Do not use interruptible waits in an I2C driver; if a process uses signals (eg, Xorg uses SIGALRM and SIGPIPE) then these signals can cause the I2C driver to abort a transaction in progress by another driver, which can cause that driver to fail. I2C drivers are not expected to abort transactions on signals.
Cc: <[email protected]> Signed-off-by: Russell King <[email protected]> Tested-by: Russell King <[email protected]> --- Mark Greer seems to be unreachable now; the address in this driver no longer works, and there is no maintainer entry. This patch has been run on my Cubox (Marvell Dove) for quite a number of months without ill effect. drivers/i2c/busses/i2c-mv64xxx.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index 2e9d567..44d8045 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -252,7 +252,7 @@ mv64xxx_i2c_do_action(struct mv64xxx_i2c_data *drv_data) writel(drv_data->cntl_bits, drv_data->reg_base + MV64XXX_I2C_REG_CONTROL); drv_data->block = 0; - wake_up_interruptible(&drv_data->waitq); + wake_up(&drv_data->waitq); break; case MV64XXX_I2C_ACTION_CONTINUE: @@ -300,7 +300,7 @@ mv64xxx_i2c_do_action(struct mv64xxx_i2c_data *drv_data) writel(drv_data->cntl_bits | MV64XXX_I2C_REG_CONTROL_STOP, drv_data->reg_base + MV64XXX_I2C_REG_CONTROL); drv_data->block = 0; - wake_up_interruptible(&drv_data->waitq); + wake_up(&drv_data->waitq); break; case MV64XXX_I2C_ACTION_INVALID: @@ -315,7 +315,7 @@ mv64xxx_i2c_do_action(struct mv64xxx_i2c_data *drv_data) writel(drv_data->cntl_bits | MV64XXX_I2C_REG_CONTROL_STOP, drv_data->reg_base + MV64XXX_I2C_REG_CONTROL); drv_data->block = 0; - wake_up_interruptible(&drv_data->waitq); + wake_up(&drv_data->waitq); break; } } @@ -381,7 +381,7 @@ mv64xxx_i2c_wait_for_completion(struct mv64xxx_i2c_data *drv_data) unsigned long flags; char abort = 0; - time_left = wait_event_interruptible_timeout(drv_data->waitq, + time_left = wait_event_timeout(drv_data->waitq, !drv_data->block, drv_data->adapter.timeout); spin_lock_irqsave(&drv_data->lock, flags); -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
