/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
> > > @@ -1461,7 +1461,7 @@ iwl_pci_find_dev_info(u16 device, u16 subsystem_device,
> > >          if (!num_devices)
> > >                  return NULL;
> > >   
> > > -       for (i = num_devices - 1; i >= 0; i--) {
> > > +       for (i = 0; i < num_devices; i++) {
> > >                  const struct iwl_dev_info *dev_info = &iwl_dev_info_table[i];
> > >   
> > >                  if (dev_info->device != (u16)IWL_CFG_ANY &&

So, the fix itself is correct (thanks for fixing it!).
The commit message should be a bit changed, the "goto" removal is not relevant
in the current code since now this for loop is in a separate function. Also, all
wifi commits should have prefix "wifi: " to separate them from the rest of netdev.
Tell me if you want to resend this commit or I can fix it by myself.





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