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can: flexcan: avoid calling usleep_range from interrupt context

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Apparently can_restart() runs from a (timer-) interrupt and can call
flexcan_chip_[en|dis]able(), so avoid using usleep_range()

Signed-off-by: David Jander <david@protonic.nl>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
David Jander 2014-08-27 12:02:16 +02:00 committed by Marc Kleine-Budde
parent 1d7efe9dfa
commit 8badd65e48
1 changed files with 5 additions and 5 deletions
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10
drivers/net/can/flexcan.c
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@ -298,7 +298,7 @@ static int flexcan_chip_enable(struct flexcan_priv *priv)
flexcan_write(reg, &regs->mcr); flexcan_write(reg, &regs->mcr);
while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK)) while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
usleep_range(10, 20); udelay(10);
if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK) if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK)
return -ETIMEDOUT; return -ETIMEDOUT;
@ -317,7 +317,7 @@ static int flexcan_chip_disable(struct flexcan_priv *priv)
flexcan_write(reg, &regs->mcr); flexcan_write(reg, &regs->mcr);
while (timeout-- && !(flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK)) while (timeout-- && !(flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
usleep_range(10, 20); udelay(10);
if (!(flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK)) if (!(flexcan_read(&regs->mcr) & FLEXCAN_MCR_LPM_ACK))
return -ETIMEDOUT; return -ETIMEDOUT;
@ -336,7 +336,7 @@ static int flexcan_chip_freeze(struct flexcan_priv *priv)
flexcan_write(reg, &regs->mcr); flexcan_write(reg, &regs->mcr);
while (timeout-- && !(flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK)) while (timeout-- && !(flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
usleep_range(100, 200); udelay(100);
if (!(flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK)) if (!(flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
return -ETIMEDOUT; return -ETIMEDOUT;
@ -355,7 +355,7 @@ static int flexcan_chip_unfreeze(struct flexcan_priv *priv)
flexcan_write(reg, &regs->mcr); flexcan_write(reg, &regs->mcr);
while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK)) while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK))
usleep_range(10, 20); udelay(10);
if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK) if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_FRZ_ACK)
return -ETIMEDOUT; return -ETIMEDOUT;
@ -370,7 +370,7 @@ static int flexcan_chip_softreset(struct flexcan_priv *priv)
flexcan_write(FLEXCAN_MCR_SOFTRST, &regs->mcr); flexcan_write(FLEXCAN_MCR_SOFTRST, &regs->mcr);
while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_SOFTRST)) while (timeout-- && (flexcan_read(&regs->mcr) & FLEXCAN_MCR_SOFTRST))
usleep_range(10, 20); udelay(10);
if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_SOFTRST) if (flexcan_read(&regs->mcr) & FLEXCAN_MCR_SOFTRST)
return -ETIMEDOUT; return -ETIMEDOUT;