linux-kernel - [PATCH 4.19 116/280] nfit/ars: Attempt short-ARS even in the no_init

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Date:   Fri, 22 Mar 2019 12:14:29 +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, Erwin Tsaur <erwin.tsaur@...cle.com>,
        Toshi Kani <toshi.kani@....com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: [PATCH 4.19 116/280] nfit/ars: Attempt short-ARS even in the no_init_ars case

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

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

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

commit fa3ed4d981b1fc19acdd07fcb152a4bd3706892b upstream.

The no_init_ars option is meant to prevent long-ARS, but short-ARS
should be allowed to grab any immediate results.

Fixes: bc6ba8085842 ("nfit, address-range-scrub: rework and simplify ARS...")
Cc: <stable@...r.kernel.org>
Reported-by: Erwin Tsaur <erwin.tsaur@...cle.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 |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2892,11 +2892,12 @@ static int ars_register(struct acpi_nfit
 {
 	int rc;
 
-	if (no_init_ars || test_bit(ARS_FAILED, &nfit_spa->ars_state))
+	if (test_bit(ARS_FAILED, &nfit_spa->ars_state))
 		return acpi_nfit_register_region(acpi_desc, nfit_spa);
 
 	set_bit(ARS_REQ_SHORT, &nfit_spa->ars_state);
-	set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
+	if (!no_init_ars)
+		set_bit(ARS_REQ_LONG, &nfit_spa->ars_state);
 
 	switch (acpi_nfit_query_poison(acpi_desc)) {
 	case 0: