leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

PCI: tegra194: Clear bandwidth management status

Browse Source 
In the event of a bandwidth management interrupt, clear the bandwidth
management status in the configuration space also along with clearing
corresponding status in the application logic register to avoid slew
of interrupts.

Link: https://lore.kernel.org/r/20220721142052.25971-12-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Vidya Sagar 2022-07-21 19:50:47 +05:30 committed by Bjorn Helgaas
parent 6646e99bce
commit 6c12e3e139
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/pci/controller/dwc/pcie-tegra194.c
View File

@ -370,6 +370,12 @@ static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg)
apply_bad_link_workaround(pp);
}
if (status_l1 & APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS) {
val_w = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base +
PCI_EXP_LNKSTA);
val_w |= PCI_EXP_LNKSTA_LBMS;
dw_pcie_writew_dbi(pci, pcie->pcie_cap_base +
PCI_EXP_LNKSTA, val_w);
appl_writel(pcie,
APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS,
APPL_INTR_STATUS_L1_8_0);