Commit 1e93848a authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Ensure set_firmware_width() is called only once 



Call set_firmware_width() only once at runtime.
This prevents that hotplugged CPUs will get stuck in spinlocks later on.

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 7e0b2be9

arch/parisc/kernel/firmware.c

+6 −1
Original line number Diff line number Diff line
@@ -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);