linux-kernel - [PATCH 4.19 115/280] nfit/ars: Attempt a short-ARS whenever the ARS state is idle at boot

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Date:   Fri, 22 Mar 2019 12:14:28 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Krzysztof Rusocki <krzysztof.rusocki@...el.com>,
        Toshi Kani <toshi.kani@....com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: [PATCH 4.19 115/280] nfit/ars: Attempt a short-ARS whenever the ARS state is idle at boot

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Williams <dan.j.williams@...el.com>

commit c6c5df293bf1b488cf8459aac658aecfdccb13a9 upstream.

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

Fixes: bc6ba8085842 ("nfit, address-range-scrub: rework and simplify ARS...")
Cc: <stable@...r.kernel.org>
Reported-by: Krzysztof Rusocki <krzysztof.rusocki@...el.com>
Reviewed-by: Toshi Kani <toshi.kani@....com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/acpi/nfit/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2900,6 +2900,7 @@ static int ars_register(struct acpi_nfit
 
 	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 */
@@ -2924,7 +2925,6 @@ static int ars_register(struct acpi_nfit
 		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