[PATCH v2] fpga: bridge: incorrect set to clear freeze_illegal_request register

[tze . yee . ng]

From: Tanmay Kathpalia <tanmay.kathpalia@xxxxxxxxxx>

A Partial Region Controller can be connected to one or more
Freeze Bridge. Each Freeze Bridge has an illegal_request
bit represented in the freeze_illegal_request register.
Thus, instead of just set to clear the illegal_request bit
for first Freeze Bridge, we need to ensure the set to clear
action is applied to which ever Freeze Bridge that has
occurrence of illegal request.

Fixes: ca24a648f535 ("fpga: add altera freeze bridge support")
Cc: stable@xxxxxxxxxxxxxxx # v4.10+

Signed-off-by: Tanmay Kathpalia <tanmay.kathpalia@xxxxxxxxxx>
Signed-off-by: Tze Yee Ng <tze.yee.ng@xxxxxxxxxx>
---
Taking over this patch from Tanmay.

Changes in v2:
- Add "Cc: stable@xxxxxxxxxxxxxxx # v4.10+" into the signoff area so the
  stable-kernel rule is satisfied (reported by kernel test robot).
- Remove Chiau Ee's signoff as he is no longer working on this patch.

Link v1: 
https://lore.kernel.org/all/20250311151601.12264-1-tanmay.kathpalia@xxxxxxxxxx/
---
 drivers/fpga/altera-freeze-bridge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/fpga/altera-freeze-bridge.c b/drivers/fpga/altera-freeze-bridge.c
index c24c976117c8..2591dcc53d83 100644
--- a/drivers/fpga/altera-freeze-bridge.c
+++ b/drivers/fpga/altera-freeze-bridge.c
@@ -51,7 +51,7 @@ static int altera_freeze_br_req_ack(struct altera_freeze_br_data *priv,
 		if (illegal) {
 			dev_err(dev, "illegal request detected 0x%x", illegal);
 
-			writel(1, csr_illegal_req_addr);
+			writel(illegal, csr_illegal_req_addr);
 
 			illegal = readl(csr_illegal_req_addr);
 			if (illegal)
-- 
2.43.7