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Subject[patch V2 17/36] net: sunbmac: Replace in_interrupt() usage
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

bigmac_init_rings() has an argument signaling if it is called from the
interrupt handler. This is used to decide between GFP_KERNEL and GFP_ATOMIC
for memory allocations.

But it also checks in_interrupt() to handle invocations which come from the
timer callback bigmac_timer() via bigmac_hw_init(), which is invoked with
'in_irq = 0'. While the timer callback is clearly not in hard interrupt
context it is still not sleepable context.

Rename the argument to `non_blocking' and set it to true if invoked from
the timer callback or the interrupt handler which allows to remove the
in_interrupt() check and makes the code consistent.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>


---
drivers/net/ethernet/sun/sunbmac.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

--- a/drivers/net/ethernet/sun/sunbmac.c
+++ b/drivers/net/ethernet/sun/sunbmac.c
@@ -209,13 +209,13 @@ static void bigmac_clean_rings(struct bi
}
}

-static void bigmac_init_rings(struct bigmac *bp, int from_irq)
+static void bigmac_init_rings(struct bigmac *bp, bool non_blocking)
{
struct bmac_init_block *bb = bp->bmac_block;
int i;
gfp_t gfp_flags = GFP_KERNEL;

- if (from_irq || in_interrupt())
+ if (non_blocking)
gfp_flags = GFP_ATOMIC;

bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
@@ -489,7 +489,7 @@ static void bigmac_tcvr_init(struct bigm
}
}

-static int bigmac_init_hw(struct bigmac *, int);
+static int bigmac_init_hw(struct bigmac *, bool);

static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
{
@@ -549,7 +549,7 @@ static void bigmac_timer(struct timer_li
if (ret == -1) {
printk(KERN_ERR "%s: Link down, cable problem?\n",
bp->dev->name);
- ret = bigmac_init_hw(bp, 0);
+ ret = bigmac_init_hw(bp, true);
if (ret) {
printk(KERN_ERR "%s: Error, cannot re-init the "
"BigMAC.\n", bp->dev->name);
@@ -617,7 +617,7 @@ static void bigmac_begin_auto_negotiatio
add_timer(&bp->bigmac_timer);
}

-static int bigmac_init_hw(struct bigmac *bp, int from_irq)
+static int bigmac_init_hw(struct bigmac *bp, bool non_blocking)
{
void __iomem *gregs = bp->gregs;
void __iomem *cregs = bp->creg;
@@ -635,7 +635,7 @@ static int bigmac_init_hw(struct bigmac
qec_init(bp);

/* Alloc and reset the tx/rx descriptor chains. */
- bigmac_init_rings(bp, from_irq);
+ bigmac_init_rings(bp, non_blocking);

/* Initialize the PHY. */
bigmac_tcvr_init(bp);
@@ -749,7 +749,7 @@ static void bigmac_is_medium_rare(struct
}

printk(" RESET\n");
- bigmac_init_hw(bp, 1);
+ bigmac_init_hw(bp, true);
}

/* BigMAC transmit complete service routines. */
@@ -921,7 +921,7 @@ static int bigmac_open(struct net_device
return ret;
}
timer_setup(&bp->bigmac_timer, bigmac_timer, 0);
- ret = bigmac_init_hw(bp, 0);
+ ret = bigmac_init_hw(bp, false);
if (ret)
free_irq(dev->irq, bp);
return ret;
@@ -945,7 +945,7 @@ static void bigmac_tx_timeout(struct net
{
struct bigmac *bp = netdev_priv(dev);

- bigmac_init_hw(bp, 0);
+ bigmac_init_hw(bp, true);
netif_wake_queue(dev);
}


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