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authorSebastian Andrzej Siewior <sebastian@breakpoint.cc>2011-10-06 09:55:00 +0200
committerRalf Baechle <ralf@linux-mips.org>2014-01-24 22:39:56 +0100
commitd3864767a85b13e0e0ecc5f4284f65cc26252446 (patch)
tree19090a7d35b94ef612fe085d87567f4005616b25 /arch/mips
parent3c06b12b046e426200d016dbdb1e3e81ffb1c185 (diff)
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mips/ide: flush dcache also if icache does not snoop dcache
If this is not done then the new just read data which remains in dcache will not make it into icache on time. Thus the CPU loads invalid data and executes crap. The result is that the user is not able to execute anything from its IDE based media while reading plain data is still working well. This problem has been reported as Debian #404951 http://bugs.debian.org/404951 http://comments.gmane.org/gmane.linux.ide/45092 Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/2820/
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/include/asm/mach-generic/ide.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/mips/include/asm/mach-generic/ide.h b/arch/mips/include/asm/mach-generic/ide.h
index affa66f..4ae5fbc 100644
--- a/arch/mips/include/asm/mach-generic/ide.h
+++ b/arch/mips/include/asm/mach-generic/ide.h
@@ -23,7 +23,7 @@
static inline void __ide_flush_prologue(void)
{
#ifdef CONFIG_SMP
- if (cpu_has_dc_aliases)
+ if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc)
preempt_disable();
#endif
}
@@ -31,14 +31,14 @@ static inline void __ide_flush_prologue(void)
static inline void __ide_flush_epilogue(void)
{
#ifdef CONFIG_SMP
- if (cpu_has_dc_aliases)
+ if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc)
preempt_enable();
#endif
}
static inline void __ide_flush_dcache_range(unsigned long addr, unsigned long size)
{
- if (cpu_has_dc_aliases) {
+ if (cpu_has_dc_aliases || !cpu_has_ic_fills_f_dc) {
unsigned long end = addr + size;
while (addr < end) {
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