From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Valmer Huhn <valmer.huhn@concurrent-rt.com>
Cc: gregkh@linuxfoundation.org, sudip.mukherjee@codethink.co.uk,
jan.kiszka@siemens.com, linux-serial@vger.kernel.org
Subject: Re: [PATCH] serial: 8250_exar: Fix number of ports for Commtech PCIe cards
Date: Thu, 13 Aug 2020 22:28:45 +0300 [thread overview]
Message-ID: <20200813192845.GJ1891694@smile.fi.intel.com> (raw)
In-Reply-To: <20200813165255.GC345440@icarus.concurrent-rt.com>
On Thu, Aug 13, 2020 at 12:52:55PM -0400, Valmer Huhn wrote:
Thanks for an update, my comments below.
> The following in 8250_exar.c line 589 is used to determine the number
> of ports for each Exar board:
>
> nr_ports = board->num_ports ? board->num_ports : pcidev->device & 0x0f;
>
> If the number of ports a card has is not explicitly specified, it defaults
> to the rightmost 4 bits of the PCI device ID. This is prone to error since
> not all PCI device IDs contain a number which corresponds to the number of
> ports that card provides.
>
> This particular case involves COMMTECH_4222PCIE, COMMTECH_4224PCIE and
> COMMTECH_4228PCIE cards with device IDs 0x0022, 0x0020 and 0x0021.
> Currently the multiport cards receive 2, 0 and 1 port instead of 2, 4 and
> 8 ports respectively.
>
> To fix this, each Commtech Fastcom PCIe card is given a struct where the
> number of ports is explicitly specified. This ensures 'board->num_ports'
> is used instead of the default 'pcidev->device & 0x0f'.
...
> Fixes: d0aeaa83f0b0 ("serial: exar: split out the exar code from 8250_pci")
>
Shouldn't be blank line here.
> Signed-off-by: Valmer Huhn <valmer.huhn@concurrent-rt.com>
...
> Tested-by: Valmer Huhn <valmer.huhn@concurrent-rt.com>
This tag (Tested-by: Author_of_the_patch) is implied. We don't want patches
that weren't tested by authors.
After cutter line '---' you missed to provide a changelog along with bumping
patch version. Hint, use -v<X> when run `git format-patch ...`
P.S. Next should be v3, so `git format-patch -v3 ...`.
--
With Best Regards,
Andy Shevchenko
prev parent reply other threads:[~2020-08-13 19:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-13 16:52 [PATCH] serial: 8250_exar: Fix number of ports for Commtech PCIe cards Valmer Huhn
2020-08-13 19:28 ` Andy Shevchenko [this message]
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