mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-05 17:03:47 -04:00
67f9085596
Commit566f1dd528("PCI: Relax bridge window tail sizing rules") relaxed the bridge window requirements for non-optional size (size0) but pbus_size_mem() also handles optional sizes (IOV resources) using size1. This can manifest, e.g., as a failure to resize a BAR back to its original size after it was first shrunk when device has a VF BAR resource because the bridge window (size1) is enlarged beyond what is strictly required to fit the downstream resources. Allow using relaxed bridge window tail sizing rules also with the optional resources (size1) so that the remove/realloc cycle during BAR resize (smaller and back to the original size) does not fail unexpectedly due to increase in bridge window size demand. Also move add_align calculation to more logical place next to size1 assignment as they are strongly related to each other. Link: https://lore.kernel.org/r/20241216175632.4175-5-ilpo.jarvinen@linux.intel.com Fixes:566f1dd528("PCI: Relax bridge window tail sizing rules") Reported-by: Michał Winiarski <michal.winiarski@intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Tested-by: Xiaochun Lee <lixc17@lenovo.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.