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Message-ID: <20080812161745.GB32164@oksana.dev.rtsoft.ru>
Date: Tue, 12 Aug 2008 20:17:45 +0400
From: Anton Vorontsov <avorontsov@...mvista.com>
To: Alessandro Zummo <a.zummo@...ertech.it>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org,
linuxppc-dev@...abs.org
Subject: [PATCH 2/2] rtc: bunch of drivers: fix 'no irq' case handing
This patch fixes bunch of irq checking misuses. Most drivers were
getting irq via platform_get_irq(), which returns -ENXIO or r->start.
Platforms may specify r->start = 0 to emphasize 'no irq' case, and
drivers should handle this correctly.
rtc-cmos.c is special. It is using PNP and platform bindings.
Hopefully nobody is using PNP IRQ 0 for RTC. So the changes should
be safe.
Also, rtc-sh.c was using platform_get_irq, and stored a result into
an unsigned type, then was checking for < 0. This is fixed now.
Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>
---
Unlike the first patch, this one is untested. Please review carefully.
drivers/rtc/rtc-at32ap700x.c | 2 +-
drivers/rtc/rtc-cmos.c | 4 ++--
drivers/rtc/rtc-ds1511.c | 18 +++++++++---------
drivers/rtc/rtc-ds1553.c | 14 +++++++-------
drivers/rtc/rtc-m48t59.c | 2 +-
drivers/rtc/rtc-sh.c | 10 ++++++----
drivers/rtc/rtc-stk17ta8.c | 14 +++++++-------
drivers/rtc/rtc-vr41xx.c | 4 ++--
8 files changed, 35 insertions(+), 33 deletions(-)
diff --git a/drivers/rtc/rtc-at32ap700x.c b/drivers/rtc/rtc-at32ap700x.c
index 90b9a65..e327f6f 100644
--- a/drivers/rtc/rtc-at32ap700x.c
+++ b/drivers/rtc/rtc-at32ap700x.c
@@ -222,7 +222,7 @@ static int __init at32_rtc_probe(struct platform_device *pdev)
}
irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
+ if (irq <= 0) {
dev_dbg(&pdev->dev, "could not get irq\n");
ret = -ENXIO;
goto out;
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 6ea349a..2dea444 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -57,8 +57,8 @@ struct cmos_rtc {
u8 century;
};
-/* both platform and pnp busses use negative numbers for invalid irqs */
-#define is_valid_irq(n) ((n) >= 0)
+/* both platform and pnp busses use positive numbers for valid irqs */
+#define is_valid_irq(n) ((n) > 0)
static const char driver_name[] = "rtc_cmos";
diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index 0f0d27d..434b045 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -326,9 +326,9 @@ ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0) {
+ if (pdata->irq <= 0)
return -EINVAL;
- }
+
pdata->alrm_mday = alrm->time.tm_mday;
pdata->alrm_hour = alrm->time.tm_hour;
pdata->alrm_min = alrm->time.tm_min;
@@ -346,9 +346,9 @@ ds1511_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0) {
+ if (pdata->irq <= 0)
return -EINVAL;
- }
+
alrm->time.tm_mday = pdata->alrm_mday < 0 ? 0 : pdata->alrm_mday;
alrm->time.tm_hour = pdata->alrm_hour < 0 ? 0 : pdata->alrm_hour;
alrm->time.tm_min = pdata->alrm_min < 0 ? 0 : pdata->alrm_min;
@@ -385,7 +385,7 @@ ds1511_rtc_release(struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
pdata->irqen = 0;
ds1511_rtc_update_alarm(pdata);
}
@@ -397,7 +397,7 @@ ds1511_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0) {
+ if (pdata->irq <= 0) {
return -ENOIOCTLCMD; /* fall back into rtc-dev's emulation */
}
switch (cmd) {
@@ -559,7 +559,7 @@ ds1511_rtc_probe(struct platform_device *pdev)
* if the platform has an interrupt in mind for this device,
* then by all means, set it
*/
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
rtc_read(RTC_CMD1);
if (request_irq(pdata->irq, ds1511_interrupt,
IRQF_DISABLED | IRQF_SHARED, pdev->name, pdev) < 0) {
@@ -586,7 +586,7 @@ ds1511_rtc_probe(struct platform_device *pdev)
if (pdata->rtc) {
rtc_device_unregister(pdata->rtc);
}
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
free_irq(pdata->irq, pdev);
}
if (ds1511_base) {
@@ -609,7 +609,7 @@ ds1511_rtc_remove(struct platform_device *pdev)
sysfs_remove_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr);
rtc_device_unregister(pdata->rtc);
pdata->rtc = NULL;
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
/*
* disable the alarm interrupt
*/
diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c
index a19f114..426048f 100644
--- a/drivers/rtc/rtc-ds1553.c
+++ b/drivers/rtc/rtc-ds1553.c
@@ -162,7 +162,7 @@ static int ds1553_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -EINVAL;
pdata->alrm_mday = alrm->time.tm_mday;
pdata->alrm_hour = alrm->time.tm_hour;
@@ -179,7 +179,7 @@ static int ds1553_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -EINVAL;
alrm->time.tm_mday = pdata->alrm_mday < 0 ? 0 : pdata->alrm_mday;
alrm->time.tm_hour = pdata->alrm_hour < 0 ? 0 : pdata->alrm_hour;
@@ -212,7 +212,7 @@ static void ds1553_rtc_release(struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
pdata->irqen = 0;
ds1553_rtc_update_alarm(pdata);
}
@@ -224,7 +224,7 @@ static int ds1553_rtc_ioctl(struct device *dev, unsigned int cmd,
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -ENOIOCTLCMD; /* fall back into rtc-dev's emulation */
switch (cmd) {
case RTC_AIE_OFF:
@@ -339,7 +339,7 @@ static int __devinit ds1553_rtc_probe(struct platform_device *pdev)
if (readb(ioaddr + RTC_FLAGS) & RTC_FLAGS_BLF)
dev_warn(&pdev->dev, "voltage-low detected.\n");
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
writeb(0, ioaddr + RTC_INTERRUPTS);
if (request_irq(pdata->irq, ds1553_rtc_interrupt,
IRQF_DISABLED | IRQF_SHARED,
@@ -365,7 +365,7 @@ static int __devinit ds1553_rtc_probe(struct platform_device *pdev)
out:
if (pdata->rtc)
rtc_device_unregister(pdata->rtc);
- if (pdata->irq >= 0)
+ if (pdata->irq > 0)
free_irq(pdata->irq, pdev);
if (ioaddr)
iounmap(ioaddr);
@@ -381,7 +381,7 @@ static int __devexit ds1553_rtc_remove(struct platform_device *pdev)
sysfs_remove_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr);
rtc_device_unregister(pdata->rtc);
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
writeb(0, pdata->ioaddr + RTC_INTERRUPTS);
free_irq(pdata->irq, pdev);
}
diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index 013e6c1..827a60b 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -412,7 +412,7 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
* the mode without IRQ.
*/
m48t59->irq = platform_get_irq(pdev, 0);
- if (m48t59->irq < 0)
+ if (m48t59->irq <= 0)
m48t59->irq = NO_IRQ;
if (m48t59->irq != NO_IRQ) {
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index 1f88e9e..2ac40cf 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -89,7 +89,9 @@ struct sh_rtc {
void __iomem *regbase;
unsigned long regsize;
struct resource *res;
- unsigned int alarm_irq, periodic_irq, carry_irq;
+ int alarm_irq;
+ int periodic_irq;
+ int carry_irq;
struct rtc_device *rtc_dev;
spinlock_t lock;
unsigned long capabilities; /* See asm-sh/rtc.h for cap bits */
@@ -585,19 +587,19 @@ static int __devinit sh_rtc_probe(struct platform_device *pdev)
/* get periodic/carry/alarm irqs */
rtc->periodic_irq = platform_get_irq(pdev, 0);
- if (unlikely(rtc->periodic_irq < 0)) {
+ if (unlikely(rtc->periodic_irq <= 0)) {
dev_err(&pdev->dev, "No IRQ for period\n");
goto err_badres;
}
rtc->carry_irq = platform_get_irq(pdev, 1);
- if (unlikely(rtc->carry_irq < 0)) {
+ if (unlikely(rtc->carry_irq <= 0)) {
dev_err(&pdev->dev, "No IRQ for carry\n");
goto err_badres;
}
rtc->alarm_irq = platform_get_irq(pdev, 2);
- if (unlikely(rtc->alarm_irq < 0)) {
+ if (unlikely(rtc->alarm_irq <= 0)) {
dev_err(&pdev->dev, "No IRQ for alarm\n");
goto err_badres;
}
diff --git a/drivers/rtc/rtc-stk17ta8.c b/drivers/rtc/rtc-stk17ta8.c
index 31d3c8c..ad1ae47 100644
--- a/drivers/rtc/rtc-stk17ta8.c
+++ b/drivers/rtc/rtc-stk17ta8.c
@@ -170,7 +170,7 @@ static int stk17ta8_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -EINVAL;
pdata->alrm_mday = alrm->time.tm_mday;
pdata->alrm_hour = alrm->time.tm_hour;
@@ -187,7 +187,7 @@ static int stk17ta8_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -EINVAL;
alrm->time.tm_mday = pdata->alrm_mday < 0 ? 0 : pdata->alrm_mday;
alrm->time.tm_hour = pdata->alrm_hour < 0 ? 0 : pdata->alrm_hour;
@@ -220,7 +220,7 @@ static void stk17ta8_rtc_release(struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
pdata->irqen = 0;
stk17ta8_rtc_update_alarm(pdata);
}
@@ -232,7 +232,7 @@ static int stk17ta8_rtc_ioctl(struct device *dev, unsigned int cmd,
struct platform_device *pdev = to_platform_device(dev);
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- if (pdata->irq < 0)
+ if (pdata->irq <= 0)
return -ENOIOCTLCMD; /* fall back into rtc-dev's emulation */
switch (cmd) {
case RTC_AIE_OFF:
@@ -342,7 +342,7 @@ static int __init stk17ta8_rtc_probe(struct platform_device *pdev)
if (readb(ioaddr + RTC_FLAGS) & RTC_FLAGS_PF)
dev_warn(&pdev->dev, "voltage-low detected.\n");
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
writeb(0, ioaddr + RTC_INTERRUPTS);
if (request_irq(pdata->irq, stk17ta8_rtc_interrupt,
IRQF_DISABLED | IRQF_SHARED,
@@ -368,7 +368,7 @@ static int __init stk17ta8_rtc_probe(struct platform_device *pdev)
out:
if (pdata->rtc)
rtc_device_unregister(pdata->rtc);
- if (pdata->irq >= 0)
+ if (pdata->irq > 0)
free_irq(pdata->irq, pdev);
if (ioaddr)
iounmap(ioaddr);
@@ -384,7 +384,7 @@ static int __devexit stk17ta8_rtc_remove(struct platform_device *pdev)
sysfs_remove_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr);
rtc_device_unregister(pdata->rtc);
- if (pdata->irq >= 0) {
+ if (pdata->irq > 0) {
writeb(0, pdata->ioaddr + RTC_INTERRUPTS);
free_irq(pdata->irq, pdev);
}
diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index 884b635..e441c9e 100644
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -360,7 +360,7 @@ static int __devinit rtc_probe(struct platform_device *pdev)
spin_unlock_irq(&rtc_lock);
aie_irq = platform_get_irq(pdev, 0);
- if (aie_irq < 0 || aie_irq >= NR_IRQS) {
+ if (aie_irq <= 0 || aie_irq >= NR_IRQS) {
retval = -EBUSY;
goto err_device_unregister;
}
@@ -371,7 +371,7 @@ static int __devinit rtc_probe(struct platform_device *pdev)
goto err_device_unregister;
pie_irq = platform_get_irq(pdev, 1);
- if (pie_irq < 0 || pie_irq >= NR_IRQS)
+ if (pie_irq <= 0 || pie_irq >= NR_IRQS)
goto err_free_irq;
retval = request_irq(pie_irq, rtclong1_interrupt, IRQF_DISABLED,
--
1.5.6.3
--
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