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Commit 44fcbe83 authored by Raghavendra Rao Ananta's avatar Raghavendra Rao Ananta
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hvc_dcc: Disable preemption when cheking for smp_processor_id 



smp_processor_id() complains if called from a preemptible
context. Hence, disable the preemption just before calling
this and enable it back later.

Change-Id: I6721796d11186eb15021b37d5ea8250afa0edda0
Signed-off-by: default avatarRaghavendra Rao Ananta <rananta@codeaurora.org>
parent 1462003e

drivers/tty/hvc/hvc_dcc.c

+7 −1
Original line number Diff line number Diff line
@@ -72,12 +72,18 @@ static bool hvc_dcc_check(void) 


	static bool dcc_core0_available;



	preempt_disable();



	/*

	 * If we're not on core 0, but we previously confirmed that DCC is

	 * active, then just return true.

	 */

	if (smp_processor_id() && dcc_core0_available)

	if (smp_processor_id() && dcc_core0_available) {

		preempt_enable();

		return true;

	}



	preempt_enable();



	/* Write a test character to check if it is handled */

	__dcc_putchar('\n');