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Commit 339ccc36 authored by Cindy H Kao's avatar Cindy H Kao Committed by Inaky Perez-Gonzalez
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wimax/i2400m/sdio: clear the INTR status bit after reading size 



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: default avatarCindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: default avatarInaky Perez-Gonzalez <inaky@linux.intel.com>
parent 2093586d

drivers/net/wimax/i2400m/sdio-rx.c

+5 −1
Original line number Diff line number Diff line
@@ -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);