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author | Thomas Gleixner <tglx@linutronix.de> | 2021-12-06 23:51:50 +0100 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2021-12-16 22:22:20 +0100 |
commit | bf5e758f02fc739589dcc6a3395c3a3eb77b5c90 (patch) | |
tree | 5829e365ed469cf59d515539dd336a866124fc65 /Kbuild | |
parent | ef3350c53d2aac65cf1c4ecc968bbb1de5f421ea (diff) | |
download | linux-bf5e758f02fc739589dcc6a3395c3a3eb77b5c90.tar.bz2 |
genirq/msi: Simplify sysfs handling
The sysfs handling for MSI is a convoluted maze and it is in the way of
supporting dynamic expansion of the MSI-X vectors because it only supports
a one off bulk population/free of the sysfs entries.
Change it to do:
1) Creating an empty sysfs attribute group when msi_device_data is
allocated
2) Populate the entries when the MSI descriptor is initialized
3) Free the entries when a MSI descriptor is detached from a Linux
interrupt.
4) Provide functions for the legacy non-irqdomain fallback code to
do a bulk population/free. This code won't support dynamic
expansion.
This makes the code simpler and reduces the number of allocations as the
empty attribute group can be shared.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210749.224917330@linutronix.de
Diffstat (limited to 'Kbuild')
0 files changed, 0 insertions, 0 deletions