From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mathieu Poirier Subject: [BACKPORT 4.14.y 02/18] PCI: dra7xx: Fix legacy INTD IRQ handling Date: Thu, 5 Sep 2019 10:17:43 -0600 Message-ID: <20190905161759.28036-3-mathieu.poirier@linaro.org> References: <20190905161759.28036-1-mathieu.poirier@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190905161759.28036-1-mathieu.poirier@linaro.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+gldm-linux-mtd-36=gmane.org@lists.infradead.org To: stable@vger.kernel.org Cc: linux-pm@vger.kernel.org, linux-pci@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mtd@lists.infradead.org, linux-i2c@vger.kernel.org, linux-omap@vger.kernel.org List-Id: linux-i2c@vger.kernel.org From: Vignesh R commit 524d59f6e30aab5b618da55e604c802ccd83e708 upstream Legacy INTD IRQ handling is broken on dra7xx due to fact that driver uses hwirq in range of 1-4 for INTA, INTD whereas IRQ domain is of size 4 which is numbered 0-3. Therefore when INTD IRQ line is used with pci-dra7xx driver following warning is seen: WARNING: CPU: 0 PID: 1 at kernel/irq/irqdomain.c:342 irq_domain_associate+0x12c/0x1c4 error: hwirq 0x4 is too large for dummy Fix this by using pci_irqd_intx_xlate() helper to translate the INTx 1-4 range into the 0-3 as done in other PCIe drivers. Suggested-by: Bjorn Helgaas Reported-by: Chris Welch Signed-off-by: Vignesh R Signed-off-by: Lorenzo Pieralisi Acked-by: Kishon Vijay Abraham I Signed-off-by: Mathieu Poirier --- drivers/pci/dwc/pci-dra7xx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/dwc/pci-dra7xx.c b/drivers/pci/dwc/pci-dra7xx.c index 63052c5e5f82..7f5dfa169d0f 100644 --- a/drivers/pci/dwc/pci-dra7xx.c +++ b/drivers/pci/dwc/pci-dra7xx.c @@ -227,6 +227,7 @@ static int dra7xx_pcie_intx_map(struct irq_domain *domain, unsigned int irq, static const struct irq_domain_ops intx_domain_ops = { .map = dra7xx_pcie_intx_map, + .xlate = pci_irqd_intx_xlate, }; static int dra7xx_pcie_init_irq_domain(struct pcie_port *pp) @@ -270,7 +271,7 @@ static irqreturn_t dra7xx_pcie_msi_irq_handler(int irq, void *arg) case INTC: case INTD: generic_handle_irq(irq_find_mapping(dra7xx->irq_domain, - ffs(reg))); + ffs(reg) - 1)); break; } -- 2.17.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/