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linux-stable/drivers/pci
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Pali Rohár 02bcec3ea5 PCI: aardvark: Increase polling delay to 1.5s while waiting for PIO response 
Measurements in different conditions showed that aardvark hardware PIO
response can take up to 1.44s. Increase wait timeout from 1ms to 1.5s to
ensure that we do not miss responses from hardware. After 1.44s hardware
returns errors (e.g. Completer abort).

The previous two patches fixed checking for PIO status, so now we can use
it to also catch errors which are reported by hardware after 1.44s.

After applying this patch, kernel can detect and print PIO errors to dmesg:

    [    6.879999] advk-pcie d0070000.pcie: Non-posted PIO Response Status: CA, 0xe00 @ 0x100004
    [    6.896436] advk-pcie d0070000.pcie: Posted PIO Response Status: COMP_ERR, 0x804 @ 0x100004
    [    6.913049] advk-pcie d0070000.pcie: Posted PIO Response Status: COMP_ERR, 0x804 @ 0x100010
    [    6.929663] advk-pcie d0070000.pcie: Non-posted PIO Response Status: CA, 0xe00 @ 0x100010
    [    6.953558] advk-pcie d0070000.pcie: Posted PIO Response Status: COMP_ERR, 0x804 @ 0x100014
    [    6.970170] advk-pcie d0070000.pcie: Non-posted PIO Response Status: CA, 0xe00 @ 0x100014
    [    6.994328] advk-pcie d0070000.pcie: Posted PIO Response Status: COMP_ERR, 0x804 @ 0x100004

Without this patch kernel prints only a generic error to dmesg:

    [    5.246847] advk-pcie d0070000.pcie: config read/write timed out

Link: https://lore.kernel.org/r/20210722144041.12661-3-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Marek Behún <kabel@kernel.org>
Cc: stable@vger.kernel.org # 7fbcb5da81 ("PCI: aardvark: Don't rely on jiffies while holding spinlock")
2021-08-05 10:51:49 +01:00
..
controller PCI: aardvark: Increase polling delay to 1.5s while waiting for PIO response 2021-08-05 10:51:49 +01:00
endpoint Merge branch 'remotes/lorenzo/pci/endpoint' 2021-05-04 10:43:27 -05:00
hotplug Merge branch 'pci/kernel-doc' 2021-07-06 10:56:29 -05:00
pcie Merge branch 'pci/sysfs' 2021-07-06 10:56:25 -05:00
switch PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions 2021-06-03 22:14:47 -05:00
access.c Merge branch 'pci/misc' 2020-08-05 18:24:16 -05:00
ats.c PCI: Fix kernel-doc errors 2021-03-11 17:37:20 -06:00
bus.c PCI: Add device even if driver attach failed 2020-07-07 17:33:41 -05:00
ecam.c PCI: Dynamically map ECAM regions 2021-06-16 17:20:40 -05:00
host-bridge.c
iov.c Merge branch 'pci/virtualization' 2021-07-06 10:56:26 -05:00
irq.c PCI: Remove unused pci_lost_interrupt() 2020-07-29 14:25:18 -05:00
Kconfig pci-v5.10-changes 2020-10-22 12:41:00 -07:00
Makefile PCI: Apply CONFIG_PCI_DEBUG to entire drivers/pci hierarchy 2021-02-09 15:10:20 -06:00
mmap.c
msi.c PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions 2021-06-03 22:14:47 -05:00
of.c pci-v5.13-fixes-2 2021-06-18 13:54:11 -07:00
p2pdma.c Merge branch 'pci/sysfs' 2021-07-06 10:56:25 -05:00
pci-acpi.c PCI/ACPI: Fix acpi_pci_set_power_state() debug message 2021-04-01 14:54:43 -05:00
pci-bridge-emul.c PCI: pci-bridge-emul: Fix array overruns, improve safety 2021-02-17 17:25:31 -06:00
pci-bridge-emul.h
pci-driver.c PCI: Add support for dev_groups to struct pci_driver 2021-05-19 23:50:27 -04:00
pci-label.c PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions 2021-06-03 22:14:47 -05:00
pci-mid.c PCI: intel-mid: Convert to new X86 CPU match macros 2020-03-24 21:35:06 +01:00
pci-pf-stub.c PCI/IOV: Simplify pci-pf-stub with module_pci_driver() 2020-09-17 12:40:20 -05:00
pci-stub.c
pci-sysfs.c PCI/sysfs: Add 'devspec' newline 2021-06-04 09:21:07 -05:00
pci.c pci-v5.14-changes 2021-07-08 12:06:20 -07:00
pci.h Merge branch 'pci/kernel-doc' 2021-07-06 10:56:29 -05:00
probe.c Revert "PCI: Coalesce host bridge contiguous apertures" 2021-07-09 18:51:46 -05:00
proc.c PCI: Revoke mappings like devmem 2021-02-11 15:59:19 +01:00
quirks.c pci-v5.14-changes 2021-07-08 12:06:20 -07:00
remove.c PCI/sysfs: Convert "reset" to static attribute 2021-04-27 17:53:20 -05:00
rom.c PCI: Use ioremap(), not phys_to_virt() for platform ROM 2020-03-30 09:52:23 -05:00
search.c PCI: Remove WARN_ON(in_interrupt()) 2021-02-10 16:46:29 -06:00
setup-bus.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
setup-irq.c
setup-res.c PCI: Decline to resize resources if boot config must be preserved 2021-01-12 16:39:52 -06:00
slot.c PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions 2021-06-03 22:14:47 -05:00
syscall.c PCI: Align checking of syscall user config accessors 2021-01-27 10:41:59 -06:00
vc.c PCI: Fix kerneldoc warnings 2020-08-05 18:23:14 -05:00
vpd.c Merge branch 'pci/sysfs' 2021-05-04 10:43:23 -05:00
xen-pcifront.c swiotlb: remove swiotlb_nr_tbl 2021-03-19 04:58:25 +00:00