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@@ -1,77 +0,0 @@
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-From patchwork Thu Mar 19 02:34:48 2020
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-Content-Type: text/plain; charset="utf-8"
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-MIME-Version: 1.0
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-Content-Transfer-Encoding: 7bit
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-X-Patchwork-Submitter: Sungbo Eo <[email protected]>
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-X-Patchwork-Id: 11446405
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-From: Sungbo Eo <[email protected]>
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-To: Linus Walleij <[email protected]>,
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- Thomas Gleixner <[email protected]>, Jason Cooper <[email protected]>,
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- Marc Zyngier <[email protected]>, [email protected],
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- [email protected], [email protected]
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-Subject: [PATCH v2] irqchip/versatile-fpga: Handle chained IRQs properly
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-Date: Thu, 19 Mar 2020 11:34:48 +0900
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-Message-Id: <[email protected]>
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-In-Reply-To: <[email protected]>
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-References: <[email protected]>
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-MIME-Version: 1.0
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-List-Id: <linux-arm-kernel.lists.infradead.org>
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-Cc: Sungbo Eo <[email protected]>, Neil Armstrong <[email protected]>
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-Sender: "linux-arm-kernel" <[email protected]>
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-
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-Enclose the chained handler with chained_irq_{enter,exit}(), so that the
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-muxed interrupts get properly acked.
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-
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-This patch also fixes a reboot bug on OX820 SoC, where the jiffies timer
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-interrupt is never acked. The kernel waits a clock tick forever in
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-calibrate_delay_converge(), which leads to a boot hang.
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-
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-Fixes: c41b16f8c9d9 ("ARM: integrator/versatile: consolidate FPGA IRQ handling code")
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-Signed-off-by: Sungbo Eo <[email protected]>
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-Cc: Neil Armstrong <[email protected]>
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----
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-v2: moved readl below chained_irq_enter()
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- added Fixes tag
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-
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- drivers/irqchip/irq-versatile-fpga.c | 12 ++++++++++--
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- 1 file changed, 10 insertions(+), 2 deletions(-)
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-
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---- a/drivers/irqchip/irq-versatile-fpga.c
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-+++ b/drivers/irqchip/irq-versatile-fpga.c
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-@@ -6,6 +6,7 @@
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- #include <linux/irq.h>
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- #include <linux/io.h>
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- #include <linux/irqchip.h>
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-+#include <linux/irqchip/chained_irq.h>
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- #include <linux/irqchip/versatile-fpga.h>
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- #include <linux/irqdomain.h>
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- #include <linux/module.h>
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-@@ -68,12 +69,16 @@ static void fpga_irq_unmask(struct irq_d
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-
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- static void fpga_irq_handle(struct irq_desc *desc)
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- {
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-+ struct irq_chip *chip = irq_desc_get_chip(desc);
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- struct fpga_irq_data *f = irq_desc_get_handler_data(desc);
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-- u32 status = readl(f->base + IRQ_STATUS);
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-+ u32 status;
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-
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-+ chained_irq_enter(chip, desc);
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-+
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-+ status = readl(f->base + IRQ_STATUS);
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- if (status == 0) {
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- do_bad_IRQ(desc);
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-- return;
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-+ goto out;
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- }
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-
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- do {
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-@@ -82,6 +87,9 @@ static void fpga_irq_handle(struct irq_d
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- status &= ~(1 << irq);
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- generic_handle_irq(irq_find_mapping(f->domain, irq));
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- } while (status);
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-+
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-+out:
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-+ chained_irq_exit(chip, desc);
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- }
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-
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- /*
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