mmc: meson-gx: remove useless lock

[ Upstream commit 83076d2268c72d123f3d1eaf186a9f56ec1b943a ]

The spinlock is only used within the irq handler so it does not
seem very useful.

Signed-off-by: Jerome Brunet <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
Stable-dep-of: 3c40eb814532 ("mmc: meson-gx: remove redundant mmc_request_done() call from irq context")
Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Harshit Mogalapalli <[email protected]>

drivers/mmc/host/meson-gx-mmc.c

@@ -26,7 +26,6 @@
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/ioport.h>
-#include <linux/spinlock.h>
 #include <linux/dma-mapping.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
@@ -136,7 +135,6 @@ struct meson_host {
 	struct	mmc_host	*mmc;
 	struct	mmc_command	*cmd;
 
-	spinlock_t lock;
 	void __iomem *regs;
 	struct clk *core_clk;
 	struct clk *mmc_clk;
@@ -1016,8 +1014,6 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 	if (WARN_ON(!host) || WARN_ON(!host->cmd))
 		return IRQ_NONE;
 
-	spin_lock(&host->lock);
-
 	cmd = host->cmd;
 	data = cmd->data;
 	cmd->error = 0;
@@ -1067,7 +1063,6 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 	if (ret == IRQ_HANDLED)
 		meson_mmc_request_done(host->mmc, cmd->mrq);
 
-	spin_unlock(&host->lock);
 	return ret;
 }
 
@@ -1220,8 +1215,6 @@ static int meson_mmc_probe(struct platform_device *pdev)
 	host->dev = &pdev->dev;
 	dev_set_drvdata(&pdev->dev, host);
 
-	spin_lock_init(&host->lock);
-
 	/* Get regulators and the supported OCR mask */
 	host->vqmmc_enabled = false;
 	ret = mmc_regulator_get_supply(mmc);