This is a note to let you know that I've just added the patch titled
mfd: altera-sysmgr: Fix a mistake caused by resource_size conversion
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mfd-altera-sysmgr-fix-a-mistake-caused-by-resource_s.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f2eababb31e396fa723e1bf362abe739a496bc5a
Author: Kai Song <songkai01@xxxxxxxxxx>
Date: Wed Oct 6 22:19:26 2021 +0800
mfd: altera-sysmgr: Fix a mistake caused by resource_size conversion
[ Upstream commit fae2570d629cdd72f0611d015fc4ba705ae5422b ]
The resource_size defines that:
res->end - res->start + 1;
The origin original code is:
sysmgr_config.max_register = res->end - res->start - 3;
So, the correct fix is that:
sysmgr_config.max_register = resource_size(res) - 4;
Fixes: d12edf9661a4 ("mfd: altera-sysmgr: Use resource_size function on resource object")
Signed-off-by: Kai Song <songkai01@xxxxxxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211006141926.6120-1-songkai01@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c
index 20cb294c75122..5d3715a28b28e 100644
--- a/drivers/mfd/altera-sysmgr.c
+++ b/drivers/mfd/altera-sysmgr.c
@@ -153,7 +153,7 @@ static int sysmgr_probe(struct platform_device *pdev)
if (!base)
return -ENOMEM;
- sysmgr_config.max_register = resource_size(res) - 3;
+ sysmgr_config.max_register = resource_size(res) - 4;
regmap = devm_regmap_init_mmio(dev, base, &sysmgr_config);
}
