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wimax/i2400m/sdio: clear the INTR status bit after reading size

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In order to avoid issues during high-load traffic, the interrupt
status register has to be cleared ONLY after the RX size is read.

Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
This commit is contained in:
Cindy H Kao 2009-08-10 18:36:15 -07:00 committed by Inaky Perez-Gonzalez
parent 2093586de2
commit 339ccc362c
1 changed files with 5 additions and 1 deletions
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6
drivers/net/wimax/i2400m/sdio-rx.c
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@ -138,6 +138,11 @@ void i2400ms_rx(struct i2400ms *i2400ms)
ret = rx_size;
goto error_get_size;
}
/*
* Hardware quirk: make sure to clear the INTR status register
* AFTER getting the data transfer size.
*/
sdio_writeb(func, 1, I2400MS_INTR_CLEAR_ADDR, &ret);
ret = -ENOMEM;
skb = alloc_skb(rx_size, GFP_ATOMIC);
@ -209,7 +214,6 @@ void i2400ms_irq(struct sdio_func *func)
dev_err(dev, "RX: BUG? got IRQ but no interrupt ready?\n");
goto error_no_irq;
}
sdio_writeb(func, 1, I2400MS_INTR_CLEAR_ADDR, &ret);
i2400ms_rx(i2400ms);
error_no_irq:
d_fnend(6, dev, "(i2400ms %p) = void\n", i2400ms);