diff options
Diffstat (limited to 'target/linux/oxnas/patches-5.4/001-irqchip-versatile-fpga-Handle-chained-IRQs-properly.patch')
| -rw-r--r-- | target/linux/oxnas/patches-5.4/001-irqchip-versatile-fpga-Handle-chained-IRQs-properly.patch | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/target/linux/oxnas/patches-5.4/001-irqchip-versatile-fpga-Handle-chained-IRQs-properly.patch b/target/linux/oxnas/patches-5.4/001-irqchip-versatile-fpga-Handle-chained-IRQs-properly.patch deleted file mode 100644 index f4285aadd0..0000000000 --- a/target/linux/oxnas/patches-5.4/001-irqchip-versatile-fpga-Handle-chained-IRQs-properly.patch +++ /dev/null @@ -1,77 +0,0 @@ -From patchwork Thu Mar 19 02:34:48 2020 -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -X-Patchwork-Submitter: Sungbo Eo <mans0n@gorani.run> -X-Patchwork-Id: 11446405 -From: Sungbo Eo <mans0n@gorani.run> -To: Linus Walleij <linus.walleij@linaro.org>, - Thomas Gleixner <tglx@linutronix.de>, Jason Cooper <jason@lakedaemon.net>, - Marc Zyngier <maz@kernel.org>, linux-arm-kernel@lists.infradead.org, - linux-kernel@vger.kernel.org, linux-oxnas@groups.io -Subject: [PATCH v2] irqchip/versatile-fpga: Handle chained IRQs properly -Date: Thu, 19 Mar 2020 11:34:48 +0900 -Message-Id: <20200319023448.1479701-1-mans0n@gorani.run> -In-Reply-To: <002b72cab9896fa5ac76a52e0cb503ff@kernel.org> -References: <002b72cab9896fa5ac76a52e0cb503ff@kernel.org> -MIME-Version: 1.0 -List-Id: <linux-arm-kernel.lists.infradead.org> -Cc: Sungbo Eo <mans0n@gorani.run>, Neil Armstrong <narmstrong@baylibre.com> -Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> - -Enclose the chained handler with chained_irq_{enter,exit}(), so that the -muxed interrupts get properly acked. - -This patch also fixes a reboot bug on OX820 SoC, where the jiffies timer -interrupt is never acked. The kernel waits a clock tick forever in -calibrate_delay_converge(), which leads to a boot hang. - -Fixes: c41b16f8c9d9 ("ARM: integrator/versatile: consolidate FPGA IRQ handling code") -Signed-off-by: Sungbo Eo <mans0n@gorani.run> -Cc: Neil Armstrong <narmstrong@baylibre.com> ---- -v2: moved readl below chained_irq_enter() - added Fixes tag - - drivers/irqchip/irq-versatile-fpga.c | 12 ++++++++++-- - 1 file changed, 10 insertions(+), 2 deletions(-) - ---- a/drivers/irqchip/irq-versatile-fpga.c -+++ b/drivers/irqchip/irq-versatile-fpga.c -@@ -6,6 +6,7 @@ - #include <linux/irq.h> - #include <linux/io.h> - #include <linux/irqchip.h> -+#include <linux/irqchip/chained_irq.h> - #include <linux/irqchip/versatile-fpga.h> - #include <linux/irqdomain.h> - #include <linux/module.h> -@@ -68,12 +69,16 @@ static void fpga_irq_unmask(struct irq_d - - static void fpga_irq_handle(struct irq_desc *desc) - { -+ struct irq_chip *chip = irq_desc_get_chip(desc); - struct fpga_irq_data *f = irq_desc_get_handler_data(desc); -- u32 status = readl(f->base + IRQ_STATUS); -+ u32 status; - -+ chained_irq_enter(chip, desc); -+ -+ status = readl(f->base + IRQ_STATUS); - if (status == 0) { - do_bad_IRQ(desc); -- return; -+ goto out; - } - - do { -@@ -82,6 +87,9 @@ static void fpga_irq_handle(struct irq_d - status &= ~(1 << irq); - generic_handle_irq(irq_find_mapping(f->domain, irq)); - } while (status); -+ -+out: -+ chained_irq_exit(chip, desc); - } - - /* |