linux-kernel - [PATCH 1/2] media: s5p-mfc: check for firmware allocation before requesting firmware

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Date:   Fri,  6 Oct 2017 15:30:07 -0600
From:   Shuah Khan <shuahkh@....samsung.com>
To:     kyungmin.park@...sung.com, kamil@...as.org, jtp.park@...sung.com,
        a.hajda@...sung.com, mchehab@...nel.org
Cc:     Shuah Khan <shuahkh@....samsung.com>,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] media: s5p-mfc: check for firmware allocation before requesting firmware

Check if firmware is allocated before requesting firmware instead of
requesting firmware only to release it if firmware is not allocated.

Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
 drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c b/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
index 69ef9c2..f064a0d1 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
@@ -55,6 +55,11 @@ int s5p_mfc_load_firmware(struct s5p_mfc_dev *dev)
 	 * into kernel. */
 	mfc_debug_enter();
 
+	if (!dev->fw_buf.virt) {
+		mfc_err("MFC firmware is not allocated\n");
+		return -EINVAL;
+	}
+
 	for (i = MFC_FW_MAX_VERSIONS - 1; i >= 0; i--) {
 		if (!dev->variant->fw_name[i])
 			continue;
@@ -75,11 +80,6 @@ int s5p_mfc_load_firmware(struct s5p_mfc_dev *dev)
 		release_firmware(fw_blob);
 		return -ENOMEM;
 	}
-	if (!dev->fw_buf.virt) {
-		mfc_err("MFC firmware is not allocated\n");
-		release_firmware(fw_blob);
-		return -EINVAL;
-	}
 	memcpy(dev->fw_buf.virt, fw_blob->data, fw_blob->size);
 	wmb();
 	release_firmware(fw_blob);
-- 
2.7.4