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usb: dwc3: omap: remove unnecessary lock

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the lock was only taken inside the hardirq
handler, which runs with IRQs disabled. There's
no chance of any race condition happening, even
on SMP machines. It's safe to remove that
spinlock.

Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2013-12-07 11:54:19 -06:00
parent 9ba96ae507
commit c6d7641470
1 changed files with 0 additions and 10 deletions
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10
drivers/usb/dwc3/dwc3-omap.c
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@ -20,7 +20,6 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/platform_data/dwc3-omap.h>
#include <linux/pm_runtime.h>
@ -120,9 +119,6 @@
#define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID (1 << 1)
struct dwc3_omap {
/* device lock */
spinlock_t lock;
struct device *dev;
int irq;
@ -280,8 +276,6 @@ static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
struct dwc3_omap *omap = _omap;
u32 reg;
spin_lock(&omap->lock);
reg = dwc3_omap_read_irqmisc_status(omap);
if (reg & USBOTGSS_IRQMISC_DMADISABLECLR) {
@ -322,8 +316,6 @@ static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
dwc3_omap_write_irq0_status(omap, reg);
spin_unlock(&omap->lock);
return IRQ_HANDLED;
}
@ -449,8 +441,6 @@ static int dwc3_omap_probe(struct platform_device *pdev)
}
}
spin_lock_init(&omap->lock);
omap->dev = dev;
omap->irq = irq;
omap->base = base;