From: Brandon Maier <brandon.maier@collins.com>
Date: Wed, 2 Nov 2022 22:47:56 +0000 (-0500)
Subject: misc-utils: flashcp: verify data in --partition
X-Git-Tag: v2.1.6~15
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=7b5557499a5f2ef612a54014c4f4e8d368d35bd6;p=mtd-utils.git

misc-utils: flashcp: verify data in --partition

The --partition mode is not verifying that data is being written
successfully.

Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
---

diff --git a/misc-utils/flashcp.c b/misc-utils/flashcp.c
index 1dc0877..f4acba5 100644
--- a/misc-utils/flashcp.c
+++ b/misc-utils/flashcp.c
@@ -464,6 +464,15 @@ DIFF_BLOCKS:
 			/* write to device */
 			safe_lseek(dev_fd, current_dev_block, SEEK_SET, device);
 			safe_write(dev_fd,src,i,written,(unsigned long long)filestat.st_size,device);
+
+			/* read from device */
+			safe_lseek(dev_fd, current_dev_block, SEEK_SET, device);
+			safe_read (dev_fd,device,dest,i);
+
+			/* compare buffers for write success */
+			if (memcmp (src,dest,i))
+				log_failure("File does not seem to match flash data. First mismatch at 0x%.8zx-0x%.8zx\n",
+						written,written + i);
 		}
 
 		erase.start += i;