From: Samuel Holland <samuel@sholland.org>
Date: Mon, 15 Aug 2022 04:12:40 +0000 (-0500)
Subject: soc: sunxi: sram: Actually claim SRAM regions
X-Git-Tag: v5.15.73~67
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8b07378ebe43a001d928d6704d0e49215ba81a95;p=platform%2Fkernel%2Flinux-rpi.git

soc: sunxi: sram: Actually claim SRAM regions

[ Upstream commit fd362baad2e659ef0fb5652f023a606b248f1781 ]

sunxi_sram_claim() checks the sram_desc->claimed flag before updating
the register, with the intent that only one device can claim a region.
However, this was ineffective because the flag was never set.

Fixes: 4af34b572a85 ("drivers: soc: sunxi: Introduce SoC driver to map SRAMs")
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220815041248.53268-4-samuel@sholland.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c
index 42833e3..20b5d38 100644
--- a/drivers/soc/sunxi/sunxi_sram.c
+++ b/drivers/soc/sunxi/sunxi_sram.c
@@ -254,6 +254,7 @@ int sunxi_sram_claim(struct device *dev)
 	writel(val | ((device << sram_data->offset) & mask),
 	       base + sram_data->reg);
 
+	sram_desc->claimed = true;
 	spin_unlock(&sram_lock);
 
 	return 0;