From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Fixes these sparse warnings.
drivers/media/pci/ttpci/budget-core.c:250:17: warning: context imbalance in 'ttpci_budget_debiread' - different lock contexts for basic block
drivers/media/pci/ttpci/budget-core.c:289:17: warning: context imbalance in 'ttpci_budget_debiwrite' - different lock contexts for basic block
To be honest, the new code does look better than the old.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/pci/ttpci/budget-core.c | 89 +++++++++++++++++++----------------
1 file changed, 49 insertions(+), 40 deletions(-)
diff --git a/drivers/media/pci/ttpci/budget-core.c b/drivers/media/pci/ttpci/budget-core.c
index 37d02fe..23e0549 100644
--- a/drivers/media/pci/ttpci/budget-core.c
+++ b/drivers/media/pci/ttpci/budget-core.c
@@ -231,63 +231,59 @@ static void vpeirq(unsigned long data)
}
-int ttpci_budget_debiread(struct budget *budget, u32 config, int addr, int count,
- int uselocks, int nobusyloop)
+static int ttpci_budget_debiread_nolock(struct budget *budget, u32 config,
+ int addr, int count, int nobusyloop)
{
struct saa7146_dev *saa = budget->dev;
- int result = 0;
- unsigned long flags = 0;
-
- if (count > 4 || count <= 0)
- return 0;
-
- if (uselocks)
- spin_lock_irqsave(&budget->debilock, flags);
+ int result;
- if ((result = saa7146_wait_for_debi_done(saa, nobusyloop)) < 0) {
- if (uselocks)
- spin_unlock_irqrestore(&budget->debilock, flags);
+ result = saa7146_wait_for_debi_done(saa, nobusyloop);
+ if (result < 0)
return result;
- }
saa7146_write(saa, DEBI_COMMAND, (count << 17) | 0x10000 | (addr & 0xffff));
saa7146_write(saa, DEBI_CONFIG, config);
saa7146_write(saa, DEBI_PAGE, 0);
saa7146_write(saa, MC2, (2 << 16) | 2);
- if ((result = saa7146_wait_for_debi_done(saa, nobusyloop)) < 0) {
- if (uselocks)
- spin_unlock_irqrestore(&budget->debilock, flags);
+ result = saa7146_wait_for_debi_done(saa, nobusyloop);
+ if (result < 0)
return result;
- }
result = saa7146_read(saa, DEBI_AD);
result &= (0xffffffffUL >> ((4 - count) * 8));
-
- if (uselocks)
- spin_unlock_irqrestore(&budget->debilock, flags);
-
return result;
}
-int ttpci_budget_debiwrite(struct budget *budget, u32 config, int addr,
- int count, u32 value, int uselocks, int nobusyloop)
+int ttpci_budget_debiread(struct budget *budget, u32 config, int addr, int count,
+ int uselocks, int nobusyloop)
{
- struct saa7146_dev *saa = budget->dev;
- unsigned long flags = 0;
- int result;
-
if (count > 4 || count <= 0)
return 0;
- if (uselocks)
- spin_lock_irqsave(&budget->debilock, flags);
+ if (uselocks) {
+ unsigned long flags;
+ int result;
- if ((result = saa7146_wait_for_debi_done(saa, nobusyloop)) < 0) {
- if (uselocks)
- spin_unlock_irqrestore(&budget->debilock, flags);
+ spin_lock_irqsave(&budget->debilock, flags);
+ result = ttpci_budget_debiread_nolock(budget, config, addr,
+ count, nobusyloop);
+ spin_unlock_irqrestore(&budget->debilock, flags);
return result;
}
+ return ttpci_budget_debiread_nolock(budget, config, addr,
+ count, nobusyloop);
+}
+
+static int ttpci_budget_debiwrite_nolock(struct budget *budget, u32 config,
+ int addr, int count, u32 value, int nobusyloop)
+{
+ struct saa7146_dev *saa = budget->dev;
+ int result;
+
+ result = saa7146_wait_for_debi_done(saa, nobusyloop);
+ if (result < 0)
+ return result;
saa7146_write(saa, DEBI_COMMAND, (count << 17) | 0x00000 | (addr & 0xffff));
saa7146_write(saa, DEBI_CONFIG, config);
@@ -295,15 +291,28 @@ int ttpci_budget_debiwrite(struct budget *budget, u32 config, int addr,
saa7146_write(saa, DEBI_AD, value);
saa7146_write(saa, MC2, (2 << 16) | 2);
- if ((result = saa7146_wait_for_debi_done(saa, nobusyloop)) < 0) {
- if (uselocks)
- spin_unlock_irqrestore(&budget->debilock, flags);
- return result;
- }
+ result = saa7146_wait_for_debi_done(saa, nobusyloop);
+ return result < 0 ? result : 0;
+}
- if (uselocks)
+int ttpci_budget_debiwrite(struct budget *budget, u32 config, int addr,
+ int count, u32 value, int uselocks, int nobusyloop)
+{
+ if (count > 4 || count <= 0)
+ return 0;
+
+ if (uselocks) {
+ unsigned long flags;
+ int result;
+
+ spin_lock_irqsave(&budget->debilock, flags);
+ result = ttpci_budget_debiwrite_nolock(budget, config, addr,
+ count, value, nobusyloop);
spin_unlock_irqrestore(&budget->debilock, flags);
- return 0;
+ return result;
+ }
+ return ttpci_budget_debiwrite_nolock(budget, config, addr,
+ count, value, nobusyloop);
}
--
2.1.3
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