diff options
| author | Bing Zhao <bzhao@marvell.com> | 2014-03-28 08:30:42 +0400 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-03-28 11:09:30 +0400 |
| commit | 8af4840a36f3d8210604ecfd5b1ce9b39745e7ba (patch) | |
| tree | 5307f7fa10919c3783db940be8be62ba22a39d86 /drivers/bluetooth/btmrvl_sdio.c | |
| parent | 8002d77ca9edbf81b81ab5154d75f7cce3d0511e (diff) | |
| download | linux-8af4840a36f3d8210604ecfd5b1ce9b39745e7ba.tar.xz | |
Bluetooth: btmrvl: separate write-to-clear function from interrupt handler
This patch improves readability and makes future changes easier.
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth/btmrvl_sdio.c')
| -rw-r--r-- | drivers/bluetooth/btmrvl_sdio.c | 53 |
1 files changed, 32 insertions, 21 deletions
diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c index 1b52c9f5230d..7883793717fd 100644 --- a/drivers/bluetooth/btmrvl_sdio.c +++ b/drivers/bluetooth/btmrvl_sdio.c @@ -667,6 +667,36 @@ static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv) return 0; } +static int btmrvl_sdio_write_to_clear(struct btmrvl_sdio_card *card, u8 *ireg) +{ + int ret; + + *ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret); + if (ret) { + BT_ERR("sdio_readb: read int status failed: %d", ret); + return ret; + } + + if (*ireg) { + /* + * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS + * Clear the interrupt status register and re-enable the + * interrupt. + */ + BT_DBG("int_status = 0x%x", *ireg); + + sdio_writeb(card->func, ~(*ireg) & (DN_LD_HOST_INT_STATUS | + UP_LD_HOST_INT_STATUS), + card->reg->host_intstatus, &ret); + if (ret) { + BT_ERR("sdio_writeb: clear int status failed: %d", ret); + return ret; + } + } + + return 0; +} + static void btmrvl_sdio_interrupt(struct sdio_func *func) { struct btmrvl_private *priv; @@ -684,28 +714,9 @@ static void btmrvl_sdio_interrupt(struct sdio_func *func) priv = card->priv; - ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret); - if (ret) { - BT_ERR("sdio_readb: read int status register failed"); + ret = btmrvl_sdio_write_to_clear(card, &ireg); + if (ret) return; - } - - if (ireg != 0) { - /* - * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS - * Clear the interrupt status register and re-enable the - * interrupt. - */ - BT_DBG("ireg = 0x%x", ireg); - - sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS | - UP_LD_HOST_INT_STATUS), - card->reg->host_intstatus, &ret); - if (ret) { - BT_ERR("sdio_writeb: clear int status register failed"); - return; - } - } spin_lock_irqsave(&priv->driver_lock, flags); sdio_ireg |= ireg; |