On Fri Mar 7 11:24:27 2025 +0100, Arnd Bergmann wrote:
> The errno.h header is not always included indirectly, leading
> to rare randconfig build warnings.
> 
> drivers/media/pci/mgb4/mgb4_regs.c:20:11: error: use of undeclared identifier 
> 'EINVAL'
>    20 |                 return -EINVAL;
> 
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
> Signed-off-by: Hans Verkuil <hverk...@xs4all.nl>

Patch committed.

Thanks,
Hans Verkuil

 drivers/media/pci/mgb4/mgb4_regs.c | 1 +
 1 file changed, 1 insertion(+)

---

diff --git a/drivers/media/pci/mgb4/mgb4_regs.c 
b/drivers/media/pci/mgb4/mgb4_regs.c
index 31befd722d72..b45537dbfafa 100644
--- a/drivers/media/pci/mgb4/mgb4_regs.c
+++ b/drivers/media/pci/mgb4/mgb4_regs.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/ioport.h>
+#include <linux/errno.h>
 #include "mgb4_regs.h"
 
 int mgb4_regs_map(struct resource *res, struct mgb4_regs *regs)

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