From 95396d83e96cc1b7887562d07ff0324c11e744db Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 15 Aug 2023 21:01:30 +0200 Subject: [PATCH] ASoC: mediatek: Convert to generic PCM copy ops This patch converts the mediatek BT SCO driver code to use the new unified PCM copy callback. It's a straightforward conversion from *_user() to *_iter() variants. As copy_form/to_iter() updates the internal offset at each read/write, we can drop the cur_*_idx counter in the loop, too. Note that copy_from/to_iter() returns the copied bytes, hence the error condition is adjusted accordingly. Reviewed-by: Mark Brown Link: https://lore.kernel.org/r/20230815190136.8987-20-tiwai@suse.de Signed-off-by: Takashi Iwai --- sound/soc/mediatek/common/mtk-btcvsd.c | 27 ++++++++++----------------- 1 file changed, 10 insertions(+), 17 deletions(-) diff --git a/sound/soc/mediatek/common/mtk-btcvsd.c b/sound/soc/mediatek/common/mtk-btcvsd.c index 1ba0633..c12d170f 100644 --- a/sound/soc/mediatek/common/mtk-btcvsd.c +++ b/sound/soc/mediatek/common/mtk-btcvsd.c @@ -696,11 +696,10 @@ static int wait_for_bt_irq(struct mtk_btcvsd_snd *bt, } static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt, - char __user *buf, + struct iov_iter *buf, size_t count) { ssize_t read_size = 0, read_count = 0, cur_read_idx, cont; - unsigned int cur_buf_ofs = 0; unsigned long avail; unsigned long flags; unsigned int packet_size = bt->rx->packet_size; @@ -743,10 +742,9 @@ static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt, if (read_size > cont) read_size = cont; - if (copy_to_user(buf + cur_buf_ofs, - bt->rx_packet_buf + cur_read_idx, - read_size)) { - dev_warn(bt->dev, "%s(), copy_to_user fail\n", + if (copy_to_iter(bt->rx_packet_buf + cur_read_idx, + read_size, buf) != read_size) { + dev_warn(bt->dev, "%s(), copy_to_iter fail\n", __func__); return -EFAULT; } @@ -756,7 +754,6 @@ static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt, spin_unlock_irqrestore(&bt->rx_lock, flags); read_count += read_size; - cur_buf_ofs += read_size; count -= read_size; } @@ -777,11 +774,10 @@ static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt, } static ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt, - char __user *buf, + struct iov_iter *buf, size_t count) { int written_size = count, avail, cur_write_idx, write_size, cont; - unsigned int cur_buf_ofs = 0; unsigned long flags; unsigned int packet_size = bt->tx->packet_size; @@ -835,11 +831,9 @@ static ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt, if (write_size > cont) write_size = cont; - if (copy_from_user(bt->tx_packet_buf + - cur_write_idx, - buf + cur_buf_ofs, - write_size)) { - dev_warn(bt->dev, "%s(), copy_from_user fail\n", + if (copy_from_iter(bt->tx_packet_buf + cur_write_idx, + write_size, buf) != write_size) { + dev_warn(bt->dev, "%s(), copy_from_iter fail\n", __func__); return -EFAULT; } @@ -847,7 +841,6 @@ static ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt, spin_lock_irqsave(&bt->tx_lock, flags); bt->tx->packet_w += write_size / packet_size; spin_unlock_irqrestore(&bt->tx_lock, flags); - cur_buf_ofs += write_size; count -= write_size; } @@ -1033,7 +1026,7 @@ static snd_pcm_uframes_t mtk_pcm_btcvsd_pointer( static int mtk_pcm_btcvsd_copy(struct snd_soc_component *component, struct snd_pcm_substream *substream, int channel, unsigned long pos, - void __user *buf, unsigned long count) + struct iov_iter *buf, unsigned long count) { struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component); @@ -1274,7 +1267,7 @@ static const struct snd_soc_component_driver mtk_btcvsd_snd_platform = { .prepare = mtk_pcm_btcvsd_prepare, .trigger = mtk_pcm_btcvsd_trigger, .pointer = mtk_pcm_btcvsd_pointer, - .copy_user = mtk_pcm_btcvsd_copy, + .copy = mtk_pcm_btcvsd_copy, }; static int mtk_btcvsd_snd_probe(struct platform_device *pdev) -- 2.7.4