This is a note to let you know that I've just added the patch titled
watchdog: qcom: Remove incorrect usage of QCOM_WDT_ENABLE_IRQ
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
watchdog-qcom-remove-incorrect-usage-of-qcom_wdt_enable_irq.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a4f3407c41605d14f09e490045d0609990cd5d94 Mon Sep 17 00:00:00 2001
From: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>
Date: Tue, 26 Jan 2021 20:32:41 +0530
Subject: watchdog: qcom: Remove incorrect usage of QCOM_WDT_ENABLE_IRQ
From: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>
commit a4f3407c41605d14f09e490045d0609990cd5d94 upstream.
As per register documentation, QCOM_WDT_ENABLE_IRQ which is BIT(1)
of watchdog control register is wakeup interrupt enable bit and
not related to bark interrupt at all, BIT(0) is used for that.
So remove incorrect usage of this bit when supporting bark irq for
pre-timeout notification. Currently with this bit set and bark
interrupt specified, pre-timeout notification and/or watchdog
reset/bite does not occur.
Fixes: 36375491a439 ("watchdog: qcom: support pre-timeout when the bark irq is available")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210126150241.10009-1-saiprakash.ranjan@xxxxxxxxxxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/watchdog/qcom-wdt.c | 13 +------------
1 file changed, 1 insertion(+), 12 deletions(-)
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -22,7 +22,6 @@ enum wdt_reg {
};
#define QCOM_WDT_ENABLE BIT(0)
-#define QCOM_WDT_ENABLE_IRQ BIT(1)
static const u32 reg_offset_data_apcs_tmr[] = {
[WDT_RST] = 0x38,
@@ -58,16 +57,6 @@ struct qcom_wdt *to_qcom_wdt(struct watc
return container_of(wdd, struct qcom_wdt, wdd);
}
-static inline int qcom_get_enable(struct watchdog_device *wdd)
-{
- int enable = QCOM_WDT_ENABLE;
-
- if (wdd->pretimeout)
- enable |= QCOM_WDT_ENABLE_IRQ;
-
- return enable;
-}
-
static irqreturn_t qcom_wdt_isr(int irq, void *arg)
{
struct watchdog_device *wdd = arg;
@@ -86,7 +75,7 @@ static int qcom_wdt_start(struct watchdo
writel(1, wdt_addr(wdt, WDT_RST));
writel(bark * wdt->rate, wdt_addr(wdt, WDT_BARK_TIME));
writel(wdd->timeout * wdt->rate, wdt_addr(wdt, WDT_BITE_TIME));
- writel(qcom_get_enable(wdd), wdt_addr(wdt, WDT_EN));
+ writel(QCOM_WDT_ENABLE, wdt_addr(wdt, WDT_EN));
return 0;
}
Patches currently in stable-queue which might be from saiprakash.ranjan@xxxxxxxxxxxxxx are
queue-5.4/watchdog-qcom-remove-incorrect-usage-of-qcom_wdt_enable_irq.patch
