From: Samuel Holland samuel@sholland.org
stable inclusion from stable-v5.10.147 commit 3e0405c69bc9e3717f247c1849a31545098997c1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0W8
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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 Signed-off-by: Jialin Zhang zhangjialin11@huawei.com Reviewed-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/soc/sunxi/sunxi_sram.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c index d4c7bd59429e..5d1305483542 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;