Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ae6b95d4d86565a4f267359852f7fbe000b6e0e7
Commit: ae6b95d4d86565a4f267359852f7fbe000b6e0e7
Parent: 91e4ee381d23ef67196a03924485aeceb32d6753
Author: Alexey Dobriyan <[EMAIL PROTECTED]>
AuthorDate: Tue Feb 20 13:57:57 2007 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Feb 20 17:10:14 2007 -0800
[PATCH] mwave: interesting flags savings
Flags from spin_lock_irqsave() are saved into global variable and restored
from it. My gut feeling this is very racy.
Signed-off-by: Alexey Dobriyan <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/char/mwave/3780i.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/char/mwave/3780i.c b/drivers/char/mwave/3780i.c
index 4e4865e..492dbfb 100644
--- a/drivers/char/mwave/3780i.c
+++ b/drivers/char/mwave/3780i.c
@@ -63,8 +63,6 @@
#include "3780i.h"
static DEFINE_SPINLOCK(dsp_lock);
-static unsigned long flags;
-
static void PaceMsaAccess(unsigned short usDspBaseIO)
{
@@ -76,6 +74,7 @@ static void PaceMsaAccess(unsigned short usDspBaseIO)
unsigned short dsp3780I_ReadMsaCfg(unsigned short usDspBaseIO,
unsigned long ulMsaAddr)
{
+ unsigned long flags;
unsigned short val;
PRINTK_3(TRACE_3780I,
@@ -96,6 +95,7 @@ unsigned short dsp3780I_ReadMsaCfg(unsigned short usDspBaseIO,
void dsp3780I_WriteMsaCfg(unsigned short usDspBaseIO,
unsigned long ulMsaAddr, unsigned short usValue)
{
+ unsigned long flags;
PRINTK_4(TRACE_3780I,
"3780i::dsp3780i_WriteMsaCfg entry usDspBaseIO %x ulMsaAddr %lx
usValue %x\n",
@@ -175,6 +175,7 @@ int dsp3780I_EnableDSP(DSP_3780I_CONFIG_SETTINGS *
pSettings,
unsigned short *pIrqMap,
unsigned short *pDmaMap)
{
+ unsigned long flags;
unsigned short usDspBaseIO = pSettings->usDspBaseIO;
int i;
DSP_UART_CFG_1 rUartCfg1;
@@ -354,6 +355,7 @@ int dsp3780I_EnableDSP(DSP_3780I_CONFIG_SETTINGS *
pSettings,
int dsp3780I_DisableDSP(DSP_3780I_CONFIG_SETTINGS * pSettings)
{
+ unsigned long flags;
unsigned short usDspBaseIO = pSettings->usDspBaseIO;
DSP_ISA_SLAVE_CONTROL rSlaveControl;
@@ -383,6 +385,7 @@ int dsp3780I_DisableDSP(DSP_3780I_CONFIG_SETTINGS *
pSettings)
int dsp3780I_Reset(DSP_3780I_CONFIG_SETTINGS * pSettings)
{
+ unsigned long flags;
unsigned short usDspBaseIO = pSettings->usDspBaseIO;
DSP_BOOT_DOMAIN rBootDomain;
DSP_HBRIDGE_CONTROL rHBridgeControl;
@@ -427,6 +430,7 @@ int dsp3780I_Reset(DSP_3780I_CONFIG_SETTINGS * pSettings)
int dsp3780I_Run(DSP_3780I_CONFIG_SETTINGS * pSettings)
{
+ unsigned long flags;
unsigned short usDspBaseIO = pSettings->usDspBaseIO;
DSP_BOOT_DOMAIN rBootDomain;
DSP_HBRIDGE_CONTROL rHBridgeControl;
@@ -473,6 +477,7 @@ int dsp3780I_Run(DSP_3780I_CONFIG_SETTINGS * pSettings)
int dsp3780I_ReadDStore(unsigned short usDspBaseIO, void __user *pvBuffer,
unsigned uCount, unsigned long ulDSPAddr)
{
+ unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
unsigned short val;
@@ -514,6 +519,7 @@ int dsp3780I_ReadAndClearDStore(unsigned short usDspBaseIO,
void __user *pvBuffer, unsigned uCount,
unsigned long ulDSPAddr)
{
+ unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
unsigned short val;
@@ -555,6 +561,7 @@ int dsp3780I_ReadAndClearDStore(unsigned short usDspBaseIO,
int dsp3780I_WriteDStore(unsigned short usDspBaseIO, void __user *pvBuffer,
unsigned uCount, unsigned long ulDSPAddr)
{
+ unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
@@ -596,6 +603,7 @@ int dsp3780I_WriteDStore(unsigned short usDspBaseIO, void
__user *pvBuffer,
int dsp3780I_ReadIStore(unsigned short usDspBaseIO, void __user *pvBuffer,
unsigned uCount, unsigned long ulDSPAddr)
{
+ unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
PRINTK_5(TRACE_3780I,
@@ -643,6 +651,7 @@ int dsp3780I_ReadIStore(unsigned short usDspBaseIO, void
__user *pvBuffer,
int dsp3780I_WriteIStore(unsigned short usDspBaseIO, void __user *pvBuffer,
unsigned uCount, unsigned long ulDSPAddr)
{
+ unsigned long flags;
unsigned short __user *pusBuffer = pvBuffer;
PRINTK_5(TRACE_3780I,
@@ -691,6 +700,7 @@ int dsp3780I_WriteIStore(unsigned short usDspBaseIO, void
__user *pvBuffer,
int dsp3780I_GetIPCSource(unsigned short usDspBaseIO,
unsigned short *pusIPCSource)
{
+ unsigned long flags;
DSP_HBRIDGE_CONTROL rHBridgeControl;
unsigned short temp;
-
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