Messages in this thread Patch in this message | | | From | Felipe Balbi <> | Subject | [PATCH v2 08/17] i2c: omap: switch over to do {} while loop | Date | Thu, 14 Jun 2012 19:24:18 +0300 |
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this will make sure that we execute at least once. No functional changes otherwise.
Signed-off-by: Felipe Balbi <balbi@ti.com> --- drivers/i2c/busses/i2c-omap.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 94d6c6a..a035d16 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -870,20 +870,29 @@ omap_i2c_isr(int this_irq, void *dev_id) struct omap_i2c_dev *dev = dev_id; u16 bits; u16 stat; - int err, count = 0; + int err = 0, count = 0; if (pm_runtime_suspended(dev->dev)) return IRQ_NONE; - bits = omap_i2c_read_reg(dev, OMAP_I2C_IE_REG); - while ((stat = (omap_i2c_read_reg(dev, OMAP_I2C_STAT_REG))) & bits) { + do { + bits = omap_i2c_read_reg(dev, OMAP_I2C_IE_REG); + stat = omap_i2c_read_reg(dev, OMAP_I2C_STAT_REG); + stat &= bits; + + if (!stat) { + /* my work here is done */ + omap_i2c_complete_cmd(dev, err); + return IRQ_HANDLED; + } + dev_dbg(dev->dev, "IRQ (ISR = 0x%04x)\n", stat); if (count++ == 100) { dev_warn(dev->dev, "Too much work in one IRQ\n"); - break; + omap_i2c_complete_cmd(dev, err); + return IRQ_HANDLED; } - err = 0; complete: /* * Ack the stat in one go, but [R/X]DR and [R/X]RDY should be @@ -987,7 +996,7 @@ complete: dev_err(dev->dev, "Transmit underflow\n"); dev->cmd_err |= OMAP_I2C_STAT_XUDF; } - } + } while (stat); return count ? IRQ_HANDLED : IRQ_NONE; } -- 1.7.10.4
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