OpenE2K
/
qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

pcie: pcie_cap_slot_enable_power() use correct helper 

*_by_mask() helpers shouldn't be used here (and that's the only one).
*_by_mask() helpers do shift their value argument, but in pcie.c code
we use values that are already shifted appropriately.
Happily, PCI_EXP_SLTCTL_PWR_ON is zero, so shift doesn't matter. But if
we apply same helper for PCI_EXP_SLTCTL_PWR_OFF constant it will do
wrong thing.

So, let's use instead pci_word_test_and_clear_mask() which is already
used in the file to clear PCI_EXP_SLTCTL_PWR_OFF bit in
pcie_cap_slot_init() and pcie_cap_slot_reset().

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Anton Kuchin <antonkuchin@yandex-team.ru>
Message-Id: <20230216180356.156832-11-vsementsov@yandex-team.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2023-02-16 21:03:48 +03:00 committed by Michael S. Tsirkin
parent 6b72b84d08
commit f90d932094
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
hw/pci/pcie.c
View File

@ -373,8 +373,8 @@ void pcie_cap_slot_enable_power(PCIDevice *dev)
uint32_t sltcap = pci_get_long(exp_cap + PCI_EXP_SLTCAP);
if (sltcap & PCI_EXP_SLTCAP_PCP) {
pci_set_word_by_mask(exp_cap + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PCC, PCI_EXP_SLTCTL_PWR_ON);
pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PCC);
}
}