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From patchwork Wed Jan 20 22:55:10 2016
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: PCI: iproc: Fix BCMA PCIe bus scanning regression
From: Ray Jui <rjui@broadcom.com>
X-Patchwork-Id: 570953
Message-Id: <1453330510-21926-1-git-send-email-rjui@broadcom.com>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Rafal Milecki <zajec5@gmail.com>, Hante Meuleman <meuleman@broadcom.com>,
Hauke Mehrtens <hauke@hauke-m.de>, <linux-kernel@vger.kernel.org>,
<bcm-kernel-feedback-list@broadcom.com>,
<linux-pci@vger.kernel.org>, Ray Jui <rjui@broadcom.com>
Date: Wed, 20 Jan 2016 14:55:10 -0800
Commit 943ebae781f5 ("PCI: iproc: Add PAXC interface support") causes
regression on EP device detection on BCMA based platforms. This patch
fixes the issue by allowing multiple devices to be configured on the
same bus, for all PAXB based child buses
Reported-by: Rafal Milecki <zajec5@gmail.com>
Fixes: 943ebae781f5 ("PCI: iproc: Add PAXC interface support")
Signed-off-by: Ray Jui <rjui@broadcom.com>
---
drivers/pci/host/pcie-iproc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/pci/host/pcie-iproc.c
+++ b/drivers/pci/host/pcie-iproc.c
@@ -171,10 +171,11 @@ static inline void iproc_pcie_ob_write(s
}
static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
+ unsigned int busnum,
unsigned int slot,
unsigned int fn)
{
- if (slot > 0)
+ if ((pcie->type == IPROC_PCIE_PAXC || busnum == 0) && slot > 0)
return false;
/* PAXC can only support limited number of functions */
@@ -199,7 +200,7 @@ static void __iomem *iproc_pcie_map_cfg_
u32 val;
u16 offset;
- if (!iproc_pcie_device_is_valid(pcie, slot, fn))
+ if (!iproc_pcie_device_is_valid(pcie, busno, slot, fn))
return NULL;
/* root complex access */
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