remoteproc: qcom: q6v5: Fix NULL vs IS_ERR() bug in q6v5_alloc_memory_region()

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>
Link: https://lore.kernel.org/r/674b32a78563282adeaf3cdf941314a0b8181026.1764427595.git.dan.carpenter@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
index ca748e3bcc7f9fc5cd9e36f6db8a61fd2eacf3b9..d96af0e0f66592835da8a8b544e9d4d77b0a29ce 100644 (file)
--- 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;