From ae6b95d4d86565a4f267359852f7fbe000b6e0e7 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Tue, 20 Feb 2007 13:57:57 -0800 Subject: [PATCH] [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/mwave/3780i.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/char/mwave/3780i.c b/drivers/char/mwave/3780i.c index 4e4865e90e50..492dbfb2efd6 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; -- GitLab