lkml.org 
[lkml]   [2021]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 06/22] PCI: exynos: Use SET_PCI_ERROR_RESPONSE() when device not found
Date
An MMIO read from a PCI device that doesn't exist or doesn't respond
causes a PCI error. There's no real data to return to satisfy the
CPU read, so most hardware fabricates ~0 data.

Use SET_PCI_ERROR_RESPONSE() to set the error response, when a faulty
read occurs.

This helps unify PCI error response checking and make error check
consistent and easier to find.

Compile tested only.

Signed-off-by: Naveen Naidu <naveennaidu479@gmail.com>
---
drivers/pci/controller/dwc/pci-exynos.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c
index c24dab383654..1fdbef184532 100644
--- a/drivers/pci/controller/dwc/pci-exynos.c
+++ b/drivers/pci/controller/dwc/pci-exynos.c
@@ -217,7 +217,7 @@ static int exynos_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn,
struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);

if (PCI_SLOT(devfn)) {
- *val = ~0;
+ SET_PCI_ERROR_RESPONSE(val);
return PCIBIOS_DEVICE_NOT_FOUND;
}

--
2.25.1
\
 
 \ /
  Last update: 2021-10-11 19:54    [W:0.335 / U:0.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site