linux-kernel - [PATCH 5.15 052/262] PCI: rcar: Check if device is runtime suspended instead of __clk_is

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Date:   Mon,  7 Mar 2022 10:16:36 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Randy Dunlap <rdunlap@...radead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        linux-renesas-soc@...r.kernel.org, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 052/262] PCI: rcar: Check if device is runtime suspended instead of __clk_is_enabled()

From: Marek Vasut <marek.vasut+renesas@...il.com>

[ Upstream commit d2a14b54989e9ccea8401895fdfbc213bd1f56af ]

Replace __clk_is_enabled() with pm_runtime_suspended(),
as __clk_is_enabled() was checking the wrong bus clock
and caused the following build error too:
  arm-linux-gnueabi-ld: drivers/pci/controller/pcie-rcar-host.o: in function `rcar_pcie_aarch32_abort_handler':
  pcie-rcar-host.c:(.text+0xdd0): undefined reference to `__clk_is_enabled'

Link: https://lore.kernel.org/r/20211115204641.12941-1-marek.vasut@gmail.com
Fixes: a115b1bd3af0 ("PCI: rcar: Add L1 link state fix into data abort hook")
Signed-off-by: Marek Vasut <marek.vasut+renesas@...il.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
Acked-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Stephen Boyd <sboyd@...nel.org>
Cc: Wolfram Sang <wsa@...-dreams.de>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Cc: linux-renesas-soc@...r.kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pci/controller/pcie-rcar-host.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c
index 8f3131844e777..bfb13f358d073 100644
--- a/drivers/pci/controller/pcie-rcar-host.c
+++ b/drivers/pci/controller/pcie-rcar-host.c
@@ -52,10 +52,10 @@ struct rcar_msi {
  */
 static void __iomem *pcie_base;
 /*
- * Static copy of bus clock pointer, so we can check whether the clock
- * is enabled or not.
+ * Static copy of PCIe device pointer, so we can check whether the
+ * device is runtime suspended or not.
  */
-static struct clk *pcie_bus_clk;
+static struct device *pcie_dev;
 #endif
 
 /* Structure representing the PCIe interface */
@@ -794,7 +794,7 @@ static int rcar_pcie_get_resources(struct rcar_pcie_host *host)
 #ifdef CONFIG_ARM
 	/* Cache static copy for L1 link state fixup hook on aarch32 */
 	pcie_base = pcie->base;
-	pcie_bus_clk = host->bus_clk;
+	pcie_dev = pcie->dev;
 #endif
 
 	return 0;
@@ -1064,7 +1064,7 @@ static int rcar_pcie_aarch32_abort_handler(unsigned long addr,
 
 	spin_lock_irqsave(&pmsr_lock, flags);
 
-	if (!pcie_base || !__clk_is_enabled(pcie_bus_clk)) {
+	if (!pcie_base || pm_runtime_suspended(pcie_dev)) {
 		ret = 1;
 		goto unlock_exit;
 	}
-- 
2.34.1