linux-kernel - [PATCH char-misc-next 2/4] misc: mic: return error properly

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Date:	Mon, 23 Nov 2015 17:24:30 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Sudeep Dutt <sudeep.dutt@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH char-misc-next 2/4] misc: mic: return error properly

If request_firmware() succeeds then rc becomes 0. After that if the test
for strcmp() fails then we were jumping to label done: and returning rc.
But rc being 0 we returned success whereas we have failed here and we
were supposed to return an error.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---

I am not sure if this was intentional. Another case might be that if the
string bootmode is "flash" then mic_x100_load_command_line() was
intentionally skipped and success was returned.

 drivers/misc/mic/host/mic_x100.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mic/host/mic_x100.c b/drivers/misc/mic/host/mic_x100.c
index cd5208d..317e25f 100644
--- a/drivers/misc/mic/host/mic_x100.c
+++ b/drivers/misc/mic/host/mic_x100.c
@@ -468,8 +468,13 @@ mic_x100_load_firmware(struct mic_device *mdev, const char *buf)
 	}
 	memcpy_toio(mdev->aper.va + mdev->bootaddr, fw->data, fw->size);
 	mdev->ops->write_spad(mdev, MIC_X100_FW_SIZE, fw->size);
-	if (!strcmp(mdev->cosm_dev->bootmode, "flash"))
+	if (!strcmp(mdev->cosm_dev->bootmode, "flash")) {
+		rc = -EINVAL;
+		dev_err(&mdev->pdev->dev, "%s %d rc %d\n",
+			__func__, __LINE__, rc);
+		release_firmware(fw);
 		goto done;
+	}
 	/* load command line */
 	rc = mic_x100_load_command_line(mdev, fw);
 	if (rc) {
-- 
1.9.1

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