acpi, nfit: fix extended status translations for ACPI DSMs

ACPI DSMs can have an 'extended' status which can be non-zero to convey
additional information about the command. In the xlat_status routine,
where we translate the command statuses, we were returning an error for
a non-zero extended status, even if the primary status indicated success.

Return from each command's 'case' once we have verified both its status
and extend status are good.

Cc: <stable@vger.kernel.org>
Fixes: 11294d63ac91 ("nfit: fail DSMs that return non-zero status by default")
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 71a7d07c28c9..60acbb1d159c 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -113,7 +113,7 @@ static int xlat_status(void *buf, unsigned int cmd, u32 status)
                 flags = ND_ARS_PERSISTENT | ND_ARS_VOLATILE;
                 if ((status >> 16 & flags) == 0)
                         return -ENOTTY;
-                break;
+                return 0;
         case ND_CMD_ARS_START:
                 /* ARS is in progress */
                 if ((status & 0xffff) == NFIT_ARS_START_BUSY)
@@ -122,7 +122,7 @@ static int xlat_status(void *buf, unsigned int cmd, u32 status)
                 /* Command failed */
                 if (status & 0xffff)
                         return -EIO;
-                break;
+                return 0;
         case ND_CMD_ARS_STATUS:
                 ars_status = buf;
                 /* Command failed */
@@ -154,7 +154,7 @@ static int xlat_status(void *buf, unsigned int cmd, u32 status)
                 /* Unknown status */
                 if (status >> 16)
                         return -EIO;
-                break;
+                return 0;
         case ND_CMD_CLEAR_ERROR:
                 clear_err = buf;
                 if (status & 0xffff)
@@ -163,7 +163,7 @@ static int xlat_status(void *buf, unsigned int cmd, u32 status)
                         return -EIO;
                 if (clear_err->length > clear_err->cleared)
                         return clear_err->cleared;
-                break;
+                return 0;
         default:
                 break;
         }