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Commit 90e8f57c authored by Anton Blanchard's avatar Anton Blanchard Committed by Benjamin Herrenschmidt
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powerpc/xics: Reset the CPPR if H_EOI fails 



I have an intermittent kdump fail where the hypervisor fails an H_EOI.
As a result our CPPR is never reset to 0xff and we no longer accept
interrupts.

This patch calls icp_hv_set_cppr to reset the CPPR if H_EOI fails,
fixing the kdump fail.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent a934904d

arch/powerpc/sysdev/xics/icp-hv.c

+7 −6
Original line number Diff line number Diff line
@@ -41,23 +41,24 @@ static inline unsigned int icp_hv_get_xirr(unsigned char cppr) 
	return ret;

}



static inline void icp_hv_set_xirr(unsigned int value)

static inline void icp_hv_set_cppr(u8 value)

{

	long rc = plpar_hcall_norets(H_EOI, value);

	long rc = plpar_hcall_norets(H_CPPR, value);

	if (rc != H_SUCCESS) {

		pr_err("%s: bad return code eoi xirr=0x%x returned %ld\n",

		pr_err("%s: bad return code cppr cppr=0x%x returned %ld\n",

			__func__, value, rc);

		WARN_ON_ONCE(1);

	}

}



static inline void icp_hv_set_cppr(u8 value)

static inline void icp_hv_set_xirr(unsigned int value)

{

	long rc = plpar_hcall_norets(H_CPPR, value);

	long rc = plpar_hcall_norets(H_EOI, value);

	if (rc != H_SUCCESS) {

		pr_err("%s: bad return code cppr cppr=0x%x returned %ld\n",

		pr_err("%s: bad return code eoi xirr=0x%x returned %ld\n",

			__func__, value, rc);

		WARN_ON_ONCE(1);

		icp_hv_set_cppr(value >> 24);

	}

}