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| author | Niklas Cassel <cassel@kernel.org> | 2026-03-12 16:02:29 +0300 |
|---|---|---|
| committer | Manivannan Sadhasivam <mani@kernel.org> | 2026-03-15 19:34:22 +0300 |
| commit | 0834d6f4abd0ca35b5706d267a6e4b78303a95de (patch) | |
| tree | a5e5a6e096e69e19d2aa913064ffe3d58948540e /include | |
| parent | 0b74f7d72399d4c4422ed3d68ef28b3612f71e74 (diff) | |
| download | linux-0834d6f4abd0ca35b5706d267a6e4b78303a95de.tar.xz | |
PCI: endpoint: Do not mark the BAR succeeding a 64-bit BAR as BAR_RESERVED
A BAR that can only be configured as a 64-bit BAR by an EPC driver is
marked as such using the "only_64bit" flag.
Currently, the documentation says that an EPC driver should explicitly
mark the BAR succeeding an "only_64bit" BAR as BAR_RESERVED.
However, a 64-bit BAR will always take up two BARs. It is thus redundant
to mark both BARs.
pci_epc_get_next_free_bar() already skips the BAR succeeding a "only_64bit"
BAR, regardless if the succeeding BAR is marked as BAR_RESERVED or not.
Thus, drop the BAR_RESERVED for a BAR succeeding a "only_64bit" BAR.
No functional changes.
Suggested-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260312130229.2282001-13-cassel@kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pci-epc.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index c021c7af175f..c981ea7d52c0 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -206,8 +206,7 @@ enum pci_epc_bar_type { * @fixed_size: the fixed size, only applicable if type is BAR_FIXED_MASK. * @only_64bit: if true, an EPF driver is not allowed to choose if this BAR * should be configured as 32-bit or 64-bit, the EPF driver must - * configure this BAR as 64-bit. Additionally, the BAR succeeding - * this BAR must be set to type BAR_RESERVED. + * configure this BAR as 64-bit. * * only_64bit should not be set on a BAR of type BAR_RESERVED. * (If BARx is a 64-bit BAR that an EPF driver is not allowed to |