[PATCH] mailbox: zynqmp: Fix off by 1 errors

[Andrew Goodbody]

Use resource_size to correctly calculate the size to pass to
devm_ioremap and avoid the off by 1 errors previously present.

This issue was found by Smatch.

Signed-off-by: Andrew Goodbody <andrew.goodbody at linaro.org>
---
 drivers/mailbox/zynqmp-ipi.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/mailbox/zynqmp-ipi.c b/drivers/mailbox/zynqmp-ipi.c
index 851aa737c03..f62277385fb 100644
--- a/drivers/mailbox/zynqmp-ipi.c
+++ b/drivers/mailbox/zynqmp-ipi.c
@@ -188,7 +188,7 @@ static int zynqmp_ipi_dest_probe(struct udevice *dev)
 		return -EINVAL;
 	};
 	zynqmp->local_req_regs = devm_ioremap(dev, res.start,
-					      (res.start - res.end));
+					      resource_size(&res));
 	if (!zynqmp->local_req_regs)
 		return -EINVAL;
 
@@ -197,7 +197,7 @@ static int zynqmp_ipi_dest_probe(struct udevice *dev)
 		return -EINVAL;
 	};
 	zynqmp->local_res_regs = devm_ioremap(dev, res.start,
-					      (res.start - res.end));
+					      resource_size(&res));
 	if (!zynqmp->local_res_regs)
 		return -EINVAL;
 
@@ -206,7 +206,7 @@ static int zynqmp_ipi_dest_probe(struct udevice *dev)
 		return -EINVAL;
 	};
 	zynqmp->remote_req_regs = devm_ioremap(dev, res.start,
-					       (res.start - res.end));
+					       resource_size(&res));
 	if (!zynqmp->remote_req_regs)
 		return -EINVAL;
 
@@ -215,7 +215,7 @@ static int zynqmp_ipi_dest_probe(struct udevice *dev)
 		return -EINVAL;
 	};
 	zynqmp->remote_res_regs = devm_ioremap(dev, res.start,
-					       (res.start - res.end));
+					       resource_size(&res));
 	if (!zynqmp->remote_res_regs)
 		return -EINVAL;
 

---
base-commit: 4c3b5fcd810081bd7f3c51859fe1b5f0c159803c
change-id: 20250728-zynqmp-ipi-0b1791238085

Best regards,
-- 
Andrew Goodbody <andrew.goodbody at linaro.org>