mmc: dw_mmc-pltfm: fix the potential NULL pointer dereference

platform_get_resource can be returned the NULL pointer.
Then regs->start should be referred to NULL Pointer.
devm_ioremap_resource() checks whether res is NULL or not.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/inotail.c b/inotail.c
index e0ed410..3a4bc1a 100644
--- a/inotail.c
+++ b/inotail.c
@@ -222,7 +222,7 @@ static ssize_t tail_pipe(struct file_struct *f)
 
 	/* We will just tail everything here */
 	while ((rc = read(f->fd, buf, BUFFER_SIZE)) > 0) {
-		if (write(STDOUT_FILENO, buf, (size_t) rc) < 0) {
+		if (write(STDOUT_FILENO, buf, (size_t) rc) <= 0) {
 			/* e.g. when writing to a pipe which gets closed */
 			fprintf(stderr, "Error: Could not write to stdout (%s)\n", strerror(errno));
 			return -1;