Hi Greg,
On Mon, Dec 28, 2020 at 12:00:27PM +0100, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
>
> The patch below does not apply to the 5.4-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@xxxxxxxxxxxxxxx>.
Here is the backport along with 4c3a14fbc05a ("spi: npcm-fiu: simplify the
return expression of npcm_fiu_probe()") which makes backport easier.
--
Regards
Sudip
>From cefb8d3e297579898a170ae99f9bad4c0c5342a4 Mon Sep 17 00:00:00 2001
From: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
Date: Mon, 21 Sep 2020 21:11:06 +0800
Subject: [PATCH 1/2] spi: npcm-fiu: simplify the return expression of
npcm_fiu_probe()
commit 4c3a14fbc05a09fc369fb68a86cdbf6f441a29f2 upstream
Simplify the return expression.
Signed-off-by: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200921131106.93228-1-miaoqinglang@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
---
drivers/spi/spi-npcm-fiu.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/spi/spi-npcm-fiu.c b/drivers/spi/spi-npcm-fiu.c
index 5ed7c9e017fb..561c68329133 100644
--- a/drivers/spi/spi-npcm-fiu.c
+++ b/drivers/spi/spi-npcm-fiu.c
@@ -677,7 +677,6 @@ static int npcm_fiu_probe(struct platform_device *pdev)
struct npcm_fiu_spi *fiu;
void __iomem *regbase;
struct resource *res;
- int ret;
int id;
ctrl = devm_spi_alloc_master(dev, sizeof(*fiu));
@@ -736,11 +735,7 @@ static int npcm_fiu_probe(struct platform_device *pdev)
ctrl->num_chipselect = fiu->info->max_cs;
ctrl->dev.of_node = dev->of_node;
- ret = devm_spi_register_master(dev, ctrl);
- if (ret)
- return ret;
-
- return 0;
+ return devm_spi_register_master(dev, ctrl);
}
static int npcm_fiu_remove(struct platform_device *pdev)
--
2.11.0
>From 02b79219e662710c4ec8fcc4047cd9da8ce3c281 Mon Sep 17 00:00:00 2001
From: Lukas Wunner <lukas@xxxxxxxxx>
Date: Mon, 7 Dec 2020 09:17:16 +0100
Subject: [PATCH 2/2] spi: npcm-fiu: Disable clock in probe error path
commit 234266a5168bbe8220d263e3aa7aa80cf921c483 upstream
If the call to devm_spi_register_master() fails on probe of the NPCM FIU
SPI driver, the clock "fiu->clk" is erroneously not unprepared and
disabled. Fix it.
Fixes: ace55c411b11 ("spi: npcm-fiu: add NPCM FIU controller driver")
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.4+
Cc: Tomer Maimon <tmaimon77@xxxxxxxxx>
Link: https://lore.kernel.org/r/9ae62f4e1cfe542bec57ac2743e6fca9f9548f55.1607286887.git.lukas@xxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
---
drivers/spi/spi-npcm-fiu.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-npcm-fiu.c b/drivers/spi/spi-npcm-fiu.c
index 561c68329133..1e770d673905 100644
--- a/drivers/spi/spi-npcm-fiu.c
+++ b/drivers/spi/spi-npcm-fiu.c
@@ -677,7 +677,7 @@ static int npcm_fiu_probe(struct platform_device *pdev)
struct npcm_fiu_spi *fiu;
void __iomem *regbase;
struct resource *res;
- int id;
+ int id, ret;
ctrl = devm_spi_alloc_master(dev, sizeof(*fiu));
if (!ctrl)
@@ -735,7 +735,11 @@ static int npcm_fiu_probe(struct platform_device *pdev)
ctrl->num_chipselect = fiu->info->max_cs;
ctrl->dev.of_node = dev->of_node;
- return devm_spi_register_master(dev, ctrl);
+ ret = devm_spi_register_master(dev, ctrl);
+ if (ret)
+ clk_disable_unprepare(fiu->clk);
+
+ return ret;
}
static int npcm_fiu_remove(struct platform_device *pdev)
--
2.11.0
