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pci: Avoid assigning PCI resources that are below 0x1000

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commit b7598a43f2 ("[PATCH] Avoid assigning PCI resources from
zero address") only moved the bus lower address to 0x1000 if the
given bus start address is zero. The comment said 0x1000 is a
reasonable starting value, hence we'd better apply the same
adjustment when the given bus start address is below 0x1000.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Bin Meng 2019-06-05 07:26:44 -07:00 committed by Tom Rini
parent d5e994fc55
commit 5fafd7e35f
1 changed files with 3 additions and 2 deletions
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5
drivers/pci/pci_auto_common.c
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@ -21,9 +21,10 @@ void pciauto_region_init(struct pci_region *res)
/*
* Avoid allocating PCI resources from address 0 -- this is illegal
* according to PCI 2.1 and moreover, this is known to cause Linux IDE
* drivers to fail. Use a reasonable starting value of 0x1000 instead.
* drivers to fail. Use a reasonable starting value of 0x1000 instead
* if the bus start address is below 0x1000.
*/
res->bus_lower = res->bus_start ? res->bus_start : 0x1000;
res->bus_lower = res->bus_start < 0x1000 ? 0x1000 : res->bus_start;
}
void pciauto_region_align(struct pci_region *res, pci_size_t size)