gpu: host1x: fix uninitialized variable use

The error handling for platform_get_irq() failing no longer works after
a recent change, clang now points this out with a warning:

  drivers/gpu/host1x/dev.c:520:6: error: variable 'syncpt_irq' is uninitialized when used here [-Werror,-Wuninitialized]
          if (syncpt_irq < 0)
              ^~~~~~~~~~

Fix this by removing the variable and checking the correct error status.

Fixes: 625d4ffb438c ("gpu: host1x: Rewrite syncpoint interrupt handling")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index 4872d18..aae2efe 100644 (file)
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -487,7 +487,6 @@ static int host1x_get_resets(struct host1x *host)
 static int host1x_probe(struct platform_device *pdev)
 {
        struct host1x *host;
-       int syncpt_irq;
        int err;
 
        host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
@@ -517,8 +516,8 @@ static int host1x_probe(struct platform_device *pdev)
        }
 
        host->syncpt_irq = platform_get_irq(pdev, 0);
-       if (syncpt_irq < 0)
-               return syncpt_irq;
+       if (host->syncpt_irq < 0)
+               return host->syncpt_irq;
 
        mutex_init(&host->devices_lock);
        INIT_LIST_HEAD(&host->devices);