From: Sukwon Ryoo <sw.ryoo@samsung.com>
Date: Fri, 15 Nov 2019 03:53:59 +0000 (+0900)
Subject: [MODAP-55016][COMMON] driver: chub: No new thread when running
X-Git-Url: https://git.stricted.de/?p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git;a=commitdiff_plain;h=816d419d2aea1aa407346793719e4194de79f8aa;hp=1f4f1a3d8ccc19794daeb56e07e07f1b8cb0f328

[MODAP-55016][COMMON] driver: chub: No new thread when running

Change-Id: I69d2ff453d915dc50f8d005c4f52bac86cb05fe7
Signed-off-by: Sukwon Ryoo <sw.ryoo@samsung.com>
---

diff --git a/drivers/staging/nanohub/chub.c b/drivers/staging/nanohub/chub.c
index 39174abb4579..688b69bba153 100644
--- a/drivers/staging/nanohub/chub.c
+++ b/drivers/staging/nanohub/chub.c
@@ -1047,9 +1047,11 @@ int contexthub_poweron(struct contexthub_ipc_info *ipc)
 					atomic_read(&ipc->chub_status), ret, ipc->poweron_lock.flag);
 			}
 		}
-	}
+	} else
+	/* CHUB already went through poweron sequence */
+		return -EINVAL;
 
-	return ret;
+	return 0;
 }
 
 static int contexthub_download_and_check_image(struct contexthub_ipc_info *ipc, enum ipc_region reg)
diff --git a/drivers/staging/nanohub/main.c b/drivers/staging/nanohub/main.c
index 64717c56ab45..4fffce08e6e7 100644
--- a/drivers/staging/nanohub/main.c
+++ b/drivers/staging/nanohub/main.c
@@ -1351,8 +1351,8 @@ static int nanohub_open(struct inode *inode, struct file *file)
 		nonseekable_open(inode, file);
 #ifdef CONFIG_NANOHUB_MAILBOX
 		io = file->private_data;
-		nanohub_reset(io->data);
-		io->data->thread = kthread_run(nanohub_kthread, io->data, "nanohub");
+		if (!nanohub_reset(io->data))
+			io->data->thread = kthread_run(nanohub_kthread, io->data, "nanohub");
 		udelay(30);
 #endif
 		return 0;