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    SubjectRe: [PATCH 3/3] net: wireless: bcm43xx: big_buffer_sem semaphore to mutex
    Date
    On Saturday, 15 of December 2007, Michael Buesch wrote:
    > On Saturday 15 December 2007 01:51:47 Rafael J. Wysocki wrote:
    > > On Friday, 14 of December 2007, Michael Buesch wrote:
    > > > On Friday 14 December 2007 13:59:54 Simon Holm Thøgersen wrote:
    > > > > > This user did get the following messages in dmesg:
    > > > > >
    > > > > > b43err(dev->wl, "Firmware file \"%s\" not found "
    > > > > > "or load failed.\n", path);
    > > > >
    > > > > So the question seems to be why b43 needs version 4, when b43legacy and
    > > > > bcm43x uses version 3?
    > > >
    > > > That's really a question, right?
    > > >
    > > > Well. linux-2.4 doesn't work with the linux-2.6 modutils.
    > > > Windows Vista doesn't work with Windows 98 device drivers.
    > > > That leads to this assumption:
    > > > b43 doesn't work with version 3 firmware but needs version 4.
    > > >
    > > > Newer drivers supporting newer hardware need newer firmware.
    > >
    > > Actually, can you explain why, from the technical point of view, the version 4
    > > firware is better than version 3, please?
    >
    > version 4 is the new firmware released by broadcom. They obviously won't
    > support and write any version 3 firmware anymore. So we are forced to
    > switch to version 4 firmware to support the newest hardware (like N-PHY
    > in the future). It's really as simple as that.

    I see, thanks.

    > The difference between v3 and v4 is basically the driver API. It changed
    > a lot and it is nontrivial to support both v3 and v4 in one driver.
    > So we decided to stay with v3 for legacy devices and take v4 for any newer
    > devices.

    This is reasonable, yes.

    > We have to live with that crap until someone comes up with an opensource
    > firmware. :)

    Well, the only problem with that is I suspect there are some "newer" cards that
    work better with v3 firmware, although they are supposed to support both.

    Greetings,
    Rafael
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