[PATCH] misc: rtsx: check the value returned from a function for errors before being used

[Yang Li]

Add missing return value check in pm_runtime_get disabling the
sensor. The issue is reported by coverity with the following error:

Medium:Unchecked return value(CHECKED_RETURN)
CWE252: Value returned from a function is not checked for errors before
being used.
Calling "pm_runtime_get" without checking return value.

Reported-by: Abaci Robot <ab...@linux.alibaba.com>
Signed-off-by: Yang Li <yang....@linux.alibaba.com>
---
 drivers/misc/cardreader/rtsx_pcr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/cardreader/rtsx_pcr.c 
b/drivers/misc/cardreader/rtsx_pcr.c
index 2733111..2cc37fd 100644
--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -142,13 +142,16 @@ static void rtsx_pm_full_on(struct rtsx_pcr *pcr)
 
 void rtsx_pci_start_run(struct rtsx_pcr *pcr)
 {
+       int status;
        /* If pci device removed, don't queue idle work any more */
        if (pcr->remove_pci)
                return;
 
        if (pcr->rtd3_en)
                if (pcr->is_runtime_suspended) {
-                       pm_runtime_get(&(pcr->pci->dev));
+                       status = pm_runtime_get(&(pcr->pci->dev));
+                       if (status < 0 && status != -EINPROGRESS)
+                               pm_runtime_put_noidle(&(pcr->pci->dev));
                        pcr->is_runtime_suspended = false;
                }
 
-- 
1.8.3.1