[PATCH 5.0 029/238] nfit/ars: Attempt a short-ARS whenever the ARS state is idle at boot

From: Greg Kroah-Hartman
Date: Fri Mar 22 2019 - 08:35:20 EST

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


From: Dan Williams <dan.j.williams@xxxxxxxxx>

commit c6c5df293bf1b488cf8459aac658aecfdccb13a9 upstream.

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

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

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
@@ -3021,6 +3021,7 @@ 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 */
@@ -3045,7 +3046,6 @@ static int ars_register(struct acpi_nfit
case -EBUSY:
case -ENOMEM:
- case -ENOSPC:
* BIOS was using ARS, wait for it to complete (or
* resources to become available) and then perform our