Make sure, that set_firmware_width() is only called once at
runtime. This prevents that if secondary CPUs are started later
get stuck in spinlocks.
Signed-off-by: Helge Deller <deller@xxxxxx>
---
arch/parisc/kernel/firmware.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 3370e347dde3..c6b11bdb8602 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -83,7 +83,7 @@ extern unsigned long pdc_result2[NUM_PDC_RESULT];
/* Firmware needs to be initially set to narrow to determine the
* actual firmware width. */
-int parisc_narrow_firmware __ro_after_init = 1;
+int parisc_narrow_firmware __ro_after_init = 2;
#endif
/* On most currently-supported platforms, IODC I/O calls are 32-bit calls
@@ -174,6 +174,11 @@ void set_firmware_width_unlocked(void)
void set_firmware_width(void)
{
unsigned long flags;
+
+ /* already initialized? */
+ if (parisc_narrow_firmware != 2)
+ return;
+
spin_lock_irqsave(&pdc_lock, flags);
set_firmware_width_unlocked();
spin_unlock_irqrestore(&pdc_lock, flags);
--
2.35.1
