firmware: stratix10-svc: Fix an NULL vs IS_ERR() bug in probe

commit dd218433f2b635d97e8fda3eed047151fd528ce4 upstream.

The devm_memremap() function returns error pointers.
It never returns NULL. Fix the check.

Fixes: 7ca5ce896524 ("firmware: add Intel Stratix10 service layer driver")
Cc: stable@vger.kernel.org
Signed-off-by: Wang Ming <machel@vivo.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20230727193750.983795-1-dinguyen@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 2d674126160fe3c12873c47d9d886d4abcc0c3a2..cab11af28c231ef646cc82c7378e08fba28e36ab 100644 (file)
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -756,7 +756,7 @@ svc_create_memory_pool(struct platform_device *pdev,
        paddr = begin;
        size = end - begin;
        va = devm_memremap(dev, paddr, size, MEMREMAP_WC);
-       if (!va) {
+       if (IS_ERR(va)) {
                dev_err(dev, "fail to remap shared memory\n");
                return ERR_PTR(-EINVAL);
        }