[PATCH v3 2/7] firmware: coreboot: Unmap ioregion on failure

[Stephen Boyd]

Both callers of coreboot_table_init() ioremap the pointer that comes in
but they don't unmap the memory on failure. Both of them also fail probe
immediately with the return value of coreboot_table_init(), leaking a
mapping when it fails. Plug the leak so the mapping isn't left unused.

Cc: Wei-Ning Huang <wnhuang@xxxxxxxxxxxx>
Cc: Julius Werner <jwerner@xxxxxxxxxxxx>
Cc: Brian Norris <briannorris@xxxxxxxxxxxx>
Cc: Samuel Holland <samuel@xxxxxxxxxxxx>
Fixes: 570d30c2823f ("firmware: coreboot: Expose the coreboot table as a bus")
Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
---
 drivers/firmware/google/coreboot_table.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/firmware/google/coreboot_table.c b/drivers/firmware/google/coreboot_table.c
index 19db5709ae28..0d3e140444ae 100644
--- a/drivers/firmware/google/coreboot_table.c
+++ b/drivers/firmware/google/coreboot_table.c
@@ -138,6 +138,9 @@ int coreboot_table_init(struct device *dev, void __iomem *ptr)
 		ptr_entry += entry.size;
 	}
 
+	if (ret)
+		iounmap(ptr);
+
 	return ret;
 }
 EXPORT_SYMBOL(coreboot_table_init);
-- 
Sent by a computer through tubes