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- 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
- SSB_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;
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