From: Nishanth Menon <nm@xxxxxx>
Silent failure makes debug hard. So, provide rate limited error
messages in functional and oft-used code to prevent spam
when something goes wrong..
Signed-off-by: Nishanth Menon <nm@xxxxxx>
---
arch/arm/mach-omap2/powerdomain.c | 72 +++++++++++++++++++++++++++++-------
1 files changed, 58 insertions(+), 14 deletions(-)
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index 06a566b..691247e 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -19,6 +19,7 @@
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/string.h>
+#include <linux/ratelimit.h>
#include <trace/events/power.h>
#include "cm2xxx_3xxx.h"
@@ -146,8 +147,12 @@ static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
int prev, next, state, trace_state;
- if (pwrdm == NULL)
+ if (pwrdm == NULL) {
+ WARN_ONCE(1, "null pwrdm\n");
+ pr_err_ratelimited("%s: powerdomain: null pwrdm param\n",
+ __func__);
return -EINVAL;
+ }
state = pwrdm_read_fpwrst(pwrdm);
@@ -174,6 +179,8 @@ static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
}
break;
default:
+ pr_err_ratelimited("%s: powerdomain %s: bad flag %d\n",
+ __func__, pwrdm->name, flag);
return -EINVAL;
}
@@ -690,7 +697,8 @@ int pwrdm_set_next_fpwrst(struct powerdomain *pwrdm,
unsigned long flags;
if (!pwrdm || IS_ERR(pwrdm)) {
- pr_debug("%s: invalid params: pwrdm=%p\n", __func__, pwrdm);
+ pr_err_ratelimited("%s: invalid params: pwrdm=%p\n",
+ __func__, pwrdm);
return -EINVAL;
}
@@ -775,8 +783,11 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
if (!pwrdm)
return -EINVAL;
- if (!(pwrdm->pwrsts & (1 << pwrst)))
+ if (!(pwrdm->pwrsts & (1 << pwrst))) {
+ pr_err_ratelimited("%s: powerdomain %s: bad pwrst %d\n",
+ __func__, pwrdm->name, pwrst);
return -EINVAL;
+ }
pr_debug("powerdomain: setting next powerstate for %s to %0x\n",
pwrdm->name, pwrst);
@@ -924,8 +935,11 @@ int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
if (!pwrdm)
return -EINVAL;
- if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst)))
+ if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst))) {
+ pr_err_ratelimited("%s: powerdomain %s: bad pwrst %d\n",
+ __func__, pwrdm->name, pwrst);
return -EINVAL;
+ }
pr_debug("powerdomain: setting next logic powerstate for %s to %0x\n",
pwrdm->name, pwrst);
@@ -958,11 +972,17 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
if (!pwrdm)
return -EINVAL;
- if (pwrdm->banks < (bank + 1))
+ if (pwrdm->banks < (bank + 1)) {
+ pr_err_ratelimited("%s: powerdomain %s: bad bank %d\n",
+ __func__, pwrdm->name, bank);
return -EEXIST;
+ }
- if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst)))
+ if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst))) {
+ pr_err_ratelimited("%s: powerdomain %s: bank %d bad pwrst %d\n",
+ __func__, pwrdm->name, bank, pwrst);
return -EINVAL;
+ }
pr_debug("powerdomain: setting next memory powerstate for domain %s "
"bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst);
@@ -996,11 +1016,17 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
if (!pwrdm)
return -EINVAL;
- if (pwrdm->banks < (bank + 1))
+ if (pwrdm->banks < (bank + 1)) {
+ pr_err_ratelimited("%s: powerdomain %s: bad bank %d\n",
+ __func__, pwrdm->name, bank);
return -EEXIST;
+ }
- if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst)))
+ if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst))) {
+ pr_err_ratelimited("%s: powerdomain %s: bank %d bad pwrst %d\n",
+ __func__, pwrdm->name, bank, pwrst);
return -EINVAL;
+ }
pr_debug("powerdomain: setting next memory powerstate for domain %s "
"bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst);
@@ -1092,8 +1118,11 @@ int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
if (!pwrdm)
return ret;
- if (pwrdm->banks < (bank + 1))
+ if (pwrdm->banks < (bank + 1)) {
+ pr_err_ratelimited("%s: powerdomain %s: bad bank %d\n",
+ __func__, pwrdm->name, bank);
return ret;
+ }
if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
bank = 1;
@@ -1122,8 +1151,11 @@ int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
if (!pwrdm)
return ret;
- if (pwrdm->banks < (bank + 1))
+ if (pwrdm->banks < (bank + 1)) {
+ pr_err_ratelimited("%s: powerdomain %s: bad bank %d\n",
+ __func__, pwrdm->name, bank);
return ret;
+ }
if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
bank = 1;
@@ -1151,8 +1183,11 @@ int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
if (!pwrdm)
return ret;
- if (pwrdm->banks < (bank + 1))
+ if (pwrdm->banks < (bank + 1)) {
+ pr_err_ratelimited("%s: powerdomain %s: bad bank %d\n",
+ __func__, pwrdm->name, bank);
return ret;
+ }
if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst)
ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank);
@@ -1208,8 +1243,11 @@ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
if (!pwrdm)
return ret;
- if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
+ if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) {
+ pr_err_ratelimited("%s: powerdomain %s: no HDSAR in flag %d\n",
+ __func__, pwrdm->name, pwrdm->flags);
return ret;
+ }
pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n",
pwrdm->name);
@@ -1238,8 +1276,11 @@ int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
if (!pwrdm)
return ret;
- if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
+ if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR)) {
+ pr_err_ratelimited("%s: powerdomain %s: no HDSAR in flag %d\n",
+ __func__, pwrdm->name, pwrdm->flags);
return ret;
+ }
pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n",
pwrdm->name);
@@ -1279,8 +1320,11 @@ int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
if (!pwrdm)
return -EINVAL;
- if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE))
+ if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE)) {
+ pr_err_ratelimited("%s: powerdomain %s:no lowpwrch in flag%d\n",
+ __func__, pwrdm->name, pwrdm->flags);
return -EINVAL;
+ }
pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n",
pwrdm->name);
--
1.7.7.6
--
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