[PATCH] ath10k: fix a NULL vs IS_ERR() check

[Dan Carpenter]

The devm_memremap() function doesn't return NULLs, it returns error
pointers.

Fixes: ba94c753ccb4 ("ath10k: add QMI message handshake for wcn3990 client")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
---
 drivers/net/wireless/ath/ath10k/qmi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/qmi.c 
b/drivers/net/wireless/ath/ath10k/qmi.c
index f0429bee35c2..37b3bd629f48 100644
--- a/drivers/net/wireless/ath/ath10k/qmi.c
+++ b/drivers/net/wireless/ath/ath10k/qmi.c
@@ -931,9 +931,9 @@ static int ath10k_qmi_setup_msa_resources(struct ath10k_qmi 
*qmi, u32 msa_size)
                qmi->msa_mem_size = resource_size(&r);
                qmi->msa_va = devm_memremap(dev, qmi->msa_pa, qmi->msa_mem_size,
                                            MEMREMAP_WT);
-               if (!qmi->msa_va) {
+               if (IS_ERR(qmi->msa_va)) {
                        dev_err(dev, "failed to map memory region: %pa\n", 
&r.start);
-                       return -EBUSY;
+                       return PTR_ERR(qmi->msa_va);
                }
        } else {
                qmi->msa_va = dmam_alloc_coherent(dev, msa_size,
-- 
2.11.0