linux-kernel - [PATCH v2 1/6] nfit/ars: Attempt a short-ARS whenever the ARS state is idle at boot

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Message-ID: <155025983247.1043225.5927153534700111609.stgit@dwillia2-desk3.amr.corp.intel.com>
Date:   Fri, 15 Feb 2019 11:43:52 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     linux-nvdimm@...ts.01.org
Cc:     Krzysztof Rusocki <krzysztof.rusocki@...el.com>,
        vishal.l.verma@...el.com, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/6] nfit/ars: Attempt a short-ARS whenever the ARS state
 is idle at boot

If query-ARS reports that ARS has stopped and requires continuation
attempt to retrieve short-ARS results before continuing the long
operation.

Reported-by: Krzysztof Rusocki <krzysztof.rusocki@...el.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
 drivers/acpi/nfit/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index e18ade5d74e9..3d681a92ff7f 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -3012,6 +3012,7 @@ static int ars_register(struct acpi_nfit_desc *acpi_desc,
 
 	switch (acpi_nfit_query_poison(acpi_desc)) {
 	case 0:
+	case -ENOSPC:
 	case -EAGAIN:
 		rc = ars_start(acpi_desc, nfit_spa, ARS_REQ_SHORT);
 		/* shouldn't happen, try again later */
@@ -3036,7 +3037,6 @@ static int ars_register(struct acpi_nfit_desc *acpi_desc,
 		break;
 	case -EBUSY:
 	case -ENOMEM:
-	case -ENOSPC:
 		/*
 		 * BIOS was using ARS, wait for it to complete (or
 		 * resources to become available) and then perform our