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From: Jiaxun Yang <jiaxun.yang@flygoat.com>
To: linux-mips@vger.kernel.org
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Rob Herring <robh+dt@kernel.org>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Huacai Chen <chenhc@lemote.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Andrew Murray <amurray@thegoodpenguin.co.uk>,
	Paul Burton <paulburton@kernel.org>,
	linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/5] PCI: OF: Don't remap iospace on unsupported platform
Date: Mon, 30 Mar 2020 19:42:26 +0800	[thread overview]
Message-ID: <20200330114239.1112759-2-jiaxun.yang@flygoat.com> (raw)
In-Reply-To: <20200330114239.1112759-1-jiaxun.yang@flygoat.com>

There are some platforms doesn't support iospace remapping
like MIPS. However, our PCI code will try to remap iospace
unconditionally and reject io resources on these platforms.

So we should remove iospace remapping check and use a range
check instead on these platforms.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 drivers/pci/of.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index 81ceeaa6f1d5..36e8761b66c6 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -547,12 +547,21 @@ int pci_parse_request_of_pci_ranges(struct device *dev,
 
 		switch (resource_type(res)) {
 		case IORESOURCE_IO:
+#if defined(PCI_IOBASE) && defined(CONFIG_MMU)
 			err = devm_pci_remap_iospace(dev, res, iobase);
 			if (err) {
 				dev_warn(dev, "error %d: failed to map resource %pR\n",
 					 err, res);
 				resource_list_destroy_entry(win);
 			}
+#else
+			/* Simply check if IO is inside the range */
+			if (res->end > IO_SPACE_LIMIT) {
+				dev_warn(dev, "resource %pR out of the IO range\n",
+					res);
+				resource_list_destroy_entry(win);
+			}
+#endif
 			break;
 		case IORESOURCE_MEM:
 			res_valid |= !(res->flags & IORESOURCE_PREFETCH);
-- 
2.26.0.rc2



  reply	other threads:[~2020-03-30 11:44 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-30 11:42 [PATCH 0/5] Loongson64 Generic PCI driver Jiaxun Yang
2020-03-30 11:42 ` Jiaxun Yang [this message]
2020-03-30 11:42 ` [PATCH 2/5] PCI: Add Loongson PCI Controller support Jiaxun Yang
2020-03-30 22:08   ` Rob Herring
2020-03-30 11:42 ` [PATCH 3/5] dt-bindings: Document Loongson PCI Host Controller Jiaxun Yang
2020-03-30 15:40   ` Sergei Shtylyov
2020-03-30 15:45   ` Rob Herring
2020-03-30 11:42 ` [PATCH 4/5] MIPS: DTS: Loongson64: Add PCI Controller Node Jiaxun Yang
2020-03-30 15:37   ` Sergei Shtylyov
2020-03-30 15:47     ` Jiaxun Yang
2020-03-30 11:42 ` [PATCH 5/5] MIPS: Loongson64: Switch to generic PCI driver Jiaxun Yang
2020-04-01  3:06 ` [PATCH v2 0/5] Loongson64 Generic PCI driver v2 Jiaxun Yang
2020-04-01  3:06   ` [PATCH v2 1/5] PCI: OF: Don't remap iospace on unsupported platform Jiaxun Yang
2020-04-01  3:06   ` [PATCH v2 2/5] PCI: Add Loongson PCI Controller support Jiaxun Yang
2020-04-01  3:06   ` [PATCH v2 3/5] dt-bindings: Document Loongson PCI Host Controller Jiaxun Yang
2020-04-01 14:18     ` Rob Herring
2020-04-01  3:06   ` [PATCH v2 4/5] MIPS: DTS: Loongson64: Add PCI Controller Node Jiaxun Yang
2020-04-01  3:06   ` [PATCH v2 5/5] MIPS: Loongson64: Switch to generic PCI driver Jiaxun Yang
2020-04-13  5:32 ` [PATCH v3 1/5] PCI: OF: Don't remap iospace on unsupported platform Jiaxun Yang
2020-04-13  5:32   ` [PATCH v3 2/5] PCI: Add Loongson PCI Controller support Jiaxun Yang
2020-04-13  5:32   ` [PATCH v3 3/5] dt-bindings: Document Loongson PCI Host Controller Jiaxun Yang
2020-04-13  5:32   ` [PATCH v3 4/5] MIPS: DTS: Loongson64: Add PCI Controller Node Jiaxun Yang
2020-04-13  5:32   ` [PATCH v3 5/5] MIPS: Loongson64: Switch to generic PCI driver Jiaxun Yang
2020-04-13  9:31   ` [PATCH v3 1/5] PCI: OF: Don't remap iospace on unsupported platform Sergei Shtylyov
2020-04-20  7:12 ` [PATCH v4 " Jiaxun Yang
2020-04-20  7:12   ` [PATCH v4 2/5] PCI: Add Loongson PCI Controller support Jiaxun Yang
2020-04-20  7:12   ` [PATCH v4 3/5] dt-bindings: Document Loongson PCI Host Controller Jiaxun Yang
2020-04-20  7:12   ` [PATCH v4 4/5] MIPS: DTS: Loongson64: Add PCI Controller Node Jiaxun Yang
2020-04-20  7:12   ` [PATCH v4 5/5] MIPS: Loongson64: Switch to generic PCI driver Jiaxun Yang
2020-04-20  9:38   ` [PATCH v4 1/5] PCI: OF: Don't remap iospace on unsupported platform Sergei Shtylyov

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