kernel: bump 4.9 to 4.9.155
Refreshed all patches. Remove upstreamed: - 100-arm-cns3xxx-fix-writing-to-wrong-PCI-registers-after.patch Altered patches: - 721-phy_packets.patch Compile-tested on: ar7 Runtime-tested on: none Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>v19.07.3_mercusys_ac12_duma
Koen Vandeputte
5 years ago
parent
4c20c6fa94
commit
34e80b5d3b
@ -1,74 +0,0 @@
|
||||
From 03556dab1cb02d85b50d7be3ee3a3bac001f5991 Mon Sep 17 00:00:00 2001
|
||||
From: Koen Vandeputte <koen.vandeputte@ncentric.com>
|
||||
Date: Tue, 18 Dec 2018 12:14:06 +0100
|
||||
Subject: [PATCH] arm: cns3xxx: fix writing to wrong PCI registers after
|
||||
alignment
|
||||
|
||||
Originally, cns3xxx used it's own functions for mapping, reading and writing registers.
|
||||
|
||||
Commit 802b7c06adc7 ("ARM: cns3xxx: Convert PCI to use generic config accessors")
|
||||
removed the internal PCI config write function in favor of the generic one:
|
||||
|
||||
cns3xxx_pci_write_config() --> pci_generic_config_write()
|
||||
|
||||
cns3xxx_pci_write_config() expected aligned addresses, being produced by cns3xxx_pci_map_bus()
|
||||
while the generic one pci_generic_config_write() actually expects the real address
|
||||
as both the function and hardware are capable of byte-aligned writes.
|
||||
|
||||
This currently leads to pci_generic_config_write() writing
|
||||
to the wrong registers on some ocasions.
|
||||
|
||||
First issue seen due to this:
|
||||
|
||||
- driver ath9k gets loaded
|
||||
- The driver wants to write value 0xA8 to register PCI_LATENCY_TIMER, located at 0x0D
|
||||
- cns3xxx_pci_map_bus() aligns the address to 0x0C
|
||||
- pci_generic_config_write() effectively writes 0xA8 into register 0x0C (CACHE_LINE_SIZE)
|
||||
|
||||
This seems to cause some slight instability when certain PCI devices are used.
|
||||
|
||||
Another issue example caused by this this is the PCI bus numbering,
|
||||
where the primary bus is higher than the secondary, which is impossible.
|
||||
|
||||
Before:
|
||||
|
||||
00:00.0 PCI bridge: Cavium, Inc. Device 3400 (rev 01) (prog-if 00 [Normal decode])
|
||||
Flags: bus master, fast devsel, latency 0, IRQ 255
|
||||
Bus: primary=02, secondary=01, subordinate=ff, sec-latency=0
|
||||
|
||||
After fix:
|
||||
|
||||
00:00.0 PCI bridge: Cavium, Inc. Device 3400 (rev 01) (prog-if 00 [Normal decode])
|
||||
Flags: bus master, fast devsel, latency 0, IRQ 255
|
||||
Bus: primary=00, secondary=01, subordinate=02, sec-latency=0
|
||||
|
||||
And very likely some more ..
|
||||
|
||||
Fix all by omitting the alignment being done in the mapping function.
|
||||
|
||||
Fixes: 802b7c06adc7 ("ARM: cns3xxx: Convert PCI to use generic config accessors")
|
||||
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
|
||||
CC: Arnd Bergmann <arnd@arndb.de>
|
||||
CC: Bjorn Helgaas <bhelgaas@google.com>
|
||||
CC: Krzysztof Halasa <khalasa@piap.pl>
|
||||
CC: Olof Johansson <olof@lixom.net>
|
||||
CC: Robin Leblon <robin.leblon@ncentric.com>
|
||||
CC: Rob Herring <robh@kernel.org>
|
||||
CC: Russell King <linux@armlinux.org.uk>
|
||||
CC: Tim Harvey <tharvey@gateworks.com>
|
||||
CC: stable@vger.kernel.org # v4.0+
|
||||
---
|
||||
arch/arm/mach-cns3xxx/pcie.c | 2 +-
|
||||
1 file changed, 1 insertion(+), 1 deletion(-)
|
||||
|
||||
--- a/arch/arm/mach-cns3xxx/pcie.c
|
||||
+++ b/arch/arm/mach-cns3xxx/pcie.c
|
||||
@@ -83,7 +83,7 @@ static void __iomem *cns3xxx_pci_map_bus
|
||||
} else /* remote PCI bus */
|
||||
base = cnspci->cfg1_regs + ((busno & 0xf) << 20);
|
||||
|
||||
- return base + (where & 0xffc) + (devfn << 12);
|
||||
+ return base + where + (devfn << 12);
|
||||
}
|
||||
|
||||
static int cns3xxx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
|
||||
Loading…
Reference in New Issue