blob: bf952b4c66f6aac5edb3f5905866bf42e0476d2d [file] [log] [blame]
From 09a8253b226ec6c8db875653f73328a547e86563 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marek.vasut@gmail.com>
Date: Thu, 24 May 2018 16:36:23 +0200
Subject: [PATCH 1439/1795] PCI: rcar: Remove IRQ mappings in
rcar_pcie_enable_msi() failpath
The rcar_pcie_enable_msi() creates IRQ mappings using irq_create_mapping()
before requesting the IRQs using devm_request_irq(). If devm_request_irq()
fails for some reason, rcar_pcie_enable_msi() does not remove the mapping.
Pull out the code for disposing IRQ mappings from rcar_pcie_teardown_msi()
into a separate function and call it from both rcar_pcie_teardown_msi()
and rcar_pcie_enable_msi() failpath to remove the mappings correctly.
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Phil Edworthy <phil.edworthy@renesas.com>
Cc: Simon Horman <horms+renesas@verge.net.au>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: linux-renesas-soc@vger.kernel.org
(cherry picked from commit 0bbf6b9230df602616a6c6f5861e8964e9162f4a)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
drivers/pci/host/pcie-rcar.c | 25 ++++++++++++++++---------
1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
index f5307b61d7e0..23251c6cde5c 100644
--- a/drivers/pci/host/pcie-rcar.c
+++ b/drivers/pci/host/pcie-rcar.c
@@ -869,6 +869,20 @@ static const struct irq_domain_ops msi_domain_ops = {
.map = rcar_msi_map,
};
+static void rcar_pcie_unmap_msi(struct rcar_pcie *pcie)
+{
+ struct rcar_msi *msi = &pcie->msi;
+ int i, irq;
+
+ for (i = 0; i < INT_PCI_MSI_NR; i++) {
+ irq = irq_find_mapping(msi->domain, i);
+ if (irq > 0)
+ irq_dispose_mapping(irq);
+ }
+
+ irq_domain_remove(msi->domain);
+}
+
static int rcar_pcie_enable_msi(struct rcar_pcie *pcie)
{
struct device *dev = pcie->dev;
@@ -923,14 +937,13 @@ static int rcar_pcie_enable_msi(struct rcar_pcie *pcie)
return 0;
err:
- irq_domain_remove(msi->domain);
+ rcar_pcie_unmap_msi(pcie);
return err;
}
static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie)
{
struct rcar_msi *msi = &pcie->msi;
- int irq, i;
/* Disable all MSI interrupts */
rcar_pci_write_reg(pcie, 0, PCIEMSIIER);
@@ -940,13 +953,7 @@ static void rcar_pcie_teardown_msi(struct rcar_pcie *pcie)
free_pages(msi->pages, 0);
- for (i = 0; i < INT_PCI_MSI_NR; i++) {
- irq = irq_find_mapping(msi->domain, i);
- if (irq > 0)
- irq_dispose_mapping(irq);
- }
-
- irq_domain_remove(msi->domain);
+ rcar_pcie_unmap_msi(pcie);
}
static int rcar_pcie_get_resources(struct rcar_pcie *pcie)
--
2.19.0