Date: Wed, 27 Apr 2016 10:23:55 -0700 From: John Baldwin <jhb@freebsd.org> To: src-committers@freebsd.org Cc: svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r298708 - in head/sys: dev/cardbus dev/pci mips/nlm powerpc/ofw sparc64/pci Message-ID: <1976035.cgz5COcGKZ@ralph.baldwin.cx> In-Reply-To: <201604271631.u3RGVCjE001316@repo.freebsd.org> References: <201604271631.u3RGVCjE001316@repo.freebsd.org>
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On Wednesday, April 27, 2016 04:31:12 PM John Baldwin wrote: > Author: jhb > Date: Wed Apr 27 16:31:12 2016 > New Revision: 298708 > URL: https://svnweb.freebsd.org/changeset/base/298708 > > Log: > Implement a PCI bus rescan method. > > Rescanning a PCI bus uses the following steps: > - Fetch the current set of child devices and save it in the 'devlist' > array. > - Allocate a parallel array 'unchanged' initalized with NULL pointers. > - Scan the bus checking each slot (and each function on slots with a > multifunction device). > - If a valid function is found, look for a matching device in the 'devlist' > array. If a device is found, save the pointer in the 'unchanged' array. > If a device is not found, add a new device. > - After the scan has finished, walk the 'devlist' array deleting any > devices that do not have a matching pointer in the 'unchanged' array. > - Finally, fetch an updated set of child devices and explicitly attach any > devices that are not present in the 'unchanged' array. > > This builds on the previous changes to move subclass data management into > pci_alloc_devinfo(), pci_child_added(), and bus_child_deleted(). > > Subclasses of the PCI bus use custom rescan logic explicitly override the > rescan method to disable rescans. > > Differential Revision: https://reviews.freebsd.org/D6018 Argh, I thought for certain I had done a tinderbox build, but using kobj_error_method breaks the build. I will test a fix that adds a null_rescan method instead and commit it shortly. -- John Baldwin
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