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PCI/DPC: Remove rp_pio_status from dpc struct 

We don't need to save the rp pio status across multiple contexts as all
DPC event handling occurs in a single work queue context.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Sinan Kaya <okaya@kernel.org>
Reviewed-by: Oza Pawandeep <poza@codeaurora.org>
This commit is contained in:
Keith Busch 2018-07-16 17:05:03 -05:00 committed by Bjorn Helgaas
parent 0c27e28f77
commit f1d16b1756
1 changed files with 5 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/pci/pcie/dpc.c
View File

@ -19,7 +19,6 @@ struct dpc_dev {
struct work_struct work;
u16 cap_pos;
bool rp_extensions;
u32 rp_pio_status;
u8 rp_log_size;
};
@ -96,11 +95,6 @@ static pci_ers_result_t dpc_reset_link(struct pci_dev *pdev)
if (dpc->rp_extensions && dpc_wait_rp_inactive(dpc))
return PCI_ERS_RESULT_DISCONNECT;
if (dpc->rp_extensions && dpc->rp_pio_status) {
pci_write_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS,
dpc->rp_pio_status);
dpc->rp_pio_status = 0;
}
pci_write_config_word(pdev, cap + PCI_EXP_DPC_STATUS,
PCI_EXP_DPC_STATUS_TRIGGER);
@ -122,8 +116,6 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
dev_err(dev, "rp_pio_status: %#010x, rp_pio_mask: %#010x\n",
status, mask);
dpc->rp_pio_status = status;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_SEVERITY, &sev);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_SYSERROR, &syserr);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_EXCEPTION, &exc);
@ -134,15 +126,14 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &dpc_status);
first_error = (dpc_status & 0x1f00) >> 8;
status &= ~mask;
for (i = 0; i < ARRAY_SIZE(rp_pio_error_string); i++) {
if (status & (1 << i))
if ((status & ~mask) & (1 << i))
dev_err(dev, "[%2d] %s%s\n", i, rp_pio_error_string[i],
first_error == i ? " (First)" : "");
}
if (dpc->rp_log_size < 4)
return;
goto clear_status;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG,
&dw0);
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_HEADER_LOG + 4,
@ -155,7 +146,7 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
dw0, dw1, dw2, dw3);
if (dpc->rp_log_size < 5)
return;
goto clear_status;
pci_read_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_IMPSPEC_LOG, &log);
dev_err(dev, "RP PIO ImpSpec Log %#010x\n", log);
@ -164,6 +155,8 @@ static void dpc_process_rp_pio_error(struct dpc_dev *dpc)
cap + PCI_EXP_DPC_RP_PIO_TLPPREFIX_LOG, &prefix);
dev_err(dev, "TLP Prefix Header: dw%d, %#010x\n", i, prefix);
}
clear_status:
pci_write_config_dword(pdev, cap + PCI_EXP_DPC_RP_PIO_STATUS, status);
}
static void dpc_work(struct work_struct *work)