The devm_ioremap_resource_wc() function never returns NULL, it returns
error pointers.  Update the checking to match.

Fixes: c70b9d5fdcd7 ("remoteproc: qcom: Use of_reserved_mem_region_* functions for "memory-region"")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
---
 drivers/remoteproc/qcom_q6v5_wcss.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index ca748e3bcc7f..d96af0e0f665 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -887,9 +887,9 @@ static int q6v5_alloc_memory_region(struct q6v5_wcss *wcss)
 	wcss->mem_reloc = res.start;
 	wcss->mem_size = resource_size(&res);
 	wcss->mem_region = devm_ioremap_resource_wc(dev, &res);
-	if (!wcss->mem_region) {
+	if (IS_ERR(wcss->mem_region)) {
 		dev_err(dev, "unable to map memory region: %pR\n", &res);
-		return -EBUSY;
+		return PTR_ERR(wcss->mem_region);
 	}
 
 	return 0;
-- 
2.51.0