9os

commit b25ce9afc440777a92a36fb4e47817b37c49f859
parent acce5499735e62c93f8383df281037b16f76b753
Author: Roberto Vargas <roberto.vargas@arm.com>
Date:   Tue,  5 Mar 2019 12:32:06 +0000

[dev] Fix blobread()

It was passing not initialized values to buf2chan().

Change-Id: Iee785cf7765b63abc607ac03e059f8ca1d3bc740

Diffstat:
M
drivers/devblob.c
 | 
4
+++-

1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/devblob.c b/drivers/devblob.c
@@ -53,14 +53,16 @@ blobstatus(Chan *c, void *buf, int n)
 static int
 blobread(Chan *c, void *buf, int n)
 {
+	Qid qid = c->qid & ~CHDIR;
 	Dirtab *dp;
 
-	switch (c->qid & ~CHDIR) {
+	switch (qid) {
 	case Qblobfs:
 		return dirread(c, buf, n, blobfstab, nblobs+1, devgen);
 	case Qctl:
 		return blobstatus(c, buf, n);
 	default:
+		dp = &blobfstab[qid - 1];
 		return buf2chan(c, buf, dp->data, n, dp->length);
 	}
 }