diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-4.19/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-4.19/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-4.19/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch b/target/linux/brcm47xx/patches-4.19/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch new file mode 100644 index 0000000000..6b7ee06e50 --- /dev/null +++ b/target/linux/brcm47xx/patches-4.19/900-ssb-reject-PCI-writes-setting-CardBus-bridge-resourc.patch @@ -0,0 +1,30 @@ +From 5c81397a0147ea59c778d1de14ef54e2268221f6 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> +Date: Wed, 8 Apr 2015 06:58:11 +0200 +Subject: [PATCH] ssb: reject PCI writes setting CardBus bridge resources +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +If SoC has a CardBus we can set resources of device at slot 1 only. It's +impossigle to set bridge resources as it simply overwrites device 1 +configuration and usually results in Data bus error-s. + +Signed-off-by: Rafał Miłecki <zajec5@gmail.com> +--- + drivers/ssb/driver_pcicore.c | 4 ++++ + 1 file changed, 4 insertions(+) + +--- a/drivers/ssb/driver_pcicore.c ++++ b/drivers/ssb/driver_pcicore.c +@@ -164,6 +164,10 @@ static int ssb_extpci_write_config(struc + WARN_ON(!pc->hostmode); + if (unlikely(len != 1 && len != 2 && len != 4)) + goto out; ++ /* CardBus SoCs allow configuring dev 1 resources only */ ++ if (extpci_core->cardbusmode && dev != 1 && ++ off >= PCI_BASE_ADDRESS_0 && off <= PCI_BASE_ADDRESS_5) ++ goto out; + addr = get_cfgspace_addr(pc, bus, dev, func, off); + if (unlikely(!addr)) + goto out; |