soc: sunxi: sram: Actually claim SRAM regions

[ Upstream commit b6b6282a3207abf62f4731b8de6217019b84164e ]

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: 21d4f23cd41f ("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 1b0d50f3634935cbfe50dcf7b11ba484f4bfcd50..55f2d4dd42e8fc5d4da6037f875f5f0480ffdbc1 100644 (file)
--- 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;