bcm53xx: replace iproc regression fix with the final one

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@48518 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 73 insertions, 51 deletions

diff --git a/target/linux/bcm53xx/patches-4.4/088-PCI-iproc-Fix-BCMA-PCIe-bus-scanning-regression.patch b/target/linux/bcm53xx/patches-4.4/088-PCI-iproc-Fix-BCMA-PCIe-bus-scanning-regression.patch
new file mode 100644
index 0000000000..d35287f725
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/088-PCI-iproc-Fix-BCMA-PCIe-bus-scanning-regression.patch
@@ -0,0 +1,73 @@
+From c43e4b52cbf2267047f67c9f65de18ee1ab8bfa2 Mon Sep 17 00:00:00 2001
+From: Ray Jui <rjui@broadcom.com>
+Date: Wed, 27 Jan 2016 16:52:24 -0600
+Subject: [PATCH] PCI: iproc: Fix BCMA PCIe bus scanning regression
+
+Commit 943ebae781f5 ("PCI: iproc: Add PAXC interface support") causes
+regression on EP device detection on BCMA based platforms.
+
+Fix the issue by allowing multiple devices to be configured on the same
+bus, for all PAXB based child buses.  In addition, add a check to prevent
+non-zero function from being used on bus 0 (root bus).
+
+Fixes: 943ebae781f5 ("PCI: iproc: Add PAXC interface support")
+Reported-by: Rafal Milecki <zajec5@gmail.com>
+Signed-off-by: Ray Jui <rjui@broadcom.com>
+Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
+---
+ drivers/pci/host/pcie-iproc.c | 28 +++++++++++-----------------
+ 1 file changed, 11 insertions(+), 17 deletions(-)
+
+--- a/drivers/pci/host/pcie-iproc.c
++++ b/drivers/pci/host/pcie-iproc.c
+@@ -170,20 +170,6 @@ static inline void iproc_pcie_ob_write(s
+ 	writel(val, pcie->base + offset + (window * 8));
+ }
+ 
+-static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie,
+-					      unsigned int slot,
+-					      unsigned int fn)
+-{
+-	if (slot > 0)
+-		return false;
+-
+-	/* PAXC can only support limited number of functions */
+-	if (pcie->type == IPROC_PCIE_PAXC && fn >= MAX_NUM_PAXC_PF)
+-		return false;
+-
+-	return true;
+-}
+-
+ /**
+  * Note access to the configuration registers are protected at the higher layer
+  * by 'pci_lock' in drivers/pci/access.c
+@@ -199,11 +185,11 @@ static void __iomem *iproc_pcie_map_cfg_
+ 	u32 val;
+ 	u16 offset;
+ 
+-	if (!iproc_pcie_device_is_valid(pcie, slot, fn))
+-		return NULL;
+-
+ 	/* root complex access */
+ 	if (busno == 0) {
++		if (slot > 0 || fn > 0)
++			return NULL;
++
+ 		iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
+ 				     where & CFG_IND_ADDR_MASK);
+ 		offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
+@@ -213,6 +199,14 @@ static void __iomem *iproc_pcie_map_cfg_
+ 			return (pcie->base + offset);
+ 	}
+ 
++	/*
++	 * PAXC is connected to an internally emulated EP within the SoC.  It
++	 * allows only one device and supports a limited number of functions.
++	 */
++	if (pcie->type == IPROC_PCIE_PAXC)
++		if (slot > 0 || fn >= MAX_NUM_PAXC_PF)
++			return NULL;
++
+ 	/* EP device access */
+ 	val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
+ 		(slot << CFG_ADDR_DEV_NUM_SHIFT) |
diff --git a/target/linux/bcm53xx/patches-4.4/180-PCI-iproc-Fix-BCMA-PCIe-bus-scanning-regression.patch b/target/linux/bcm53xx/patches-4.4/180-PCI-iproc-Fix-BCMA-PCIe-bus-scanning-regression.patch
deleted file mode 100644
index 21c7716846..0000000000
--- a/target/linux/bcm53xx/patches-4.4/180-PCI-iproc-Fix-BCMA-PCIe-bus-scanning-regression.patch
+++ /dev/null
@@ -1,51 +0,0 @@
-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 */