提交 ae6b95d4 编写于 作者: A Alexey Dobriyan 提交者: Linus Torvalds

[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: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 91e4ee38
......@@ -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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