static void end_swap_bio_write(struct bio *bio, int err)
{
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
struct page *page = bio->bi_io_vec[0].bv_page;
static unsigned long swap_error_rs_time;
if (!uptodate) {
SetPageError(page);
/*
* We failed to write the page out to swap-space.
* Re-dirty the page in order to avoid it being reclaimed.
* Also print a dire warning that things will go BAD (tm)
* very quickly.
*
* Also clear PG_reclaim to avoid rotate_reclaimable_page()
*/
set_page_dirty(page);
if (printk_timed_ratelimit(&swap_error_rs_time,
SWAP_ERROR_LOG_RATE_MS))
printk(KERN_ALERT "Write-error on swap-device (%u:%u:%Lu)\n",
imajor(bio->bi_bdev->bd_inode),
iminor(bio->bi_bdev->bd_inode),
(unsigned long long)bio->bi_sector);
ClearPageReclaim(page);
}
end_page_writeback(page);
bio_put(bio);
}
static ssize_t
ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
int unaligned_aio = 0;
int ret;
trace_ext4_file_write(iocb->ki_filp->f_path.dentry, iocb->ki_left);
/*
* If we have encountered a bitmap-format file, the size limit
* is smaller than s_maxbytes, which is for extent-mapped files.
*/
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
size_t length = iov_length(iov, nr_segs);
if ((pos > sbi->s_bitmap_maxbytes ||
(pos == sbi->s_bitmap_maxbytes && length > 0)))
return -EFBIG;
if (pos + length > sbi->s_bitmap_maxbytes) {
nr_segs = iov_shorten((struct iovec *)iov, nr_segs,
sbi->s_bitmap_maxbytes - pos);
}
} else if (unlikely((iocb->ki_filp->f_flags & O_DIRECT) &&
!is_sync_kiocb(iocb))) {
unaligned_aio = ext4_unaligned_aio(inode, iov, nr_segs, pos);
}
/* Unaligned direct AIO must be serialized; see comment above */
if (unaligned_aio) {
static unsigned long unaligned_warn_time;
/* Warn about this once per day */
if (printk_timed_ratelimit(&unaligned_warn_time, 60*60*24*HZ))
ext4_msg(inode->i_sb, KERN_WARNING,
"Unaligned AIO/DIO on inode %ld by %s; "
"performance will be poor.",
inode->i_ino, current->comm);
mutex_lock(ext4_aio_mutex(inode));
ext4_aiodio_wait(inode);
}
ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
if (unaligned_aio)
mutex_unlock(ext4_aio_mutex(inode));
trace_file_write_done(iocb->ki_filp);
return ret;
}
static ssize_t
ext4_file_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
int unaligned_aio = 0;
int ret;
trace_ext4_file_write(iocb->ki_filp->f_path.dentry, iocb->ki_left);
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
size_t length = iov_length(iov, nr_segs);
if ((pos > sbi->s_bitmap_maxbytes ||
(pos == sbi->s_bitmap_maxbytes && length > 0)))
return -EFBIG;
if (pos + length > sbi->s_bitmap_maxbytes) {
nr_segs = iov_shorten((struct iovec *)iov, nr_segs,
sbi->s_bitmap_maxbytes - pos);
}
} else if (unlikely((iocb->ki_filp->f_flags & O_DIRECT) &&
!is_sync_kiocb(iocb))) {
unaligned_aio = ext4_unaligned_aio(inode, iov, nr_segs, pos);
}
if (unaligned_aio) {
static unsigned long unaligned_warn_time;
if (printk_timed_ratelimit(&unaligned_warn_time, 60*60*24*HZ))
ext4_msg(inode->i_sb, KERN_WARNING,
"Unaligned AIO/DIO on inode %ld by %s; "
"performance will be poor.",
inode->i_ino, current->comm);
mutex_lock(ext4_aio_mutex(inode));
ext4_aiodio_wait(inode);
}
ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
if (unaligned_aio)
mutex_unlock(ext4_aio_mutex(inode));
return ret;
}
/**
* modem_m6718_spi_send() - send a frame using the IPC protocol
* @modem_spi_dev: pointer to modem driver information structure
* @channel: L2 channel to send on
* @len: length of data to send
* @data: pointer to buffer containing data
*
* Check that the requested channel is supported and open, queue a frame
* containing the data on the appropriate link and ensure the state machine
* is running to start the transfer.
*/
int modem_m6718_spi_send(struct modem_spi_dev *modem_spi_dev, u8 channel,
u32 len, void *data)
{
int err;
struct ipc_link_context *context;
if (!channels[channel].open) {
dev_err(modem_spi_dev->dev,
"error: invalid channel (%d), discarding frame\n",
channel);
return -EINVAL;
}
context = &l1_context.device_context[channels[channel].link];
if (context->state == NULL || context->state->id == IPC_SM_HALT) {
static unsigned long linkfail_warn_time;
if (printk_timed_ratelimit(&linkfail_warn_time, 60 * 1000))
dev_err(modem_spi_dev->dev,
"error: link %d for ch %d is not available, "
"discarding frames\n",
channels[channel].link, channel);
return -ENODEV;
}
err = ipc_queue_push_frame(context, channel, len, data);
if (err < 0)
return err;
if (ipc_util_link_is_idle(context)) {
dev_dbg(modem_spi_dev->dev,
"link %d is idle, kicking\n", channels[channel].link);
ipc_sm_kick(IPC_SM_RUN_TX_REQ, context);
} else {
dev_dbg(modem_spi_dev->dev,
"link %d is already running\n", channels[channel].link);
}
return 0;
}
/* Ratelimit attempts to initialise FDMA */
static int init_fdma_nand_ratelimit(struct stm_nand_emi *data)
{
if (printk_timed_ratelimit(&data->init_fdma_jiffies, 500))
return init_fdma_nand(data);
return -EBUSY;
}
